Pub Date : 2020-04-20DOI: 10.54279/mijeec.v2i1.244953
Prince Junior Asilevi, Daniel Akambawe, Chengwu Yu, Jue Li, Patrick Boakye, Sampson Oduro-Kwarteng, Muhammad Imran Nawaz
The specific input energy (SIE), current density, and discharge power of homemade strong ionization dielectric barrier discharge (DBD) were studied to suppress gas-phase benzene at atmospheric pressure efficiently. Findings indicate that for 300 ppm of benzene at 3.5 kJ/L SIE, benzene's removal efficiency reached 96%. The decline in current density by 66.48% and 43.7% for an initial benzene concentration of 300 ppm was due to increased oxygen content (from 2.4% to 20.9%) and relative humidity (from 18.9% to 90%), respectively, thus reducing electron concentration and consequentially enhanced the removal efficiency over 93%.Furthermore, the decomposition law's beta parameter decreased from 3.1 kJ/L at 300 ppm to 1.6 kJ/L at 100 ppm, indicating that •O and •OH radicals are key species for the decomposition of benzene and electron dissociation reactions largely control the process. The Maxwell– Boltzmann electron energy distribution function was solved using the average energy of the strong ionization discharge reactor (~10 eV), showing that approximately 84.8 % of high energy electrons possess enough energy to cause the benzene ring cleavage and free radical production. The study results show that the strong ionization DBD plasma reactor is highly efficient in removing benzene from industrial waste air, hence air pollution control.
{"title":"Research on the electrical characteristics of atmospheric strong ionization dielectric barrier discharge for air pollution control","authors":"Prince Junior Asilevi, Daniel Akambawe, Chengwu Yu, Jue Li, Patrick Boakye, Sampson Oduro-Kwarteng, Muhammad Imran Nawaz","doi":"10.54279/mijeec.v2i1.244953","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244953","url":null,"abstract":"The specific input energy (SIE), current density, and discharge power of homemade strong ionization dielectric barrier discharge (DBD) were studied to suppress gas-phase benzene at atmospheric pressure efficiently. Findings indicate that for 300 ppm of benzene at 3.5 kJ/L SIE, benzene's removal efficiency reached 96%. The decline in current density by 66.48% and 43.7% for an initial benzene concentration of 300 ppm was due to increased oxygen content (from 2.4% to 20.9%) and relative humidity (from 18.9% to 90%), respectively, thus reducing electron concentration and consequentially enhanced the removal efficiency over 93%.Furthermore, the decomposition law's beta parameter decreased from 3.1 kJ/L at 300 ppm to 1.6 kJ/L at 100 ppm, indicating that •O and •OH radicals are key species for the decomposition of benzene and electron dissociation reactions largely control the process. The Maxwell– Boltzmann electron energy distribution function was solved using the average energy of the strong ionization discharge reactor (~10 eV), showing that approximately 84.8 % of high energy electrons possess enough energy to cause the benzene ring cleavage and free radical production. The study results show that the strong ionization DBD plasma reactor is highly efficient in removing benzene from industrial waste air, hence air pollution control.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"34 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78072948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-10DOI: 10.54279/mijeec.v2i2.245024
Karthick Murugan Palanisamy, Primilla Paramasivam, Gaanty Pragas Maniam, Mohd Hasbi Ab. Rahim, Rameshprabu Ramaraj, Natanamurugaraj Govindan
Freshwater microalgae Chlorella sp. was isolated from the water body of Taman Gelora, Kuantan, Pahang. The isolated monoculture was cultured in different concentration of POME (10%, 20%, 30%, 40% and 50%, v/v) as substrate. The maximal growth and biomass productivity were found in 30% (v/v) of POME. The maximal dry biomass 1.56 g/L was obtained and extracted 39.1% lipid, approximating similar productivity as in conventional BG-11 medium 1.65 g/L of biomass and 41.5% lipid. Gas chromatography-mass spectrometry analysis shows the composition of fatty acids such as linolelaidic acid, oleic acid, palmitic acid, stearic acid, elaidic acid, and α-linoleic acid dominant. The highest fatty acid is linolelsidic acid (41.69%). POME has the potential to be used as a substrate for microalgae Chlorella sp. cultivation.
{"title":"Palm oil mill effluent as a potential medium for microalgae Chlorella sp. cultivation for lipid production","authors":"Karthick Murugan Palanisamy, Primilla Paramasivam, Gaanty Pragas Maniam, Mohd Hasbi Ab. Rahim, Rameshprabu Ramaraj, Natanamurugaraj Govindan","doi":"10.54279/mijeec.v2i2.245024","DOIUrl":"https://doi.org/10.54279/mijeec.v2i2.245024","url":null,"abstract":"Freshwater microalgae Chlorella sp. was isolated from the water body of Taman Gelora, Kuantan, Pahang. The isolated monoculture was cultured in different concentration of POME (10%, 20%, 30%, 40% and 50%, v/v) as substrate. The maximal growth and biomass productivity were found in 30% (v/v) of POME. The maximal dry biomass 1.56 g/L was obtained and extracted 39.1% lipid, approximating similar productivity as in conventional BG-11 medium 1.65 g/L of biomass and 41.5% lipid. Gas chromatography-mass spectrometry analysis shows the composition of fatty acids such as linolelaidic acid, oleic acid, palmitic acid, stearic acid, elaidic acid, and α-linoleic acid dominant. The highest fatty acid is linolelsidic acid (41.69%). POME has the potential to be used as a substrate for microalgae Chlorella sp. cultivation.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85579566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aimed to investigate the cost and benefit as well as other economic analysis of Nile tilapia culture in the biofloc system. The data derived from the selected study area where was the initial farm rearing in biofloc system in Chiang Mai province, Thailand. The study revealed that the 50 fingerings m-3 were released in sphere-shape polyethylene ponds (9 m of diameter x 1.20 m height), and raised for 5 months to reach the harvest size (500-600 g). The fish yield was about 1,500 kg/pond or 25 kg m-3. Total production cost was 101,988 Baht, divided into total fixed cost 13,656 Baht/pond (13.39%) and total variable cost 88,333 Baht/pond (86.61%). Fish feed cost was the highest at price (58.34%). The fish price was determined at 85 Baht/kg, 15% increasing from Nile tilapia common culture. Because they were cultured in the chemical and antibiotic-free system that produced the income to 121,125 Baht/pond and would receive net profit at 19,137 Baht/pond on average from 1,425 kg/pond with 95% of survival rate. Total income was 484,500 Baht/crop and total net profit was 76,549 Baht/crop. In other words, the net profit per kg was 13 Baht. The benefit and cost ratio (B/C ratio) was 1.19, and the net present value (NPV) assessment was 1.43 million Baht, which means worthiness to invest. The expected returns of this project or Internal rate of return; IRR was 45%, which was a greater ratio than the minimum expected returns (15% of the interest rate of return calculation). The payback period was 7.14 years, which indicated that the investors had to run this business for 7 years and one and a half months to recover their investment money. Consequently, the business has a favorable prospect, and the biofloc system for the culture of tilapia is applicable for fish farmers.
{"title":"A cost and benefit analysis of Nile tilapia culture in biofloc technology, the environmental friendly system: the case of selected farm in Chiang Mai, Thailand","authors":"Sudaporn Tongsiri, Nongnaphat Somkane, Udomluk Sompong,, Daracha Thiammueang","doi":"10.54279/mijeec.v2i1.244952","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244952","url":null,"abstract":"This study aimed to investigate the cost and benefit as well as other economic analysis of Nile tilapia culture in the biofloc system. The data derived from the selected study area where was the initial farm rearing in biofloc system in Chiang Mai province, Thailand. The study revealed that the 50 fingerings m-3 were released in sphere-shape polyethylene ponds (9 m of diameter x 1.20 m height), and raised for 5 months to reach the harvest size (500-600 g). The fish yield was about 1,500 kg/pond or 25 kg m-3. Total production cost was 101,988 Baht, divided into total fixed cost 13,656 Baht/pond (13.39%) and total variable cost 88,333 Baht/pond (86.61%). Fish feed cost was the highest at price (58.34%). The fish price was determined at 85 Baht/kg, 15% increasing from Nile tilapia common culture. Because they were cultured in the chemical and antibiotic-free system that produced the income to 121,125 Baht/pond and would receive net profit at 19,137 Baht/pond on average from 1,425 kg/pond with 95% of survival rate. Total income was 484,500 Baht/crop and total net profit was 76,549 Baht/crop. In other words, the net profit per kg was 13 Baht. The benefit and cost ratio (B/C ratio) was 1.19, and the net present value (NPV) assessment was 1.43 million Baht, which means worthiness to invest. The expected returns of this project or Internal rate of return; IRR was 45%, which was a greater ratio than the minimum expected returns (15% of the interest rate of return calculation). The payback period was 7.14 years, which indicated that the investors had to run this business for 7 years and one and a half months to recover their investment money. Consequently, the business has a favorable prospect, and the biofloc system for the culture of tilapia is applicable for fish farmers.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83123733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-30DOI: 10.54279/mijeec.v2i2.245022
Madderla, Tarun Kumar Merla, Harikumar
This paper presents the systematic approach of design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders and testing the welded samples obtained. The TIG welding unit is used to make a circumferential joining on tank and piping, which are fixed onto the welding fixture and several parameters such as the setting of voltage, current and travel speed (rotational speed) is used for fabrication setup. The fabrication fixture with a constant rotation speed is obtained by revolving the tank or pipe with an electrical adjustable speed control motor. The report is focused on the welding of the aluminum workpiece using TIG welding. The joint of mechanical properties is determined by a static tensile test, impact test, and hardness test. This fixture, all the parameters can be determined, and it's an easy way to get the constant shape of welding joint at all joining by using the welding fixture, the evaluation by determination of joining quality can easily be used, especially for circumferential joint on tank and piping with a cylindrical shape.
{"title":"Design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders using tig welding","authors":"Madderla, Tarun Kumar Merla, Harikumar","doi":"10.54279/mijeec.v2i2.245022","DOIUrl":"https://doi.org/10.54279/mijeec.v2i2.245022","url":null,"abstract":"This paper presents the systematic approach of design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders and testing the welded samples obtained. The TIG welding unit is used to make a circumferential joining on tank and piping, which are fixed onto the welding fixture and several parameters such as the setting of voltage, current and travel speed (rotational speed) is used for fabrication setup. The fabrication fixture with a constant rotation speed is obtained by revolving the tank or pipe with an electrical adjustable speed control motor. The report is focused on the welding of the aluminum workpiece using TIG welding. The joint of mechanical properties is determined by a static tensile test, impact test, and hardness test. This fixture, all the parameters can be determined, and it's an easy way to get the constant shape of welding joint at all joining by using the welding fixture, the evaluation by determination of joining quality can easily be used, especially for circumferential joint on tank and piping with a cylindrical shape.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81123487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-25DOI: 10.54279/mijeec.v2i1.244951
Madderla Sandhya, D. Ramasamy, Irshad ahamad Khilji, Anil Kumar, S. Chandramouli, G. Vinod Kumar
This project aims to investigate and predict the optimal choice for each EDM parameter using Taguchi Method by conducting a limited number of experiments on “Nimonic” Material. These parameters have a significant influence on the machining characteristics like MRR and TWR. Taguchi design of experiments (DOE) are implemented, particularly L9 orthogonal array is chosen and the effect of dominating process parameters is evaluated using analysis of variance. Nimonic refers to a family of Nickel-based high-temperature low creep superalloys. Due to its ability to withstand very high temperatures, Nimonic is ideal for typical applications such as aircraft parts, gas turbine components and blades, exhaust nozzles etc., for instance, where the pressure and heat are extreme. However, the conventional methods are not suitable to machine the hardest material such as Nimonic superalloy. The EDM, one of the popular unconventional machining methods, is used to the machine with a copper electrode, which in turn uses Taguchi methodology to analyze the effect of each parameter on the machining characteristics. The optimal choice for each EDM parameter such as peak current, gap voltage, duty cycle and pulse on time using the Taguchi method and Genetic Algorithm are identified. These parameters have a significant influence on machining characteristics such as MRR, EWR and surface roughness.
{"title":"Optimization of process parameters in machining of nimonic super-alloy on EDM using genetic algorithm","authors":"Madderla Sandhya, D. Ramasamy, Irshad ahamad Khilji, Anil Kumar, S. Chandramouli, G. Vinod Kumar","doi":"10.54279/mijeec.v2i1.244951","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244951","url":null,"abstract":"This project aims to investigate and predict the optimal choice for each EDM parameter using Taguchi Method by conducting a limited number of experiments on “Nimonic” Material. These parameters have a significant influence on the machining characteristics like MRR and TWR. Taguchi design of experiments (DOE) are implemented, particularly L9 orthogonal array is chosen and the effect of dominating process parameters is evaluated using analysis of variance. Nimonic refers to a family of Nickel-based high-temperature low creep superalloys. Due to its ability to withstand very high temperatures, Nimonic is ideal for typical applications such as aircraft parts, gas turbine components and blades, exhaust nozzles etc., for instance, where the pressure and heat are extreme. However, the conventional methods are not suitable to machine the hardest material such as Nimonic superalloy. The EDM, one of the popular unconventional machining methods, is used to the machine with a copper electrode, which in turn uses Taguchi methodology to analyze the effect of each parameter on the machining characteristics. The optimal choice for each EDM parameter such as peak current, gap voltage, duty cycle and pulse on time using the Taguchi method and Genetic Algorithm are identified. These parameters have a significant influence on machining characteristics such as MRR, EWR and surface roughness.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83733314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The papaya and pineapple are the major agricultural food products in Thailand. Their by-products contain protease enzyme, papain and bromelain, which can breakdown proteins. The objective of this study was to investigate the growth performances of channel catfish (Ictalurus punctatus) fed with feed mixed with pineapples juice (PA) and dried papaya peel (PP) in a recirculating aquaculture system (RAS). Three experimental feeds controlled at 25% isonitrogenous formulation containing 5 ml/kg feed PA, 5 g/kg feed PP, mixed PP-PA (5 ml/kg) feed pineapple juice mixed with 5 g/kg feed papaya peel (PP-PA) and a commercial control feed were fed to catfish for 90 days. Each treatment had 3 replicates. The channel catfish (5 g/fish) were allocated in 12 (1 x 1 x 1 m) placed in RAS concrete tanks. The water quality in this research was within the recommended nets levels by the Pollution Control Department, Thailand. The results showed that weight gain, length gain, average daily gain, feed conversion efficiency and protein efficiency ratio was highest in catfish fed with PP and which was significantly different (p < 0.05) from control. The survival rate of all treatments was not significantly different (p > 0.05). In conclusion, 5 g of dried papaya peel mixed in the 1 kg of diet could be applied for channel catfish culture to improve growth performances.
木瓜和菠萝是泰国的主要农产品。它们的副产物包括蛋白酶、木瓜蛋白酶和菠萝蛋白酶，它们可以分解蛋白质。本试验旨在研究在循循水养殖系统(RAS)中，菠萝汁(PA)和干木瓜皮(PP)混合饲料对槽鱼(Ictalurus punctatus)生长性能的影响。采用25%等氮配方(含5 ml/kg饲料PA、5 g/kg饲料PP、5 ml/kg混合PP-PA、5 ml/kg菠萝汁混合5 g/kg饲料木瓜皮(PP-PA))和1种商品对照饲料)饲喂鲶鱼90 d。每个处理3个重复。沟槽鲶鱼(5 g/条)被分配在12个(1 x 1 x 1 m)的RAS混凝土罐中。本研究的水质在泰国污染控制部门建议的净水平范围内。结果表明:添加PP的鲶鱼增重、体长、平均日增重、饲料转化效率和蛋白质效率最高，与对照组差异显著(p < 0.05);各组患者的生存率差异无统计学意义(p > 0.05)。综上所述，在1 kg饲料中添加5 g木瓜干皮可提高槽型鲶鱼的生长性能。
{"title":"Effect of pineapple juice and dried papaya peel in the diet on growth performances of channel catfish (Ictalurus punctatus)","authors":"Tipsukhon Pimpimol, Daracha Thiammueang, Karnchana Karnchanamayoon, Kittikorn Kanjanamayoon, Sudaporn Tongsiri","doi":"10.54279/mijeec.v2i1.244950","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244950","url":null,"abstract":"The papaya and pineapple are the major agricultural food products in Thailand. Their by-products contain protease enzyme, papain and bromelain, which can breakdown proteins. The objective of this study was to investigate the growth performances of channel catfish (Ictalurus punctatus) fed with feed mixed with pineapples juice (PA) and dried papaya peel (PP) in a recirculating aquaculture system (RAS). Three experimental feeds controlled at 25% isonitrogenous formulation containing 5 ml/kg feed PA, 5 g/kg feed PP, mixed PP-PA (5 ml/kg) feed pineapple juice mixed with 5 g/kg feed papaya peel (PP-PA) and a commercial control feed were fed to catfish for 90 days. Each treatment had 3 replicates. The channel catfish (5 g/fish) were allocated in 12 (1 x 1 x 1 m) placed in RAS concrete tanks. The water quality in this research was within the recommended nets levels by the Pollution Control Department, Thailand. The results showed that weight gain, length gain, average daily gain, feed conversion efficiency and protein efficiency ratio was highest in catfish fed with PP and which was significantly different (p < 0.05) from control. The survival rate of all treatments was not significantly different (p > 0.05). In conclusion, 5 g of dried papaya peel mixed in the 1 kg of diet could be applied for channel catfish culture to improve growth performances.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85327973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tilapia is a popular fish for consumers and aquaculture in every part of Thailand. This study was conducted to determine the level of mineral supplementation in the diet for the growth of red tilapia fingerlings, which gave the lower fish production cost. The fingerlings with an initial average weight of 3.1 ± 0.48 g and a length of 2.5±0.24 cm were raised in 3 m3 concrete tank with 1.5 m3 of water volume at 20 fish/m2 stocking density. Fish were fed with pellets diet (28 % crude protein), which contained different levels of mineral supplements (0 (control), 20 and 40 g/Kg) in triplicate replications. The experiment was conducted within 80 days. The results showed that fish fed with diet3 had better average daily weight gain (ADG) and food conversion ratio (FCR) than diet2 and diet1 significantly (P<0.05). The ADG and FCR of fish fed with diet3 showed 0.70 ± 0.02, 1.72 ± 0.02 respectively, but there was a non-significant difference in survival rate from all treatments (P>0.05), and the fish production cost of diet 3 is lower than those in diet1 and diet2. Thus, this experiment concluded that minerals supplementation at the level 40 g/kg diet were suitable for tilapia aquaculture.
{"title":"Effect of dietary supplementation of minerals premix on growth performances and return in red tilapia (Oreochromis nilloticus x Oreochromis mossambicus)","authors":"Krasindh Hangsapreurke, Boonyarath Pratoomchat, Jiranan Seetaikum, Nissara Kitcharoen","doi":"10.54279/mijeec.v2i1.244948","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244948","url":null,"abstract":"Tilapia is a popular fish for consumers and aquaculture in every part of Thailand. This study was conducted to determine the level of mineral supplementation in the diet for the growth of red tilapia fingerlings, which gave the lower fish production cost. The fingerlings with an initial average weight of 3.1 ± 0.48 g and a length of 2.5±0.24 cm were raised in 3 m3 concrete tank with 1.5 m3 of water volume at 20 fish/m2 stocking density. Fish were fed with pellets diet (28 % crude protein), which contained different levels of mineral supplements (0 (control), 20 and 40 g/Kg) in triplicate replications. The experiment was conducted within 80 days. The results showed that fish fed with diet3 had better average daily weight gain (ADG) and food conversion ratio (FCR) than diet2 and diet1 significantly (P<0.05). The ADG and FCR of fish fed with diet3 showed 0.70 ± 0.02, 1.72 ± 0.02 respectively, but there was a non-significant difference in survival rate from all treatments (P>0.05), and the fish production cost of diet 3 is lower than those in diet1 and diet2. Thus, this experiment concluded that minerals supplementation at the level 40 g/kg diet were suitable for tilapia aquaculture.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81419463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the present study, the daily relative growth rates of the green macroalga (sea grape, Caulerpa lentillifera) in artificial seawater closed system with cement ponds was evaluated. Cultivation in artificial seawater was investigated for the combined impact of three significant aspects: algal productivity, water quality and nutritional value. Sea grape was cultured for 30 days and important factors were analyzed weekly, and the results showed that the fastest growth rate (productivity rate) was recorded in the second week at 23.27 g.day-1. After that, biomass yield was steadily decreased to 11.67 g.day-1 in the fourth week. The ranges of the experimental cultivation conditions were salinity (29.13 - 31.54 ppt), pH (8.42 - 9.41), air temperature (12.14 - 35.13ºC), water temperature (21.02 - 24.64ºC), light intensity (0 - 35,350.00 lux), electrical conductivity, EC (46.67 - 48.62 ms.cm-1), total dissolved solids, TDS (25.22 - 26.14 g.l-1) and alkalinity (74.00 - 106.67 mg.l-1). During cultivation, the EC was high and the values were quite stable. The amount of ammonia-nitrogen, nitrite-nitrogen, nitrate-nitrogen ranged were 0.17 - 7.20, 2.04 - 8.51 and 2.06 - 3.60 mg.l-1, respectively. The amount of inorganic phosphorus (phosphate phosphorus) was between 0.58 - 0.91 mg.l-1. The nutritional value of cultivated sea grape was performed by dry algal weight and the amount of protein, fat, moisture, ash, fiber and carbohydrate were 24.44 ± 4.329, 2.07 ± 0.13, 8.53 ± 0.40, 38.99 ± 0.30, 14.50 ± 1.28 and 11.47%, respectively. This artificial seawater grown algae contained a high amount of protein (24.44%), and our study results show that artificial seawater cultivation presents positive production of nutritions.
{"title":"Sea grape (Caulerpa lentillifera) cultivation in artificial seawater closed system","authors":"Udomluk Sompong,, Jirayu Mingkaew, Doungporn Amornlerdpison, Kriangsak Mengumphan","doi":"10.54279/mijeec.v2i1.244947","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244947","url":null,"abstract":"In the present study, the daily relative growth rates of the green macroalga (sea grape, Caulerpa lentillifera) in artificial seawater closed system with cement ponds was evaluated. Cultivation in artificial seawater was investigated for the combined impact of three significant aspects: algal productivity, water quality and nutritional value. Sea grape was cultured for 30 days and important factors were analyzed weekly, and the results showed that the fastest growth rate (productivity rate) was recorded in the second week at 23.27 g.day-1. After that, biomass yield was steadily decreased to 11.67 g.day-1 in the fourth week. The ranges of the experimental cultivation conditions were salinity (29.13 - 31.54 ppt), pH (8.42 - 9.41), air temperature (12.14 - 35.13ºC), water temperature (21.02 - 24.64ºC), light intensity (0 - 35,350.00 lux), electrical conductivity, EC (46.67 - 48.62 ms.cm-1), total dissolved solids, TDS (25.22 - 26.14 g.l-1) and alkalinity (74.00 - 106.67 mg.l-1). During cultivation, the EC was high and the values were quite stable. The amount of ammonia-nitrogen, nitrite-nitrogen, nitrate-nitrogen ranged were 0.17 - 7.20, 2.04 - 8.51 and 2.06 - 3.60 mg.l-1, respectively. The amount of inorganic phosphorus (phosphate phosphorus) was between 0.58 - 0.91 mg.l-1. The nutritional value of cultivated sea grape was performed by dry algal weight and the amount of protein, fat, moisture, ash, fiber and carbohydrate were 24.44 ± 4.329, 2.07 ± 0.13, 8.53 ± 0.40, 38.99 ± 0.30, 14.50 ± 1.28 and 11.47%, respectively. This artificial seawater grown algae contained a high amount of protein (24.44%), and our study results show that artificial seawater cultivation presents positive production of nutritions.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91385368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The increasing consumption and demand for fossil fuels have more significance than before alarm above its lessening rate and for that reason, stimulated the actions are needed to challenge the issue with an efficient and less polluting alternative fuel for diesel. This study evaluated the performance of an 8.2 kW small diesel engine using three fuels, namely diesel, waste cooking oil biodiesel and wild tree biodiesel, such as granadilla oil biodiesel (GBD) and tung oil biodiesel (TBD). The experimental engine was tested at 1,500 rpm of constant engine speed and 20–80% of engine load. The specific fuel consumption, brake specific energy consumption, brake mean sufficient pressure, brake thermal efficiency, exhaust emission and temperature were evaluated. It was found that the small diesel engine worked well using wild trees biodiesel. The brake means effective pressures were lower by 5–8% and thermal brake efficiency was decreased in the range of 9–15%, compared with diesel fuel. The exhaust emission was lower than Thailand’s industrial standard and slightly higher than waste cooking oil biodiesel and diesel fuel operation. The operation of biodiesel from wild trees is suitable for farmers and is considered feasible for local communities in the future.
{"title":"Experimental investigation of a small agricultural diesel engine performance using community biodiesel from wild trees","authors":"Nigran Homdoung, Kittikorn Sasujit, Natthawud Dussadee, Rameshprabu Ramaraj","doi":"10.54279/mijeec.v2i1.244946","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244946","url":null,"abstract":"The increasing consumption and demand for fossil fuels have more significance than before alarm above its lessening rate and for that reason, stimulated the actions are needed to challenge the issue with an efficient and less polluting alternative fuel for diesel. This study evaluated the performance of an 8.2 kW small diesel engine using three fuels, namely diesel, waste cooking oil biodiesel and wild tree biodiesel, such as granadilla oil biodiesel (GBD) and tung oil biodiesel (TBD). The experimental engine was tested at 1,500 rpm of constant engine speed and 20–80% of engine load. The specific fuel consumption, brake specific energy consumption, brake mean sufficient pressure, brake thermal efficiency, exhaust emission and temperature were evaluated. It was found that the small diesel engine worked well using wild trees biodiesel. The brake means effective pressures were lower by 5–8% and thermal brake efficiency was decreased in the range of 9–15%, compared with diesel fuel. The exhaust emission was lower than Thailand’s industrial standard and slightly higher than waste cooking oil biodiesel and diesel fuel operation. The operation of biodiesel from wild trees is suitable for farmers and is considered feasible for local communities in the future.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79493495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-10DOI: 10.54279/mijeec.v2i1.244945
Nithin B. R., Prakash Bhuyar, Marlen Trejo, Mohd Hasbi Ab. Rahim, Gaanty Pragas Maniam, Natanamurugaraj Govindan
Nowadays, the water pollution is leading issue due to palm oil mill effluent (POME), waste from palm oil production is a big problem to Malaysia which is largest palm oil producers. POME containing large amount of chemical oxygen demand (COD) which can cause severe pollution to the environment especially water. This present study designed for culturing green algae (Chlorella sp.) isolated from Pantai Balok, Kuantan which is most common microalgae with palm oil mill effluent (POME). Chlorella sp. was cultured using BG-11 medium with the addition of POME as experiment and without POME as control. The POME responsible for the growth of green algae is studied by measurement of the growth rate, total cell count and chemical oxygen demand (COD) for both conditions. The composition for control and experiment is also measured and determined by using Gas Chromatography Mass Spectrometry (GCMS). From the results, it is observed that the total cell count and growth rate of Chlorella sp. greater in presence of POME since the green microalgae absorbs the essential nutrients from the POME as their nutrients. GCMS revealed that the difference in composition for both the conditions. Results concluded that several COD also vigorously deplete with the help of green algae digestion. Cultivation of Chlorella sp. in POME will help in future water pollution treatment.
{"title":"Culturing of green photosynthetic microalgae (Chlorella sp.) using palm oil mill effluent (POME) for future biodiesel production","authors":"Nithin B. R., Prakash Bhuyar, Marlen Trejo, Mohd Hasbi Ab. Rahim, Gaanty Pragas Maniam, Natanamurugaraj Govindan","doi":"10.54279/mijeec.v2i1.244945","DOIUrl":"https://doi.org/10.54279/mijeec.v2i1.244945","url":null,"abstract":"Nowadays, the water pollution is leading issue due to palm oil mill effluent (POME), waste from palm oil production is a big problem to Malaysia which is largest palm oil producers. POME containing large amount of chemical oxygen demand (COD) which can cause severe pollution to the environment especially water. This present study designed for culturing green algae (Chlorella sp.) isolated from Pantai Balok, Kuantan which is most common microalgae with palm oil mill effluent (POME). Chlorella sp. was cultured using BG-11 medium with the addition of POME as experiment and without POME as control. The POME responsible for the growth of green algae is studied by measurement of the growth rate, total cell count and chemical oxygen demand (COD) for both conditions. The composition for control and experiment is also measured and determined by using Gas Chromatography Mass Spectrometry (GCMS). From the results, it is observed that the total cell count and growth rate of Chlorella sp. greater in presence of POME since the green microalgae absorbs the essential nutrients from the POME as their nutrients. GCMS revealed that the difference in composition for both the conditions. Results concluded that several COD also vigorously deplete with the help of green algae digestion. Cultivation of Chlorella sp. in POME will help in future water pollution treatment.","PeriodicalId":18176,"journal":{"name":"Maejo International Journal of Energy and Environmental Communication","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88907347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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