Pub Date : 2022-04-30DOI: 10.22515/sustinerejes.v6i1.190
Ramesh Babu Aremanda, R.K. Singh
Polypropylene plastics are used extensively in packaging and food services for short usage, poses enormous disposal problem and contributing to over 45 % of globally generated plastic waste. Accordingly, the present work is focused on converting waste polypropylene(WPP) disposable cups in to liquid fuels by employing thermal and catalytic pyrolysis processes. Characterization of WPP disposable cups were performed through proximate and ultimate analyses followed by TGA and found that 86% of its mass degrades in a temperature range of 430 – 603 oC. Effect of temperature in the range of 500 – 650 oC on liquid fuel production at a constant heating rate of 15 oC/min were noted in thermal pyrolysis, an optimum and stable liquid fraction of 76 % with a reaction time of 30 min was recorded at 500 oC. For studies on catalytic pyrolysis, activated carbon (AC) was applied from 470 to 530 oC at variable Feed to Catalyst (F/C) ratio of 1- 4, an optimum liquid yield of 74 % was obtained with a residence time of 35 min at 510 oC and F/C of 3:1. Thermo-physical properties of optimal liquid products were comparable with conventional fossil fuels. XRD and SEM analysis of AC catalyst were showed the presence of carbon at 24o and 42o of 2θ-angle with an apparel pore size of 2 µm.
{"title":"Conversion of waste polypropylene disposable cups into liquid fuels by thermal and catalytic pyrolysis using activated carbon","authors":"Ramesh Babu Aremanda, R.K. Singh","doi":"10.22515/sustinerejes.v6i1.190","DOIUrl":"https://doi.org/10.22515/sustinerejes.v6i1.190","url":null,"abstract":"Polypropylene plastics are used extensively in packaging and food services for short usage, poses enormous disposal problem and contributing to over 45 % of globally generated plastic waste. Accordingly, the present work is focused on converting waste polypropylene(WPP) disposable cups in to liquid fuels by employing thermal and catalytic pyrolysis processes. Characterization of WPP disposable cups were performed through proximate and ultimate analyses followed by TGA and found that 86% of its mass degrades in a temperature range of 430 – 603 oC. Effect of temperature in the range of 500 – 650 oC on liquid fuel production at a constant heating rate of 15 oC/min were noted in thermal pyrolysis, an optimum and stable liquid fraction of 76 % with a reaction time of 30 min was recorded at 500 oC. For studies on catalytic pyrolysis, activated carbon (AC) was applied from 470 to 530 oC at variable Feed to Catalyst (F/C) ratio of 1- 4, an optimum liquid yield of 74 % was obtained with a residence time of 35 min at 510 oC and F/C of 3:1. Thermo-physical properties of optimal liquid products were comparable with conventional fossil fuels. XRD and SEM analysis of AC catalyst were showed the presence of carbon at 24o and 42o of 2θ-angle with an apparel pore size of 2 µm.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46243502","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 : 2022-04-30DOI: 10.22515/sustinerejes.v6i1.199
A. Sinha
Environmental awareness among masses has created tremendous pressure on government and corporates to preserve our natural resources. Globally, many companies have successfully initiated product recovery operations in their business plans. Remanufacturing is one of the highly profitable and sustainable product recovery options. Many Western countries successfully adopted remanufacturing as an alternate source of revenue generation model. But in India, it is still in nascent stage. In this research, we tried to identify the critical factors in the area of “Strategy & Environment” for the viability of remanufacturing business in India. For this, a questionnaire survey was conducted among Indian manufacturing companies and their responses were analyzed. The sample size of the study consists of 72 responses. Afterwards, the identified factors were ranked based on their criticality in initiating remanufacturing activity. The findings may help Indian government and manufacturing firms to frame proper strategy related to environmental aspect of remanufacturing operations in India.
{"title":"Analysis on strategic and environmental issues of remanufacturing in India","authors":"A. Sinha","doi":"10.22515/sustinerejes.v6i1.199","DOIUrl":"https://doi.org/10.22515/sustinerejes.v6i1.199","url":null,"abstract":"Environmental awareness among masses has created tremendous pressure on government and corporates to preserve our natural resources. Globally, many companies have successfully initiated product recovery operations in their business plans. Remanufacturing is one of the highly profitable and sustainable product recovery options. Many Western countries successfully adopted remanufacturing as an alternate source of revenue generation model. But in India, it is still in nascent stage. In this research, we tried to identify the critical factors in the area of “Strategy & Environment” for the viability of remanufacturing business in India. For this, a questionnaire survey was conducted among Indian manufacturing companies and their responses were analyzed. The sample size of the study consists of 72 responses. Afterwards, the identified factors were ranked based on their criticality in initiating remanufacturing activity. The findings may help Indian government and manufacturing firms to frame proper strategy related to environmental aspect of remanufacturing operations in India.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44012597","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 : 2022-04-30DOI: 10.22515/sustinerejes.v6i1.192
E. Abubakar, Rahmatu Yunusa Shariff, Yusuf Sadiq
Inefficiency, emission of greenhouses gases and the deleterious effects of carbonaceous fuels on both human health and the environment are responsible for the increased in exploration and adoption of eco-friendly and sustainable fuels to various aspects of human development and production processes. This study was aimed at the generation, treatment and compressing of biogas into Liquefied Petroleum Gas Cylinder (LPGC) for deployment to firing ceramic kiln. The methodology involved the anaerobic digestion of cow dung and the treatment of the generated gas using water scrubbing technology. The results of the study showed an increased in methane content from an untreated value of 43.5% to 93.98%, the elimination of CO2, and H2S; reduction in volume of gas used in firing a ceramic kiln to 1030 °C from 22,300 L of untreated biogas to 492 L of treated biogas, as well as the prevention of 108,000 g of methane, 124,00 g of CO2, 74,400 g of CO and 173.6 g of NO2 from venting into the climate system.
{"title":"Deployment of treated and compressed biogas as a sustainable fuel for ceramic kiln firing","authors":"E. Abubakar, Rahmatu Yunusa Shariff, Yusuf Sadiq","doi":"10.22515/sustinerejes.v6i1.192","DOIUrl":"https://doi.org/10.22515/sustinerejes.v6i1.192","url":null,"abstract":"Inefficiency, emission of greenhouses gases and the deleterious effects of carbonaceous fuels on both human health and the environment are responsible for the increased in exploration and adoption of eco-friendly and sustainable fuels to various aspects of human development and production processes. This study was aimed at the generation, treatment and compressing of biogas into Liquefied Petroleum Gas Cylinder (LPGC) for deployment to firing ceramic kiln. The methodology involved the anaerobic digestion of cow dung and the treatment of the generated gas using water scrubbing technology. The results of the study showed an increased in methane content from an untreated value of 43.5% to 93.98%, the elimination of CO2, and H2S; reduction in volume of gas used in firing a ceramic kiln to 1030 °C from 22,300 L of untreated biogas to 492 L of treated biogas, as well as the prevention of 108,000 g of methane, 124,00 g of CO2, 74,400 g of CO and 173.6 g of NO2 from venting into the climate system.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48873547","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 : 2022-04-30DOI: 10.22515/sustinerejes.v6i1.207
Optimist Yohanna Habila
This study aimed to make comparative analysis of perspectives of environmental and non-environmental NGOs in Jos Metropolis on key solid waste issues with a view to provide relevant data that would hopefully help in facilitating collaboration between the state and NGOs as well as between NGOs and relevant local and international development partners. Using purposive approach, 115 NGOs in the study area were identified and given the same questionnaire. The study revealed that there are just as many NGOs working in solid waste management (SWM) as there are NGOs that are not (50% each) and there was a link between the NGO categories across all of the parameters considered in the study. It also demonstrated that NGOs' organizational viewpoint on the solid waste issues examined in the study is unaffected by their orientation or primary field of activity, and that registration as a non-environmental NGO is not a disincentive to intervening the area of environment, particularly SWM. It is recommended that the state government adopts an all-encompassing approach or framework that allows for active NGO participation including all relevant stakeholders in the SWM initiatives undertaken by the responsible government agency. Similarly, local and development partners with interest in environmental protection need to assist the NGOs by partnering with them through funding, technical support, and research among other things.
{"title":"Comparative analysis on perspectives of environmental and non-environmental NGOs on solid waste management in Jos metropolis, Nigeria","authors":"Optimist Yohanna Habila","doi":"10.22515/sustinerejes.v6i1.207","DOIUrl":"https://doi.org/10.22515/sustinerejes.v6i1.207","url":null,"abstract":"This study aimed to make comparative analysis of perspectives of environmental and non-environmental NGOs in Jos Metropolis on key solid waste issues with a view to provide relevant data that would hopefully help in facilitating collaboration between the state and NGOs as well as between NGOs and relevant local and international development partners. Using purposive approach, 115 NGOs in the study area were identified and given the same questionnaire. The study revealed that there are just as many NGOs working in solid waste management (SWM) as there are NGOs that are not (50% each) and there was a link between the NGO categories across all of the parameters considered in the study. It also demonstrated that NGOs' organizational viewpoint on the solid waste issues examined in the study is unaffected by their orientation or primary field of activity, and that registration as a non-environmental NGO is not a disincentive to intervening the area of environment, particularly SWM. It is recommended that the state government adopts an all-encompassing approach or framework that allows for active NGO participation including all relevant stakeholders in the SWM initiatives undertaken by the responsible government agency. Similarly, local and development partners with interest in environmental protection need to assist the NGOs by partnering with them through funding, technical support, and research among other things.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43690248","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 : 2022-04-30DOI: 10.22515/sustinerejes.v6i1.194
S. Syaiful, H. Siregar, E. Rustiadi, E. Hariyadi, Muhammad Nanang Prayudyanto, Rulhendri Rulhendri
Each motor vehicle produces a variety of noise. For areas which directly intersects the highway this noise has a considerable impact. The volume of motorcycles and private as well as public vehicles all have a significant effect on noise. From all analytical calculations, the largest equation was obtained one the second day of research on the second point of Sound Level Meter 2 (SLM2). The calculation is that y = 0,0158x – 1,0176. This equation indicates that if there is no decrease in the volume of the motorcycle, the noise level on the SLM2 is 65.21 dBA. If there is an increase or decrease in the volume of a motorcycle, it will have a significant effect on noise. The second largest equation was obtained on the second day of the research at the third point from the Sound Level Meter 3 (SLM3) and the calculation of the equation is y = 0,01 – 6,074. The purpose of the above equation is that if there is an increase in the volume of a motorcycle, the noise on the SLM3 is 60.840 dBA. According to the findings, there was a reduction in the number of motorcycles during the Covid-19 pandemic, because schools were closed and students did not attend school.
{"title":"Noise from the traffic volume of motorcycle during the Covid-19 pandemic: A case study of Wiyata Mandala Junior High Schoool Bogor","authors":"S. Syaiful, H. Siregar, E. Rustiadi, E. Hariyadi, Muhammad Nanang Prayudyanto, Rulhendri Rulhendri","doi":"10.22515/sustinerejes.v6i1.194","DOIUrl":"https://doi.org/10.22515/sustinerejes.v6i1.194","url":null,"abstract":"Each motor vehicle produces a variety of noise. For areas which directly intersects the highway this noise has a considerable impact. The volume of motorcycles and private as well as public vehicles all have a significant effect on noise. From all analytical calculations, the largest equation was obtained one the second day of research on the second point of Sound Level Meter 2 (SLM2). The calculation is that y = 0,0158x – 1,0176. This equation indicates that if there is no decrease in the volume of the motorcycle, the noise level on the SLM2 is 65.21 dBA. If there is an increase or decrease in the volume of a motorcycle, it will have a significant effect on noise. The second largest equation was obtained on the second day of the research at the third point from the Sound Level Meter 3 (SLM3) and the calculation of the equation is y = 0,01 – 6,074. The purpose of the above equation is that if there is an increase in the volume of a motorcycle, the noise on the SLM3 is 60.840 dBA. According to the findings, there was a reduction in the number of motorcycles during the Covid-19 pandemic, because schools were closed and students did not attend school.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48462702","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 : 2021-12-31DOI: 10.22515/sustinere.jes.v5i3.182
J. Ayarkwa, Tonny Ograh, D. Osei-Asibey, A. Acheampong, P. Amoah
Theories are used to improve conceptualization of research ideas. These theories enhance valuable elucidations that helps us to grasp the meaning of research findings. Nevertheless, the use of theories to promote studies in green supplier selection in procurement decisions has attracted little attention. With the emergence of sustainable procurement, public procurement practitioners in Ghana are yet to achieve relevant knowledge on green supplier selections due to insufficient knowledge and inadequate appropriate frameworks. The flagrancy of the consequences of public procurers’ failure to integrate environmental considerations into supplier selection explains the adoption of a multi-theory approach for comprehension of the dynamics of green integration into supplier selection. In this paper, the practicality of three theories for improving the understanding of the influential factors enhancing the integration of environmental sustainability into supplier selection was reviewed. The three theories are: Resource Based Theory, Human Capital Theory and Absorptive Capacity Theory. This review uncovered knowledge management, top management commitment, and environmental management capabilities as important elements needed for the integration of environmental sustainability into supplier selection in public procurement. The theoretical review yielded a framework that conceptualizes knowledge and capabilities of practitioners relevant to incorporation of environmental sustainability into supplier selection in public procurement.
{"title":"Conceptual framework for integrating environmental sustainability into supplier selection in procurement decisions","authors":"J. Ayarkwa, Tonny Ograh, D. Osei-Asibey, A. Acheampong, P. Amoah","doi":"10.22515/sustinere.jes.v5i3.182","DOIUrl":"https://doi.org/10.22515/sustinere.jes.v5i3.182","url":null,"abstract":"Theories are used to improve conceptualization of research ideas. These theories enhance valuable elucidations that helps us to grasp the meaning of research findings. Nevertheless, the use of theories to promote studies in green supplier selection in procurement decisions has attracted little attention. With the emergence of sustainable procurement, public procurement practitioners in Ghana are yet to achieve relevant knowledge on green supplier selections due to insufficient knowledge and inadequate appropriate frameworks. The flagrancy of the consequences of public procurers’ failure to integrate environmental considerations into supplier selection explains the adoption of a multi-theory approach for comprehension of the dynamics of green integration into supplier selection. In this paper, the practicality of three theories for improving the understanding of the influential factors enhancing the integration of environmental sustainability into supplier selection was reviewed. The three theories are: Resource Based Theory, Human Capital Theory and Absorptive Capacity Theory. This review uncovered knowledge management, top management commitment, and environmental management capabilities as important elements needed for the integration of environmental sustainability into supplier selection in public procurement. The theoretical review yielded a framework that conceptualizes knowledge and capabilities of practitioners relevant to incorporation of environmental sustainability into supplier selection in public procurement.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47297036","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 : 2021-12-31DOI: 10.22515/sustinere.jes.v5i3.189
A. Gana, M. Fullen, D. Oloke
Drought is regarded as a natural phenomenon and its impacts accumulate slowly over a long period. It is considered to be insufficient precipitation that leads to water scarcity, as triggered by meteorological parameters, such as temperature, precipitation and humidity. However, drought mitigation has mostly been reactive, but this has been challenged by extreme events globally. Many countries and regions around the world have made efforts in mitigating drought impacts, including Nigeria. This study produced frameworks for drought amelioration and management as a planning tool for Yobe State, Nigeria. Drought coping strategies have also caused environmental degradation in Yobe State. Farmers over-harvest their farms, practise deforestation and over-exploit wild animals. Several efforts to mitigate the impacts of drought by the Nigerian Government have failed, thus this research adopts a bottom-top approach to mitigate drought impacts in Yobe State. Four validated drought mitigation and management frameworks were developed for Yobe State. The frameworks were evaluated pre-use through respondent validation. State officials and farmers believed that these frameworks will reduce the impacts of drought in Yobe State. The frameworks include social, economic, environmental impact mitigation and an Integrated Drought Mitigation and Management Framework. The proposed frameworks were designed and have advocates a paradigm shift, using both proactive and reactive measures.
{"title":"Effects of drought and their mitigation strategies in Yobe State, Nigeria","authors":"A. Gana, M. Fullen, D. Oloke","doi":"10.22515/sustinere.jes.v5i3.189","DOIUrl":"https://doi.org/10.22515/sustinere.jes.v5i3.189","url":null,"abstract":"Drought is regarded as a natural phenomenon and its impacts accumulate slowly over a long period. It is considered to be insufficient precipitation that leads to water scarcity, as triggered by meteorological parameters, such as temperature, precipitation and humidity. However, drought mitigation has mostly been reactive, but this has been challenged by extreme events globally. Many countries and regions around the world have made efforts in mitigating drought impacts, including Nigeria. This study produced frameworks for drought amelioration and management as a planning tool for Yobe State, Nigeria. Drought coping strategies have also caused environmental degradation in Yobe State. Farmers over-harvest their farms, practise deforestation and over-exploit wild animals. Several efforts to mitigate the impacts of drought by the Nigerian Government have failed, thus this research adopts a bottom-top approach to mitigate drought impacts in Yobe State. Four validated drought mitigation and management frameworks were developed for Yobe State. The frameworks were evaluated pre-use through respondent validation. State officials and farmers believed that these frameworks will reduce the impacts of drought in Yobe State. The frameworks include social, economic, environmental impact mitigation and an Integrated Drought Mitigation and Management Framework. The proposed frameworks were designed and have advocates a paradigm shift, using both proactive and reactive measures.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44818927","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 : 2021-12-30DOI: 10.22515/sustinere.jes.v5i3.105
Natasha Ramkissoon-Babwah, Septin Puji Astuti
The global energy market is currently undergoing a transformation at all levels within their supply chains as there is a gradual shift from the fossil fuel paradigm towards sustainable renewable energy (RE) sources and energy efficiencies (EEs). This research study examines this issue by employing an empirical research process. A survey was undertaken with fifty companies operating in Trinidad and Tobago and investigated their interest in adopting RE management systems and EEs. The research revealed that most of the companies have a low level of interest in RE management systems primarily because of current low energy costs for their operations and limited knowledge about current public sector energy incentives. To ameliorate this situation, educational campaigns, training package development, and complementary energy workshops are suggested to motivate and encourage business enterprises to consider the EE pathway.
{"title":"Company perspectives from Trinidad and Tobago on renewable energy management systems and energy efficiencies","authors":"Natasha Ramkissoon-Babwah, Septin Puji Astuti","doi":"10.22515/sustinere.jes.v5i3.105","DOIUrl":"https://doi.org/10.22515/sustinere.jes.v5i3.105","url":null,"abstract":"The global energy market is currently undergoing a transformation at all levels within their supply chains as there is a gradual shift from the fossil fuel paradigm towards sustainable renewable energy (RE) sources and energy efficiencies (EEs). This research study examines this issue by employing an empirical research process. A survey was undertaken with fifty companies operating in Trinidad and Tobago and investigated their interest in adopting RE management systems and EEs. The research revealed that most of the companies have a low level of interest in RE management systems primarily because of current low energy costs for their operations and limited knowledge about current public sector energy incentives. To ameliorate this situation, educational campaigns, training package development, and complementary energy workshops are suggested to motivate and encourage business enterprises to consider the EE pathway.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41776097","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 : 2021-12-28DOI: 10.22515/sustinere.jes.v5i3.163
J. Osei
The study investigates the feasibility of producing bioethanol from corn (Zea mays) wastes. Corn cobs, husks and grains were collected from Githurai market and analysis was done in the Kenyatta university laboratory. Wastes were physically pre-treated to increase their surface area for enzymatic reactions. Separate Hydrolysis and Fermentation were carried out by using Aspergillus niger for enzymatic hydrolysis and Saccharomyces cerevisiae yeast for fermentation at different incubation temperatures (28oC, 30oC, 32oC) and times (24, 48, 72 and 96 hours). Fermentation was carried out in 150 ml cotton- plugged conical flasks containing 100 ml sample hydrolysates inoculated with 2 ml cultured yeast suspension. Ethanol concentration was determined by potassium dichromate oxidation method after each incubation time and expressed as % v/v whilst ethanol yield (l/kg) was derived from the ethanol concentration divided by the quantity of substrates used. Maximum yields of 1.84 l/kg, 1.76 l/kg and 2.05 l/kg were obtained from 50 g of pre-treated corn cobs, corn husks and corn grains respectively. The optimum temperature for maximum ethanol yield in all corn substrates was 30oC whilst incubation time 96 hours, 48 hours and 24 hours were optimum for ethanol production in corn cobs, corn husks and corn grains respectively. Results show that bioethanol can easily be produced from corn wastes and is recommended that they are used wisely for energy generation specifically bioethanol to add value to them rather than landfilling.
{"title":"Utilization of Corn (Zea Mays) wastes in Bioethanol production by Separate Hydrolysis and Fermentation","authors":"J. Osei","doi":"10.22515/sustinere.jes.v5i3.163","DOIUrl":"https://doi.org/10.22515/sustinere.jes.v5i3.163","url":null,"abstract":"The study investigates the feasibility of producing bioethanol from corn (Zea mays) wastes. Corn cobs, husks and grains were collected from Githurai market and analysis was done in the Kenyatta university laboratory. Wastes were physically pre-treated to increase their surface area for enzymatic reactions. Separate Hydrolysis and Fermentation were carried out by using Aspergillus niger for enzymatic hydrolysis and Saccharomyces cerevisiae yeast for fermentation at different incubation temperatures (28oC, 30oC, 32oC) and times (24, 48, 72 and 96 hours). Fermentation was carried out in 150 ml cotton- plugged conical flasks containing 100 ml sample hydrolysates inoculated with 2 ml cultured yeast suspension. Ethanol concentration was determined by potassium dichromate oxidation method after each incubation time and expressed as % v/v whilst ethanol yield (l/kg) was derived from the ethanol concentration divided by the quantity of substrates used. Maximum yields of 1.84 l/kg, 1.76 l/kg and 2.05 l/kg were obtained from 50 g of pre-treated corn cobs, corn husks and corn grains respectively. The optimum temperature for maximum ethanol yield in all corn substrates was 30oC whilst incubation time 96 hours, 48 hours and 24 hours were optimum for ethanol production in corn cobs, corn husks and corn grains respectively. Results show that bioethanol can easily be produced from corn wastes and is recommended that they are used wisely for energy generation specifically bioethanol to add value to them rather than landfilling.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47819775","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 : 2021-12-28DOI: 10.22515/sustinere.jes.v5i3.178
I. Utami, Pidianto Pidianto, Fahmi Hermawan Tricahya, Suci Rahmawati
Microplastics of less than 5 mm have been widely found in the river sediments that cross the city. Sources of microplastic pollutants can be seen in rivers crossing Yogyakarta City studies on microplastic have never been carried out. This study analyzed the abundance and characteristics of microplastics in river sediments of Yogyakarta City. Data collection was carried out in December 2019 in Winongo River, Code River, and Gadjahwong River. Each sample of the three sediments was taken at each point of the three inlets and outlets in Yogyakarta City. The sediment sample was separated to obtain supernatant-containing microplastics. The abundance of microplastics was quantified and grouped based on the shape, size, and color. Data were analyzed using descriptive and inferential statistics to compare the concentration of microplastic in the three rivers. The results showed that the abundance of microplastics ranged from 279.31 to 1,026.93 particles kg-1, with a higher abundance in the inlet than the outlet. The Code River sediment has the highest microplastic abundance, followed by the Gadjahwong River, and Winongo River. The sediment samples in the rivers crossing Yogyakarta City have been contaminated mainly by the fragment-shaped, transparent, and 1-100 µm microplastics.
{"title":"Initial investigation of microplastic pollution in river sediments at Yogyakarta City Indonesia","authors":"I. Utami, Pidianto Pidianto, Fahmi Hermawan Tricahya, Suci Rahmawati","doi":"10.22515/sustinere.jes.v5i3.178","DOIUrl":"https://doi.org/10.22515/sustinere.jes.v5i3.178","url":null,"abstract":"Microplastics of less than 5 mm have been widely found in the river sediments that cross the city. Sources of microplastic pollutants can be seen in rivers crossing Yogyakarta City studies on microplastic have never been carried out. This study analyzed the abundance and characteristics of microplastics in river sediments of Yogyakarta City. Data collection was carried out in December 2019 in Winongo River, Code River, and Gadjahwong River. Each sample of the three sediments was taken at each point of the three inlets and outlets in Yogyakarta City. The sediment sample was separated to obtain supernatant-containing microplastics. The abundance of microplastics was quantified and grouped based on the shape, size, and color. Data were analyzed using descriptive and inferential statistics to compare the concentration of microplastic in the three rivers. The results showed that the abundance of microplastics ranged from 279.31 to 1,026.93 particles kg-1, with a higher abundance in the inlet than the outlet. The Code River sediment has the highest microplastic abundance, followed by the Gadjahwong River, and Winongo River. The sediment samples in the rivers crossing Yogyakarta City have been contaminated mainly by the fragment-shaped, transparent, and 1-100 µm microplastics.","PeriodicalId":22187,"journal":{"name":"Sustinere: Journal of Environment and Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43004844","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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