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ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)最新文献

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A Beacon of Hope in Islamic Moral Values towards Sustainable Restructuring of Nigeria as a Nation 尼日利亚作为一个国家实现可持续重建的伊斯兰道德价值的希望灯塔
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118453
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引用次数: 0
A Comparison of Batch Extracted Bio-oil and Continuous Hydrothermal Liquefaction Bio-oil using Spent Coffee Grounds as Biomass Feedstock 以废咖啡渣为生物质原料间歇提取生物油与连续水热液化生物油的比较
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118262
T. J. V. Rensburg, C. J. Schabort
This study focuses on bio-oil obtained from spent coffee grounds, either by reflux extraction or continuous hydrothermal liquefaction. Spent coffee grounds was chosen as feedstock for this study as it is available around the world and considered a second generation feedstock, as it is a food waste. The production of coffee in 2017 was more than 9.5 million tons, which translates into an increase of 2.3% from 2016. A large portion of coffee beans end up as spent coffee grounds during the production of instant coffee, making this waste product an ideal feedstock for the biofuel industry. Spent coffee grounds was collected from a local coffee shop in Potchefstroom and used as feedstock in the production and extraction of bio-oil from the spent coffee grounds. Reflux extraction was done on the dried spent coffee grounds using hexane, ethanol and acetone as solvents. Different retention times were investigated for each solvent and the yield of the oil was reported. The maximum yield 11.7 wt% was obtained when hexane was used as a solvent. Continuous hydrothermal liquefaction was done using spent coffee grounds as a feedstock and a bio-crude yield of 28.5 wt% was obtained. The average higher heating value of the extracted oils was 39 MJ/kg, while the higher heating value for the hydrothermal liquefaction oil was a bit lower at 36 MJ/kg.
本研究的重点是通过回流萃取或连续水热液化从废咖啡渣中获得生物油。选择废咖啡渣作为本研究的原料,因为它在世界各地都有,并且被认为是第二代原料,因为它是一种食物浪费。2017年咖啡产量超过950万吨,比2016年增长2.3%。在速溶咖啡的生产过程中,很大一部分咖啡豆最终成为废咖啡渣,使这种废物成为生物燃料工业的理想原料。用过的咖啡渣是从Potchefstroom当地的一家咖啡店收集来的,用作从用过的咖啡渣中生产和提取生物油的原料。以己烷、乙醇和丙酮为溶剂,对干燥后的咖啡渣进行回流提取。考察了不同溶剂的保留时间,并报道了油的得率。以己烷为溶剂,收率最高可达11.7 wt%。以废咖啡渣为原料进行连续水热液化,生物粗收率为28.5 wt%。提取油的平均高热值为39 MJ/kg,而水热液化油的平均高热值略低,为36 MJ/kg。
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引用次数: 0
Microbial Screening for Bio-delipidation System of Pre-treated Poultry Slaughterhouse Wastewater: Impact of Solvents, Metal Ions and Detergents on Lipase Activity 预处理家禽屠宰场废水生物脱水系统微生物筛选:溶剂、金属离子和洗涤剂对脂肪酶活性的影响
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118252
M. Basitere, Y. Mpentshu, C. Dlangamandla, B. Chidi
— This study reports on the microbial screening for a bio-delipidation system of lipid-rich slaughterhouse wastewater, and on the optimal conditions for lipase production and activity. In this study, swaps were collected from the poultry slaughterhouse discharge point for screening, isolation and characterisation of lipolytic microorganisms using molecular techniques. Bacillus cereus strains AB1 ( BF3 ) and CC-1 (B3O) were identified using 16S rRNA techniques. Maximal lipase production for both strains was observed between pH 6 – 8 and 45 – 60 °C. Optimal lipase activity for BF3 and B30 was achieved at pH 8 and 60 °C, and at pH 8.83 and 45°C, respectively. After partial purification, increased activity was observed for BF3 and B30 strains. Solvents, metal ions and detergents (triclosan and trichlorocarbonilide) affected lipase activity. It was concluded that BF3 and B30 strains were suitable candidates for bio-delipidation systems.
本研究报道了富脂屠宰场废水生物脱脂系统的微生物筛选,以及脂肪酶产生和活性的最佳条件。在这项研究中,从家禽屠宰场排放点收集交换物,使用分子技术筛选、分离和表征溶脂微生物。采用16S rRNA技术对蜡样芽孢杆菌AB1 (BF3)和CC-1 (b30)菌株进行了鉴定。这两种菌株在pH为6 - 8和45 - 60°C时产生最大的脂肪酶。在pH为8和60°C,以及pH为8.83和45°C时,BF3和B30的脂肪酶活性达到最佳。部分纯化后,菌株BF3和B30活性增强。溶剂、金属离子和洗涤剂(三氯生和三氯碳酸盐)影响脂肪酶活性。结果表明,BF3和B30菌株适合用于生物脱脂系统。
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引用次数: 1
Growth Response of Oreochromis Niloticus Fingerlings to Sun-Dried Maggot Substituted Diets nilochromis鱼种对晒干蛆替代饲料的生长反应
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118452
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引用次数: 0
Hydrothermal Synthesis, Characterisation and Adsorption Testing of MoS2-Zeolite for the Removal of Lead in an Aqueous Solution 水热合成、表征及其对水中铅的吸附试验
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118243
E. Fosso-Kankeu, M. Spiro, F. Waanders, Neeraj Kumar, S. Ray
The shortage of water can be worsened by the pollution of limited water resources by industrial activities such as mining which contribute to significant level of toxic heavy metals in the environments. Heavy metals such as lead could negatively affect the health of consumers ingesting contaminated water and must therefore be removed from existing water sources to ensure that these sources can be used effectively and safely. In this study the potential of zeolite (clinoptilolite) and molybdenum sulfide as effective adsorbents and lead-selective adsorbent, respectively was considered for the hydrothermal synthesis of MoS2-Zeolite composite for effective removal of lead from aqueous solution. The synthesized composite and the parent compounds were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Fourier transformed infrared spectroscopy (FTIR). The results confirmed the properties of the adsorbents as well the successful synthesis of the composite. The adsorbents were used for the removal lead from solution while assessing the effect of adsorbent dosage and initial concentration of lead on the adsorption performance. It was found that clinoptilolite, MoS2 and MoS2-zeolite exhibited adsorption capacities of 3.45, 4.1 and 1.2 mg/g, respectively; indicating that MoS2 was the superior adsorbent. This implies that for metal contaminated solutions, MoS2 will be the ideal adsorbent for the removal of lead. Keywords— Water pollution, lead, adsorbents, zeolite, molybdenum sulfide, adsorption kinetics Manuscript received October 03, 2018. This work was supported in part by the North West University department of Chemical Engineering. E. Fosso-Kankeu is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, South Africa. F. Waanders is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, South Africa. Martin J. Spiro is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, South Africa. Nico Lemmer is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, South Africa. Neeraj Kumar is with the DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa. Suprakas S. Ray is with the DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
诸如采矿等工业活动污染了有限的水资源,造成环境中大量有毒重金属,从而使水资源短缺问题更加严重。铅等重金属可能对饮用受污染水的消费者的健康产生负面影响,因此必须从现有水源中去除,以确保这些水源能够得到有效和安全的利用。本研究考虑了沸石(斜沸石)和硫化钼作为有效吸附剂和铅选择性吸附剂的潜力,分别用于水热合成mos2 -沸石复合材料,以有效去除水溶液中的铅。利用扫描电镜(SEM)、能谱仪(EDS)和傅里叶变换红外光谱(FTIR)对合成的复合物及其母体化合物进行了表征。结果证实了吸附剂的性能,也证实了复合材料的成功合成。研究了吸附剂对铅的去除效果,考察了吸附剂用量和铅初始浓度对铅吸附性能的影响。结果表明,斜沸石、二硫化钼和二硫化钼沸石的吸附量分别为3.45、4.1和1.2 mg/g;表明二硫化钼是较好的吸附剂。这意味着对于金属污染的溶液,二硫化钼将是去除铅的理想吸附剂。关键词:水污染,铅,吸附剂,沸石,硫化钼,吸附动力学这项工作得到了西北大学化学工程系的部分支持。E. Fosso-Kankeu就职于南非西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。F. Waanders就职于南非西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。马丁·斯皮罗(Martin J. Spiro)就职于南非西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。尼科·莱默(Nico Lemmer)就职于南非西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。Neeraj Kumar就职于南非科学与工业研究理事会DST-CSIR国家纳米结构材料中心,比勒陀利亚0001。Suprakas S. Ray就职于DST-CSIR国家纳米结构材料中心,科学和工业研究委员会,比勒陀利亚0001,南非。
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引用次数: 5
Prosumer-behaviour of Chemistry Researchers: An Academic Librarian’s Perspective 化学研究者的产消行为:一个学术图书馆员的视角
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118404
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引用次数: 0
Effect of Temperature and Cathode Material on Power Production in an Earthenware Microbial Fuel Cell 温度和正极材料对陶瓷微生物燃料电池产电的影响
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118237
E. Fosso-Kankeu, G. Rosslee, S. Pandey, F. Waanders, S. Marx
This study investigates the performance of microbial fuel cells (MFCs) fed with municipal sewage water considering parameters such as temperature and cathode materials. Single chamber ceramic MFCs with the cathode exposed to water were used in this study. These MFCs were made from M fine clay which were fired to create a ceramic pot. All four of the ceramics were placed in water, one at 19C and the other three at 37C. Three ceramics, with different cathode materials, were exposed to water at 37C. The cathode materials investigated were clean ceramic, activated carbon and carbon black Vulcan XC-72 (Cabot Corporation). The activated carbon and carbon black Vulcan XC-72 were fixed to the outside of the ceramic using polyvinyl alcohol (PVA) binder. The anode material was made of woven graphite fiber, the surface area of the anode was 136 cm. Voltage readings were taken over a 1000 Ω external resistance every 24 hours. Results indicate that 37C is beneficial for power production. Investigation of cathode materials showed that the carbon black MFC produced the most power, 19.95 mW/m, followed by the activated carbon MFC with, 12.55 mW/m. The clean ceramic MFC produced 8.85 mW/m of power. The activated carbon MFC performed best in terms of wastewater treating ability. The COD in the former MFC decreased with 37.57%, followed by the carbon black MFC with, 34.46%. The carbon black MFC had a CE of 44 %. The use of MFC made of locally available clay material will allow to consider the possibility of sewage wastewater treatment with simultaneous generation of electricity. Keywords—Activated carbon, Carbon black Vulcan XC-72, Ceramic, MFC, Water cathode, Woven graphite fiber Manuscript received October 03, 2018. This work was supported in part by the National Research Foundation (NRF). Elvis Fosso-Kankeu is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, Potchefstroom-South Africa. Gerhard Rosslee is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, Potchefstroom-South Africa. Frans Waanders is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, Potchefstroom-South Africa. Sadanand Pandey is with the Water Pollution Monitoring and Remediation Initiatives Research Group in the School of Chemical and Minerals Engineering of the North West University, Potchefstroom-South Africa. Sanette Marx is with the School of Chemical and Minerals Engineering of the North West University, Potchefstroom-South Africa. Soumya Pandit is with the Amity Institute of Biotechnology, Amity University, Mumbai, India.
本研究考察了以城市污水为原料的微生物燃料电池(mfc)在温度和阴极材料等参数下的性能。本研究采用阴极与水接触的单室陶瓷mfc。这些mfc是由一种精细的粘土制成的,这些粘土被烧制成一个陶瓷罐。所有四个陶瓷都放在水中,一个在19摄氏度,另外三个在37摄氏度。将三种具有不同正极材料的陶瓷置于37℃的水中。正极材料为洁净陶瓷、活性炭和炭黑(Vulcan XC-72)。将活性炭和炭黑Vulcan XC-72用聚乙烯醇(PVA)粘合剂固定在陶瓷的外部。阳极材料为编织石墨纤维,阳极表面积为136 cm。每24小时在1000 Ω外部电阻上读取电压读数。结果表明,37C有利于电力生产。正极材料的研究表明,炭黑MFC产生的功率最大,为19.95 mW/m,其次是活性炭MFC,为12.55 mW/m。清洁陶瓷MFC产生8.85 mW/m的功率。活性炭MFC处理废水的能力最好。前者的COD降低了37.57%,其次是炭黑MFC,降低了34.46%。炭黑MFC的CE为44%。使用由本地可用粘土材料制成的MFC,可以考虑同时发电处理污水和废水的可能性。关键词:活性炭,炭黑,火神XC-72,陶瓷,MFC,水阴极,编织石墨纤维这项工作得到了美国国家研究基金会(NRF)的部分支持。Elvis Fosso-Kankeu就职于位于南非potchefstrom的西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。Gerhard Rosslee就职于位于南非potchefstrom的西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。Frans Waanders就职于位于南非potchefstrom的西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。Sadanand Pandey就职于位于南非potchefstrom的西北大学化学与矿物工程学院水污染监测与修复倡议研究小组。Sanette Marx就职于位于南非potchefstrom的西北大学化学与矿物工程学院。Soumya Pandit就职于印度孟买Amity大学Amity生物技术研究所。
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引用次数: 1
Stakeholders’ Perceptions of Coastal Tourism and its Management: A Case of Nonoti Beach Rural Community in KwaZulu-Natal, South Africa 利益相关者对沿海旅游及其管理的认知:以南非夸祖鲁-纳塔尔省Nonoti海滩乡村社区为例
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118460
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引用次数: 0
Effect of Operating Parameters on Hydrothermal Liquefaction of Sugarcane Bagasse 操作参数对蔗渣水热液化的影响
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118261
Gideon van Rensburg, Rouxné Kruger, S. Marx
Hydrothermal liquefaction (HTL) is a thermochemical process that produces various products from lignocellulosic feedstocks. In this study sugar cane bagasse was used as feedstock for HTL. Experiments were carried out in a batch reactor, at varying operating conditions to investigate the effect on the product yields and product composition. The reactor temperature, heating rate, and retention time were varied, while the volume loading of the reactor and feedstock to water ratio were kept constant. Nitrogen was used to pressurize the reactor for all experiments. It was found that none of the operating conditions have a significant effect on the parameters studied.
水热液化(HTL)是一种从木质纤维素原料中生产各种产品的热化学过程。本研究以甘蔗渣为原料制备HTL。实验在间歇式反应器中进行,在不同的操作条件下,研究对产品收率和产品组成的影响。在反应器温度、升温速率和停留时间不同的情况下,反应器的容积负荷和料水比保持不变。在所有的实验中,氮都被用来给反应器加压。结果表明,各工况对所研究的参数均无显著影响。
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引用次数: 0
Biosurfactant Producing Metallo-Phenolic Tolerant Microbial Consortia for Nitrification 生物表面活性剂产生耐金属酚的硝化微生物群落
Pub Date : 2018-11-19 DOI: 10.17758/eares4.eap1118254
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引用次数: 0
期刊
ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)
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