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标题：Influence of Temperature and Oxidation-Reduction Potential on Hydrolysis of Swine Manure Wastewater
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作者：Worakan Chetawan ; Kanyarat Saritpongteeraka ; Sumate Chaiprapat 等
期刊名称：International Journal of Environmental Science and Development
印刷版ISSN：2010-0264
出版年度：2020
卷号：11
期号：3
页码：143-147
DOI：10.18178/ijesd.2020.11.3.1241
摘要：Thermal and micro-aeration pretreatments were applied to swine wastewater in order to improve hydrolysis of the substrate for biogas production.The experiments were carried out in 5-L reactors using 1% total solids concentration swine manure wastewater.Thermal pretreatments were performed at temperature of 30 oC (room temperature), 45 oC and 55 oC, while the micro-aeration pretreatments were operated at controlled ORP of -300 and -420 mV.Results indicated that hydrolysis in terms of sCOD release was increased by 18.5% and 23.1% at 45 and 55 oC, respectively (compared to 30 oC).TVFA also increased as a result of heightened acidogenesis.Micro-aeration could improve hydrolysis by 10.1% and 21.3%, and TVFA by 7.23% and 12.87% (compared to non micro-aeration/uncontrolled ORP) at ORP -300 and -420 mV, respectively.Both pretreatment methods attained high hydrolysis efficiency within 24 hr. However, too long of micro-aeration could lead to a loss of organic carbon thru oxidation as evidenced by the disappearing organic acids in the test reactors.Both thermal and micro-aeration pretreatments are environmental friendly and could be a simple solution to increase efficiency of biogas production by means of pre-hydrolysis.
关键词：Swine manure wastewater; hydrolysis; temperature; micro-aeration; pretreatment.