生物膜贴壁培养小球藻净化猪粪沼液废水的效果

发布时间：2018-01-07 06:23

本文关键词：生物膜贴壁培养小球藻净化猪粪沼液废水的效果　出处：《环境科学》2017年08期 　论文类型：期刊论文

【摘要】：微藻处理猪粪沼液废水是一项污水资源化生物技术.本文以小球藻为研究对象,通过贴壁培养方式,对稀释不同倍数的猪粪沼液废水进行净化处理同时提取藻细胞油脂,旨在探究小球藻贴壁培养处理猪粪沼液废水的效果,分析小球藻耐受猪粪沼液废水的氨氮浓度.将猪粪沼液废水分别稀释1倍(原水)、2倍、5倍、10倍制成培养基.测定贴壁培养小球藻对各处理组猪粪沼液废水中COD、氨氮、总氮、总磷的去除效率及对重金属铜、锌、铁的富集效果,同时探究小球藻的油脂合成情况.结果表明,当猪粪沼液废水稀释5倍时,贴壁小球藻对COD、氨氮、总氮、总磷的净化效果最佳,其去除效率分别为:86.8%、94.1%、85.2%、84.3%;油脂含量高达32.7%;对重金属铜、锌、铁的去除效率分别为:72.9%、70.0%、73.0%;培养一个周期结束时生物产率达到4.21 g·(m~2·d)~(-1).该研究将微藻与难处理的猪粪沼液废水深度净化进行了有效的结合,为实现藻类生物燃料工艺生产及降低废水处理成本提供理论基础.
[Abstract]:The treatment of pig dung biogas wastewater by microalgae is a biological technology of wastewater resource. This paper takes Chlorella vulgaris as the research object, through the way of adhering to the wall culture. In order to explore the effect of Chlorella vulgaris on the treatment of pig manure biogas waste water by purifying and treating different times of porcine manure biogas wastewater and extracting algae cell grease. The ammonia nitrogen concentration of Chlorella vulgaris (Chlorella vulgaris) tolerant to pig manure biogas wastewater was analyzed. The removal efficiency of COD, ammonia nitrogen, total nitrogen, total phosphorus and the enrichment effect of chlorella vulgaris on copper, zinc and iron in waste water from pig manure biogas were determined. At the same time, the oil synthesis of Chlorella vulgaris was studied. The results showed that the purification effect of Chlorella vulgaris on COD, ammonia nitrogen, total nitrogen and total phosphorus was the best when the waste water of pig manure was diluted by 5 times. The removal efficiency is respectively: 86.8and 94.1and 85.2and 84.3, respectively; The oil content was as high as 32.7%. The removal efficiency of heavy metal copper, zinc and iron were 73.0% 72.9% and 70.0% respectively. At the end of a culture cycle, the biological yield was up to 4.21 g 路m ~ (2) 路d ~ (-1). In this study, the microalgae were effectively combined with the difficult to treat pig manure biogas wastewater. It provides a theoretical basis for algae biofuel production and reducing the cost of wastewater treatment.
【作者单位】：三峡大学水利与环境学院三峡库区生态环境教育部工程研究中心;武汉大学水利水电学院;九江学院鄱阳湖生态经济研究中心;湖北工业大学土木建筑与环境学院河湖生态修复与藻类利用湖北省重点实验室;中国科学院青岛生物能源与过程研究所;
【基金】：国家自然科学基金项目(31560724);国家自然科学基金重大项目(91647207) 中国博士后科学基金项目(2016M600616) 国际科技合作项目(2014DFE70070) 国家水体污染控制与治理科技重大专项(2014ZX07104-005-02)
【分类号】：X713
【正文快照】： 随着沼气工程的大规模发展,大量富营养的猪粪沼液废水对水体环境以及人类健康造成严重危害[1,2].猪粪沼液废水是一种较难处理的有机废水,具有高浓度氮磷、成分复杂等特点.在未得到妥善处理的情况下,其中的氮、磷以及有机物等会导致水体富营养化、地下水污染,造成人类饮用水的

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