Enhancement of Microbial Function for a Sulfur Redox Cycle Action in a Sewage Treatment Process Combining an UASB and an Aerobic Filter Reactor

结合 UASB 和好氧过滤反应器增强污水处理过程中硫氧化还原循环作用的微生物功能

基本信息

批准号：
18560538
负责人：
ARAKI Nobuo
金额：
$ 2.45万
依托单位：
Nagaoka National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

The objective of this research is to make a novel wastewater treatment process activated by a sulfur-redox cycle action of microbe in low temperature conditions. This action is carried out by sulfate-reducing bacteria (SRB) and sulfur-oxidizing bacteria (SOB). The reactor system was comprising of an UASB reactor as pre-treatment and an aerobic downflow hanging sponge (DHS) reactor as post-treatment. As the results of reactor operation, the whole process achieved that over 90% of CODcr removal efficiency, less than 35mg-CODcr/L (less than 20mg-BOD/L) of final effluent, at 12hr of HRT and at 8℃ of UASB reactor temperature. As the result of the effect of temperature methane-producing activity (MPA) and sulfate-reducing activity (SRA) of sludge retained in the UASB reactor, below the 25℃ condition, SRA was greater than MPA from acetate and H2/CO2 as test substrate. And that MPA was all but destitute at 15℃, SRA was certain despite at 5℃. The proposed sulfur-redox action process was considered as an applicable process for low strength wastewater treatment in low temperature conditions.The combined system was also applied for low temperature treatment of deicing fluid wastewater. The whole process achieved over 90% of CODcr removal efficiency with less than 30mg-CODcr/L in the final effluent, at an operating temperature of 8 -C and at an HRT of 12h. In UASB sludge, Acetobacterium sp. and Desulfobulbus sp. were found to be predominant species as the relative abundance to DAPI-stained total cells was 10% and 14%, respectively.

本研究的目的是开发一种在低温条件下通过微生物的硫氧化还原循环作用激活的新型废水处理工艺，该作用是由硫酸盐还原菌（SRB）和硫氧化菌（SOB）进行的。反应器系统由作为预处理的UASB反应器和作为后处理的好氧下流式悬挂海绵(DHS)反应器组成。在HRT 12小时、UASB反应器温度8℃的条件下，CODcr去除率达到90%以上，最终出水浓度低于35mg-CODcr/L（低于20mg-BOD/L）。 25℃以下UASB反应器中滞留污泥的高温产甲烷活性（MPA）和硫酸盐还原活性（SRA）条件下，以乙酸盐和 H2/CO2 作为测试底物，SRA 大于 MPA，并且 MPA 在 15℃ 下几乎没有，尽管在 5℃ 下 SRA 是确定的，但所提出的硫氧化还原反应过程被认为是适用的过程。低温条件下的低浓度废水处理。该组合系统还应用于除冰液废水的低温处理，整个工艺实现了90%以上的CODcr去除率，且小于90%。在 8℃ 的操作温度和 12 小时的 HRT 下，最终流出物中的 Acetobacter sp. 和 Desulfobulbus sp. 被发现是 DAPI 染色的主要物种。总细胞数分别为10%和14%。