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Wastewater treatment under low temperature conditions by sulfur redox process and analyses of the biological consortia

低温条件下硫氧化还原工艺处理废水及生物群落分析

基本信息

批准号：
16360269
负责人：
YAMAGUCHI Takashi
金额：
$ 9.6万
依托单位：
Kure college of technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
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 process 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 30 mgCODcr/L (less than 15 mgBOD/L) of final effluent, at 12 hr of HRT and at 8 ℃ of UASB reactor temperature. Acetobacterium sp. was detected as predominant species by PCR-DGGE method targeting 16SrDNA with band excision and sequence analysis. In the UASB reactor, various species of sulfate-reducing bacterium, Desulfobulbus sp., Desufovivrio sp., and Desulfomicrobium sp., were found by cloning analysis. In the DHS reactor, Tetracoccus sp. presented as dominant. The proposed sulfur- … More redox action process was considered as an applicable process for low strength wastewater treatment in low temperature conditions.Further more, process performance of the wastewater treatment system was investigated using a pilot-scale reactor system fed with actual sewage for over 600 days. The reactor system was consisted of a denitrification reactor, an UASB reactor, and a DHS reactor with recirculation line. As the results, the total CODcr of 331±117 mg・L^<-1> (total BOD of 128±32 mg・L^<-1>) at influent was reduced desirably to 70±33 mg・L^<-1> of DHS effluent (7±3 mgBOD・L^<-1>) at final effluent with low SS accumulation such as 2-3 % of inlet SS, on the condition of the overall HRT of 24-12 hr and the recirculation ratio of 2-0.3 throughout the experimental period. The final effluent also showed superior quality with respect to low SS, 13±6 mgSS・L^<-1> and high nitrogen removal efficiency, 58±7 % at recirculation ratio 2. Microbial activity test and FISH analysis, it revealed that sulfate-reducing bacteria contributed to degrade of organic matter in the UASB reactor even low temperature condition that it would be less than 10 ℃. Less

本研究的目的是建立一种在低温条件下由微生物的硫-氧化还原循环作用激活的废水处理新工艺。这一作用是由硫酸盐还原菌（SRB）和硫氧化菌（SOB）完成的。该工艺由一个UASB反应器作为前处理和一个好氧下流悬挂海绵（DHS）反应器作为后处理组成。反应器运行结果表明，在HRT时间为12小时、UASB反应器温度为8℃的条件下，整个工艺流程的CODcr去除率达到90%以上，最终出水CODcr去除率小于30 mgdcr /L（小于15 mgBOD/L）。采用PCR-DGGE法对16SrDNA进行条带切除和序列分析，检测到Acetobacterium sp.为优势种。通过克隆分析，在UASB反应器中发现了多种硫酸盐还原菌，分别为Desulfobulbus sp.、Desufovivrio sp.和desulfoicroum sp.。在DHS反应器中，四球菌属呈现优势。提出的硫-多氧化还原工艺是低温条件下处理低强度废水的可行工艺。此外，污水处理系统的工艺性能进行了研究，使用中试规模的反应器系统，以实际污水为饲料超过600天。该反应器系统由一个反硝化反应器、一个UASB反应器和一个带循环管路的DHS反应器组成。结果表明，在总HRT为24-12小时，整个实验期间再循环比为2-0.3的条件下，进水总CODcr为331±117 mg·L^<-1>（总BOD为128±32 mg·L^<-1>）， DHS出水总CODcr为70±33 mg·L^<-1>（总BOD为7±3 mgBOD·L^<-1>）， SS积累较低，为进口SS的2- 3%。最终出水也表现出较好的质量，低SS为13±6 mgSS·L^<-1>，高氮去除率为58±7%，再循环比2。微生物活性测试和FISH分析表明，即使在低于10℃的低温条件下，硫酸盐还原菌也对UASB反应器中的有机物有降解作用。少

项目成果

期刊论文数量（36）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

LOW STRENGTH WASTEWATER 'TREATMENT UNDER LOW TEMPERATURE CONDITION BY THE NOVEL SULFUR REDOX ACTION PROCESS

新型硫氧化还原工艺在低温条件下处理低浓度废水

DOI：
发表时间：
2005
期刊：
IWA-ASPIRE Regional Conference and Exhibition (CD-ROM) 7D-1, ASPIRE
影响因子：
0
作者：
T.Yamaguchi;Y.Bungo;M.Takahashi;H.Sumino;A.Nagano;N.Araki;S.Yamazaki;H.Harada
通讯作者：
H.Harada

Treatment of a Low-Strength wastewater using UASB and DHS reactors at low temperature condition -Part 2-

在低温条件下使用 UASB 和 DHS 反应器处理低浓度废水 - 第 2 部分 -