Hybrid municipal wastewater treatment system for recovering the reclaimed water and phosphorous resource

回收中水和磷资源的混合市政污水处理系统

基本信息

批准号：
14205077
负责人：
WATANABE Yoshimasa
金额：
$ 25.04万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

A novel membrane Bioreactor(MBR) in which nitrification and denitrification simultaneously proceed in a single reaction chamber has been proposed for advanced municipal wastewater treatment. Anoxia/aerobic conditions are separately created in the proposed MBR by inserting baffles inside of the membrane chamber and consequently simultaneous nitrification/denitriication can be carried out. The technology established in this study can easily be applied to almost all of existing MBR's. Pilot-scale experiment to examine performance of the proposed MBR was carried out at an existing municipal wastewater treatment plant. Inserting baffles inside the membrane chamber actually increased removal of nitrogen by 30%.In order to evaluate the reclaimed water quality, new method for detecting the indicator microorganisms. Molecular microbiological procedures such as T-RFLP and Real-Time PCR areused to detect the both bacteria. We can distinguish their original among human, cow and pig. We have succes … More sfully applied the new method in Toyohira River basin. Ortho-phosphate ion in aqueous solution could be effectively trapped in the zirconium sulfate-surfactant micelle mesostructure (ZS). The reaction proceeded through anion exchange between HSO_4-and OH-in ZS and HPO_3-. Maximum sorption capacity of ZS for HPO3-was330 μmol/gZS. This value is 1.6 times higher than the existing best sorbent. The microbial community structure of a pilot-scale conventional membrane bioreactor (CMBR), hybrid MBR (HMBR) and a full-scale activated sludge (AS) process, treating the same municipal wastewater, were analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and fluorescence in situ hybridization (FISH) techniques. Both techniques demonstrated that the HMBR supported a significantly different microbial community structure comparing with the CMBR and with that of a full-scale AS process. FISH analysis revealed also that the population of Chloroflexi bacteria (formerly known as green nonsulfur bacteria), in the CMBR was four times greater than the HMBR and two times greater than the AS process. Less

提出了一种新型膜生物反应器（MBR），其中硝化和反硝化在单个反应室中同时进行，用于先进的城市废水处理，通过在膜室内插入挡板，从而同时在所提出的 MBR 中创建缺氧/好氧条件。本研究中建立的技术可以轻松应用于几乎所有现有的 MBR 中试规模实验，以检验所提出的 MBR 的性能。在现有的城市污水处理厂中，在膜室内插入挡板实际上使氮去除率提高了 30%。为了评估再生水的质量，采用了检测分子微生物程序（如 T-RFLP）的新方法。并使用实时PCR来检测这两种细菌，我们已在丰平河流域成功应用了新方法。水溶液中的离子可以被有效地捕获在硫酸锆-表面活性剂胶束介观结构(ZS)中，该反应通过ZS中的HSO_4-和OH-与HPO_3-之间的阴离子交换进行，ZS对HPO3-的最大吸附容量为330 μmol/gZS。该值比现有最好的常规吸附剂的微生物群落结构高出1.6倍。通过聚合酶链反应-变性梯度凝胶电泳（PCR-DGGE）和荧光原位杂交对处理相同城市废水的膜生物反应器（CMBR）、混合MBR（HMBR）和全规模活性污泥（AS）工艺进行了分析(FISH) 技术表明，与 CMBR 相比，HMBR 支持显着不同的微生物群落结构，并且与全面的 FISH 分析相比，还显示了微生物群落结构。 CMBR 中的 Chloroflexi 细菌（以前称为绿色非硫细菌）比 HMBR 多四倍，比 AS 工艺多两倍。