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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Process efficiency and microbial monitoring in MBR (membrane bioreactor) and CASP (conventional activated sludge process) treatment of tannery wastewater
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Process efficiency and microbial monitoring in MBR (membrane bioreactor) and CASP (conventional activated sludge process) treatment of tannery wastewater

机译：MBR（膜生物反应器）和CASP（常规活性污泥法）处理制革废水的过程效率和微生物监测

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摘要

In this study a pilot-scale membrane bioreactor (MBR) and a conventional activated sludge plant (CASP), treating the same tannery wastewaters and in the same operating conditions, have been compared in order to evaluate the overall treatment efficiency, the presence and distribution of Gram negative bacteria and the kinetics of nitrifying bacteria. Process efficiency was evaluated in terms of organic and nitrogen compounds: the MBR showed a higher COD removal (+4%) and a more stable and complete nitrification. The Gram negative bacteria were detected by fluorescent in situ hybridization (FISH) with phylogenetic probes monitoring of alpha-, beta- and gamma-Proteobacteria, of the main ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria of the Nitrobacter and Nitrospira genera. The results showed that the main differences between the two sludges were: the higher abundance of alpha- and gamma-Proteobacteria in the MBR bioreactor and the presence of AOB aggregates only on the surfaces of MBR flocs. Finally, the titrimetric (pH-stat, DO-stat) tests showed similar values of the kinetic parameters of the nitrifiers both in MBR and CASP sludge. (c) 2008 Elsevier Ltd. All rights reserved.
机译：在这项研究中，比较了中试规模的膜生物反应器（MBR）和常规活性污泥装置（CASP），它们在相同的操作条件下处理相同的制革废水，以评估总体处理效率，存在和分布革兰氏阴性细菌和硝化细菌的动力学。根据有机和氮化合物评估了工艺效率：MBR显示出更高的COD去除率（+ 4％）和更稳定和完全的硝化作用。通过荧光原位杂交（FISH）和系统发育探针检测革兰氏阴性细菌，该探针监测硝化细菌和硝化螺旋菌属的主要氨氧化细菌（AOB）和亚硝酸盐氧化细菌的α-，β-和γ-变形杆菌。结果表明，两种污泥之间的主要区别在于：MBR生物反应器中α-和γ-Proteobacteria的丰度更高，而MBR絮凝物表面仅存在AOB聚集体。最后，滴定法（pH值，DO值）测试表明，MBR和CASP污泥中硝化器动力学参数的值相似。 （c）2008 Elsevier Ltd.保留所有权利。

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