The performance of an anaerobic sequencing batch biofilm reactor treating domestic sewage colonized by anoxygenic phototrophic bacteria

被引：27

作者：

Sarti, A ^{[1
]}

Pozzi, E ^{[1
]}

Chinalia, FA ^{[1
]}

Zaiat, M ^{[1
]}

Foresti, E ^{[1
]}

机构：

[1] Univ Sao Paulo, Sch Engn Sao Carlos, Dept Hydraul & Sanitat, BR-13566590 Sao Carlos, Brazil

来源：

CHEMOSPHERE | 2006年 / 62卷 / 09期

基金：

巴西圣保罗研究基金会;

关键词：

anaerobic process; anoxygenic phototrophic bacteria; anaerobic sequencing batch biofilm reactor (ASBBR); polyurethane foam; attached biofilm;

D O I：

10.1016/j.chemosphere.2005.06.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

There are few reports on morphological characterization of microbial population colonizing anaerobic bioreactors and the aim of this work was to access such variable in an anaerobic sequencing batch biofilm reactor treating the University of Sao Paulo (Sao Carlos city, Brazil) domestic sewage. This pilot-scale reactor (1.2 m(3)) has been treating 0.65 m(3) of liquid waste under cycles of 8 h. The ASBBR has the distinct characteristics of being filled with support material for biomass attachment with the aim of skipping the sedimentation phase during the operational cycles, as it is commonly observed in anaerobic sequencing batch reactors (ASBR). Physical, chemical and physico-chemical variables were accessed in the influent and in the effluent for performance evaluation. Microbial characterization was made by means of direct microscopy and samples were taken over 150 d with a 25 d period interval. The ASBBR attained approximately 60% of COD removal efficiency. Microscopic analysis of biomass showed the presence of anoxygenic phototrophic bacteria probably influencing the ASBBR performance in the domestic sewage treatment. It is very likely that the exclusion of phototrophic sulfur bacteria by efficiently restraining the light would enhance the bioreactor efficiency. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1437 / 1443

页数：7