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2007•Acta Scientiarum Naturalium Universitatis SunyatseniRequires access

Low Concentration Domestic Wastewater Treated by an UASB Reactor at Psychrophilic Temperature

Jing Zhang

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Abstract

The performance and the sludge characteristics of an upflow anaerobic sludge blanket (UASB) reactor were investigated for the treatment of low concentration (COD 400~600 mg·L-1) domestic wastewater at psychrophilic temperature (15±1℃). The laboratory-scale UASB reactor of 2.0L of useful volume was operated for a period of 174 days. An organic loading rate of around 3.0kg·m-3d-1was treated with a 30%~50% COD removal rate. The characteristics of sludge in UASB reactor were changed. Granular sludge has been obtained in the reactor and was well settelable. The SEM photoes of the sludge during the experiment showed that filamentous bacterium and bacillus were key organisms.

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What this paper is about

The performance and the sludge characteristics of an upflow anaerobic sludge blanket (UASB) reactor were investigated for the treatment of low concentration (COD 400~600 mg·L-1) domestic wastewater at psychrophilic temperature (15±1℃). The laboratory-scale UASB reactor of 2.0L of useful volume was operated for a period of 174 days. An organic loading rate of around 3.0kg·m-3d-1was treated with a 30%~50% COD removal rate. The characteristics of sludge in UASB reactor were changed. Granular sludge has been obtained in the reactor and was well settelable. The SEM photoes of the sludge during the experiment showed that filamentous bacterium and bacillus were key organisms.

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Available abstract

The performance and the sludge characteristics of an upflow anaerobic sludge blanket (UASB) reactor were investigated for the treatment of low concentration (COD 400~600 mg·L-1) domestic wastewater at psychrophilic temperature (15±1℃). The laboratory-scale UASB reactor of 2.0L of useful volume was operated for a period of 174 days. An organic loading rate of around 3.0kg·m-3d-1was treated with a 30%~50% COD removal rate. The characteristics of sludge in UASB reactor were changed. Granular sludge has been obtained in the reactor and was well settelable. The SEM photoes of the sludge during the experiment showed that filamentous bacterium and bacillus were key organisms.

Key concepts: Psychrophile, Blanket, Wastewater, Pulp and paper industry, Chemistry, Environmental science, Sewage treatment, Waste management

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