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Pilot-scale Test of Anaerobic Hybrid Reactor for Pretreatment of Low-temperature Combined Municipal Sewage

Min Tze Wu

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Abstract

Anaerobic hybrid reactor(AHR) with an effective volume of 18.55 m3 was used to treat low-strength and low-temperature combined municipal sewage.The pilot-scale experiment results show that the removal rates of SS and COD attain 84.5% and 36.13% respectively when the hydraulic retention time(HRT) is 3.9 hours and the temperature is between 9.5 ℃ and 12 ℃.The proportion of SCOD in total COD increases from 49.69% in the influent to 73.08% in the effluent,and the biodegradability is improved.When the ratio of COD/SO2-4 is 1.60 which means that SO2-4 is abundant,sulfate-reducing bacteria(SRB) are more predominant than methane-producing bacteria(MPB) and the removal rate of SO2-4 attains 73.26%.Therefore,it can be concluded that AHR is suitable for pretreatment of low-temperature combined municipal sewage.

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What this paper is about

Anaerobic hybrid reactor(AHR) with an effective volume of 18.55 m3 was used to treat low-strength and low-temperature combined municipal sewage.The pilot-scale experiment results show that the removal rates of SS and COD attain 84.5% and 36.13% respectively when the hydraulic retention time(HRT) is 3.9 hours and the temperature is between 9.5 ℃ and 12 ℃.The proportion of SCOD in total COD increases from 49.69% in the influent to 73.08% in the effluent,and the biodegradability is improved.When the ratio of COD/SO2-4 is 1.60 which means that SO2-4 is abundant,sulfate-reducing bacteria(SRB) are more predominant than methane-producing bacteria(MPB) and the removal rate of SO2-4 attains 73.26%.Therefore,it can be concluded that AHR is suitable for pretreatment of low-temperature combined municipal sewage.

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Available abstract

Anaerobic hybrid reactor(AHR) with an effective volume of 18.55 m3 was used to treat low-strength and low-temperature combined municipal sewage.The pilot-scale experiment results show that the removal rates of SS and COD attain 84.5% and 36.13% respectively when the hydraulic retention time(HRT) is 3.9 hours and the temperature is between 9.5 ℃ and 12 ℃.The proportion of SCOD in total COD increases from 49.69% in the influent to 73.08% in the effluent,and the biodegradability is improved.When the ratio of COD/SO2-4 is 1.60 which means that SO2-4 is abundant,sulfate-reducing bacteria(SRB) are more predominant than methane-producing bacteria(MPB) and the removal rate of SO2-4 attains 73.26%.Therefore,it can be concluded that AHR is suitable for pretreatment of low-temperature combined municipal sewage.

Key concepts: Effluent, Hydraulic retention time, Sewage, Hybrid reactor, Biodegradation, Chemistry, Anaerobic exercise, Pulp and paper industry

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