The soluble microbial products （SMP） in the biological treatment effluent are generally of great amount and are poorly biodegradable. Focusing on the biodegradation of anaerobic SMP, the biological activated carbon ...The soluble microbial products （SMP） in the biological treatment effluent are generally of great amount and are poorly biodegradable. Focusing on the biodegradation of anaerobic SMP, the biological activated carbon （BAC） was introduced into the anaerobic system. The experiments were conducted in two identical lab-scale up-flow anaerobic sludge blanket （UASB） reactors. The high strength organics were degraded in the first UASB reactor （UASB1） and the second UASB （UASB2, i.e., BAC） functioned as a polishing step to remove SMP produced in UASB1. The results showed that 90% of the SMP could be removed before granular activated carbon was saturated. After the saturation, the SMP removal decreased to 60% on the average. Analysis of granular activated carbon adsorption revealed that the main role of SMP removal in BAC reactor was biodegradation. A strain of SMP-degrading bacteria, which was found highly similar to Klebsiella sp., was isolated, enriched and inoculated back to the BAC reactor. When the influent chemical oxygen demand （COD） was 10,000 mg/L and the organic loading rate achieved 10 kg COD/（m 3 ·day）, the effluent from the BAC reactor could meet the discharge standard without further treatment. Anaerobic BAC reactor inoculated with the isolated Klebsiella was proved to be an effective, cheap and easy technical treatment approach for the removal of SMP in the treatment of easily-degradable wastewater with COD lower than 10,000 mg/L.展开更多
China has been experiencing fast economic development in recent decades at the cost of serious environ-mental deterioration.Wastewater discharge,especially municipal wastewater discharge,and non-point pollution source...China has been experiencing fast economic development in recent decades at the cost of serious environ-mental deterioration.Wastewater discharge,especially municipal wastewater discharge,and non-point pollution sources are becoming the major water pollution source and research focus.Great efforts have been made on water pollu-tion control and a number of renovated technologies and pro-cesses for municipal wastewater treatment and reclamation as well as non-point pollution control have been developed and applied in China.This paper discusses the development and application of the appropriate technologies,including natural treatment systems,anaerobic biological treatment,biofilm reactors and wastewater reclamation technologies,for water pollution control in the country.展开更多
基金supported by the National Natural Science Foundation of China (No. 50808121)the Program for New Century Excellent Talents in University (No. NCET-11-0320)
文摘The soluble microbial products （SMP） in the biological treatment effluent are generally of great amount and are poorly biodegradable. Focusing on the biodegradation of anaerobic SMP, the biological activated carbon （BAC） was introduced into the anaerobic system. The experiments were conducted in two identical lab-scale up-flow anaerobic sludge blanket （UASB） reactors. The high strength organics were degraded in the first UASB reactor （UASB1） and the second UASB （UASB2, i.e., BAC） functioned as a polishing step to remove SMP produced in UASB1. The results showed that 90% of the SMP could be removed before granular activated carbon was saturated. After the saturation, the SMP removal decreased to 60% on the average. Analysis of granular activated carbon adsorption revealed that the main role of SMP removal in BAC reactor was biodegradation. A strain of SMP-degrading bacteria, which was found highly similar to Klebsiella sp., was isolated, enriched and inoculated back to the BAC reactor. When the influent chemical oxygen demand （COD） was 10,000 mg/L and the organic loading rate achieved 10 kg COD/（m 3 ·day）, the effluent from the BAC reactor could meet the discharge standard without further treatment. Anaerobic BAC reactor inoculated with the isolated Klebsiella was proved to be an effective, cheap and easy technical treatment approach for the removal of SMP in the treatment of easily-degradable wastewater with COD lower than 10,000 mg/L.
文摘China has been experiencing fast economic development in recent decades at the cost of serious environ-mental deterioration.Wastewater discharge,especially municipal wastewater discharge,and non-point pollution sources are becoming the major water pollution source and research focus.Great efforts have been made on water pollu-tion control and a number of renovated technologies and pro-cesses for municipal wastewater treatment and reclamation as well as non-point pollution control have been developed and applied in China.This paper discusses the development and application of the appropriate technologies,including natural treatment systems,anaerobic biological treatment,biofilm reactors and wastewater reclamation technologies,for water pollution control in the country.
