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Buried Integrated Biofilter Process for Treatment of Rural Domestic Sewage

Tao Xue-jiang

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Abstract

The buried integrated biofilter process was used to treat rural domestic sewage. The carbon oxidation and nitrification were carried out through denitrification in pre-anoxic pond and enhanced oxygenation by ventilating and splashing. The pilot test results show that the average removal rates of COD, NH+4-N, TN and TP are 63.1%, 92.2%, 68.6% and 47.5% respectively. The effluent quality achieves the first class criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The process has characteristics of energy-saving, high efficiency and simple operation, thus it is suitable to be generalized in rural areas inhabited dispersedly.

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What this paper is about

The buried integrated biofilter process was used to treat rural domestic sewage. The carbon oxidation and nitrification were carried out through denitrification in pre-anoxic pond and enhanced oxygenation by ventilating and splashing. The pilot test results show that the average removal rates of COD, NH+4-N, TN and TP are 63.1%, 92.2%, 68.6% and 47.5% respectively. The effluent quality achieves the first class criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The process has characteristics of energy-saving, high efficiency and simple operation, thus it is suitable to be generalized in rural areas inhabited dispersedly.

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Available abstract

The buried integrated biofilter process was used to treat rural domestic sewage. The carbon oxidation and nitrification were carried out through denitrification in pre-anoxic pond and enhanced oxygenation by ventilating and splashing. The pilot test results show that the average removal rates of COD, NH+4-N, TN and TP are 63.1%, 92.2%, 68.6% and 47.5% respectively. The effluent quality achieves the first class criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The process has characteristics of energy-saving, high efficiency and simple operation, thus it is suitable to be generalized in rural areas inhabited dispersedly.

Key concepts: Biofilter, Effluent, Pollutant, Environmental science, Anoxic waters, Nitrification, Sewage treatment, Environmental engineering

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