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Study on Two-stage MBBR for Advanced Treatment of Domestic Sewage with High Ammonia Nitrogen

Dan Wang

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Abstract

Two-stage moving bed biofilm reactor(MBBR) was used for advanced treatment of domestic sewage with high ammonia nitrogen.The influence of HRT and air/water ratio on the pollutant removal efficiency was investigated.The results show that when the total HRT is 8 h,the air/water ratio of MBBR1 is 25 ∶1,and the aeration rate of MBBR2 is 280 L/h,the effluent COD and ammonia nitrogen are about 45 mg/L and less than 5 mg/L,and their average removal rates are 65% and 95% respectively,meeting the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).Moreover,the simultaneous nitrification and denitrification exists in the reactor,and the removal rate of TN is about 30%.

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What this paper is about

Two-stage moving bed biofilm reactor(MBBR) was used for advanced treatment of domestic sewage with high ammonia nitrogen.The influence of HRT and air/water ratio on the pollutant removal efficiency was investigated.The results show that when the total HRT is 8 h,the air/water ratio of MBBR1 is 25 ∶1,and the aeration rate of MBBR2 is 280 L/h,the effluent COD and ammonia nitrogen are about 45 mg/L and less than 5 mg/L,and their average removal rates are 65% and 95% respectively,meeting the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).Moreover,the simultaneous nitrification and denitrification exists in the reactor,and the removal rate of TN is about 30%.

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Available abstract

Two-stage moving bed biofilm reactor(MBBR) was used for advanced treatment of domestic sewage with high ammonia nitrogen.The influence of HRT and air/water ratio on the pollutant removal efficiency was investigated.The results show that when the total HRT is 8 h,the air/water ratio of MBBR1 is 25 ∶1,and the aeration rate of MBBR2 is 280 L/h,the effluent COD and ammonia nitrogen are about 45 mg/L and less than 5 mg/L,and their average removal rates are 65% and 95% respectively,meeting the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).Moreover,the simultaneous nitrification and denitrification exists in the reactor,and the removal rate of TN is about 30%.

Key concepts: Effluent, Moving bed biofilm reactor, Sewage treatment, Sewage, Pollutant, Chemistry, Aeration, Nitrification

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Study on Two-stage MBBR for Advanced Treatment of Domestic Sewage with High Ammonia Nitrogen — Research Paper | ScholarLens