Modified activated sludge-based two-compartment treatment method for processing nitrate-contaminated drinking water and the device thereof

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United States of America Patent

PATENT NO 9828271
SERIAL NO

14646561

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Abstract

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Disclosed is a modified activated sludge-based two-compartment treatment method for processing nitrate-contaminated drinking water. Raw water is firstly sent to a first TiO2-modified denitrifying activated sludge bioreactor (2), wherein organic carbon source is added in a controlled amount, and nitrate is partly reduced with nitrite being accumulated. Then, the effluent from the first bioreactor is sent to a second TiO2-modified denitrifying activated sludge bioreactor (3), wherein organic carbon source and hydrogen gas are supplemented, and remaining nitrate and accumulated nitrite are reduced to nitrogen gas. The denitrified effluent from the second bioreactor is sent to a settling tank (4), and TiO2-containing precipitates collected from the settling tank receive sequential alkaline and acidic treatment before being injected into the first bioreactor (2) for TiO2 recycling. The effluent from the settling tank (4), after having been subjected to ozone disinfection and activated carbon filtration, has suitable pH and bicarbonate alkalinity, and the concentrations of nitrate, nitrite and water soluble organics meet the safety standard for drinking water. Also disclosed is a modified activated sludge-based two-compartment treatment device for processing nitrate-contaminated drinking water.

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Patent Owner(s)

Patent OwnerAddress
SHENYANG INSTITUTE OF APPLIED ECOLOGY CHINESE ACADEMY OF SCIENCES110016 NO 72 WENHUA ROAD SHENHE DISTRICT LIAONING SHENYANG SHENYANG CITY LIAONING PROVINCE 110016

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Xin Liaoning, CN 816 7998
Huang, Bin Liaoning, CN 402 5548
Li, Jianlin Liaoning, CN 43 415
Shi, Yi Liaoning, CN 143 760

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