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In order to verify the feasibility or reliability of gel-embedded nitrobacteria carriers and to obtain parameters for engineering application, the activation, stable operation condition and main impact factors of gel-embedded nitrobacteria carriers system were investigated.The result indicated that the activation time for the system of gel-embedded nitrobacteria carriers was no more than 15 d at room temperature (20-25°C).At stable operation stage, the system of gel-embedded nitrobacteria carriers to treat urban sewage can make an average of 2 mg/L ammonia nitrogen in the effluent and the removal rate of ammonia nitrogen was more than 95% under the low sludge concentration condition and dosing rate 7.95% and increasing water inflow.At last, the system' needed for gas to water is 7 : 1 eventually.

Gongye Shuichuli

Application of membrane process to coking wastewater reuse

Author: Mu, Mingming ; Zuo, Qing

Coking chem. industry has serious neg. impacts on the social environment and the regional development due to the high consumption of water, complex components of pollutants, serious environmental pollution, and some other features.With the implementation of the Emission Standard of Pollutants in Coking Chem. Industry(GB 16171-2012), the advanced treatment of coking wastewater has become a difficult problem which needs to be solved urgently.The paper focuses on the application of membrane process to the advanced treatment of coking wastewater.The one-year operation effect shows that this method has pretty good effects on the reuse of the biochem. treated coking wastewater.

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