Study on application of cyclic reoxygenation biofilm process in rural decentralized sewage treatment
For the treatment of decentralized domestic sewage in rural areas,we put forward a new type of sewage treatment process named integrated cyclic reoxygenation biofilm process,with an intelligent management and control platform,to develop an intelligent management mode of de-centralized rural sewage treatment facilities.The influence of the key parameter of the cyclic reoxy-genation ratio on the operation effect of the process was explored by laboratory test.In the single household scenario,the removal rates of COD and NH3-N by experimental equipment are as high as 72.4％and 75.4％,respectively.It can also meet the rural domestic sewage discharge standards under the condition of high ammonia nitrogen inflow.In the multi household scenario,the effluent COD,NH3-N and TN are respectively 13～38 mg/L,0.4～4.8 mg/L and 1.8～7.2 mg/L,which can stably reach the standard of Hainan Province.The average removal rate of TP without dosing is 59.8％.The intelligent management mode has also been validated.The research shows that the integrated cyclic reoxygenation biofilm process has the characteristics of low cost,convenience for maintenance,and strong resistance to water quantity and water quality impact.It can adapt to a variety of complex scenarios.
Rural domestic sewageDecentralized treatmentCyclic reoxygenationBiofilm processIntelligent operation and maintenance
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维普
