Influence of different carriers on DMBR treating simulated domestic sewage
In order to investigate the influence of different carriers on DMBR treating simulated domestic sewage,150 mesh nylon net,200 mesh nylon net and activated carbon sponge were used as dynamic membrane carriers,and the changes of pollutants such as DOC,NH3-N and PO43-during the process of DMBR operation were measured;The time of formation of the dynamic membrane layer was judged by parameters of effluent water turbidity and TMP,and the EPS in the dynamic membrane layer was extracted and quantified.The results showed that,using nylon net and activated carbon sponge as carrier could improve the effluent water quality,the average removal rates of DOC and NH3-N were both above 97%,the removal rate of PO43-was above 90%;and the average effluent turbidity decreased to below 1.87 NTU.The turbidity and some other data showed that the dynamic membrane could be formed within 24 h when nylon net was used as carrier,and the activated carbon sponge was used as carrier with the formation time of the dynamic membrane less than 90 min,which showed a better retention effect.The results of EPS showed that PS was the main substance caused membrane fouling.
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万方数据
