Membrane Bioreactor (mbr) Treatment Of Monosodium Glutamate Wastewater Effects

Monosodium glutamate manufacturing wastewater has high organic substance and ammonia, which is the most difficult to deal with in industry wastewater. At present many monosodium glutamate manufacturing mill use conventional activated sludge system (CAS), but hard to reach the standard of discharged, polluting environment and wasting much water resource. Thereby, it is urgent to find effective method to treat monosodium glutamate manufacturing wastewater.The experiment use Membrane Bioreactor (MBR) to deal with MGM wastewater. The treatment object is effluent after anaerobic and aerobic treatment. Anglicizing performance of MBR techniques, compared with the present conventional activated sludge process. The article has researched the effect of hydraulic retention time (HRT) ,MLSS on the wastewater treatment result in the reactor. The stability of experimental facility was observed. According to the result, searching of the best parameter of MBR techniques. The result showed: the quality of MBR producting water is satisfied. MBR have the advantage over the CAS.The experiment has been divided two stages. In first stage, the anaerobic and aerobic producing water ware treatment by aerobic MBR. When treating aerobic producting water, the average COD and NH₄⁺-N removal efficiency was 85% and 52.8%. The COD influent was undulated, but the effluent of MBR was steady, so MBR has good anti-impact competence. The average COD removal efficiency of MBR and CAS was 88.6% and 69%; the average NH₄⁺-N removal efficiency of MBR and CAS was 69% and 21% respectively. High level NH₃-N concentration of influent, low level HRT and DO caused nitrite accumulation in the reactor.In the second stage, an anoxic tank was added in front of the aerobic MBR tank, and a RO system was added behind of MBR tank. In this stage, the average COD removal efficiency of MBR and CAS was 83.3% and 66.7%, the COD of RO producting water is in the range of 0-65mg/L(the average is 11mg/L); The NH₄⁺-N concentration of producting water of MBR had big changes. The average NH₄⁺-N removal efficiency of MBR is 66% and nitrite accumulation was partly resolved. The NH₄⁺-N concentration of RO producting water is in the range of 0-80mg/L (the average is 36mg/L).As a whole, MBR has good anti-impact ability for COD removal, and the NH₄⁺-N concentration of producting water was unsteady. When the system operated stably, the NH₄⁺-N removal efficiency can reach about 70%.The membrane fouling mechanism and cleaning methods have been introduced in the article, and the membrane fouling status and cleaning result in this experiment have been studied.