The MUCT-MBR process is a new type of anaerobic aerobic mixing process, which adopts multi-stage contact oxidation technology combined with MBR membrane technology, which can efficiently degrade nutrients such as organic matter and nitrogen and phosphorus. The purpose of this paper is to improve the operational efficiency and purification effect of the MUCT-MBR process by improving the effect of hydraulic retention time on the operational performance of the MUCT-MBR process.
The results show that the hydraulic retention time has a significant impact on the operational performance of the MUCT-MBR process. First of all, under a good anaerobic and aerobic alternating reaction, the appropriate long hydraulic retention time can promote the full degradation and transformation of nutrients such as organic matter and nitrogen and phosphorus. Since microorganisms such as nitrifying bacteria and Fusobacterium produced in the anaerobic biochemical tank will be brought into the aerobic biochemical tank, the absorption and transformation of organic matter and nutrients such as nitrogen and phosphorus will be realized through the biodegradation process.
The appropriate short hydraulic retention time can effectively reduce the sludge aging and extracellular product accumulation in the tank, and maintain sufficient space and significant biomass in the biochemical tank. The stability and lifetime of the MUCT-MBR process vary under different hydraulic retention time conditions. For short residence time, the flux in the MBR membrane increases, and the pressure through the membrane decreases, which greatly increases the flux of the MBR membrane and reduces the degree of scale inhibition of the membrane, but the reaction time is shorter in both the anaerobic biochemical tank and the aerobic biochemical tankOn the contrary, the long residence time can correct the good biological response to a certain extent, and improve the number and biological activity of microorganisms in the pool to the degradation ability of nutrients such as organic matter and nitrogen and phosphorus, but the flux and treatment efficiency are reduced.
In summary, the hydraulic retention time is an important parameter affecting the operational performance of the MUCT-MBR process. Proper hydraulic retention time optimizes process operation and has a significant effect on the degradation of nutrients such as organic matter and nitrogen and phosphorus. However, in practical application, the selection of appropriate hydraulic retention time needs to consider the actual situation and economic feasibility of the production process, and optimize and adjust according to different process parameters to achieve the optimal wastewater treatment effect.
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