Method for dosing microbial carrier into MBR membrane bioreactor

Abstract

The invention relates to a method for dosing a microbial carrier into an MBR membrane bioreactor. The method is characterized by comprising the following steps: dosing powdered activated carbon havinga grain size of about 200 meshes into an aeration oxidation pond of the MBR membrane reactor with a dosage being 0.5-1.5 percent of the volume of the pond body; dosing activated sludge for inoculating after uniform mixing of aeration, and performing conventional cultivation domestication to enable the activated sludge to reach a balance period; and strictly controlling the concentration of the activated sludge in the aeration pond as 6000-8000mg / L by a mode of discharging residual sludge in the system running process to stably run the system. Compared with high sludge concentration of a conventional MBR system, the method has the advantages that since the sludge concentration is controlled to be relatively lower, the oxygen demand of the whole aeration pond can be reduced, and the energyconsumption is reduced.

Description

technical field [0001] The invention relates to the technical field of MBR membrane bioreactors, in particular to a method for adding microbial carriers to MBR membrane bioreactors. Background technique [0002] At this stage, there are many industrial wastewater using MBR membrane bioreactors. It has been generally recognized that MBR can effectively improve the treatment efficiency of wastewater, but conventional MBR reactors also have certain technical defects: [0003] 1. Due to the limitation of the membrane pore size, the effluent of the MBR system cannot intercept many soluble macromolecular substances in the wastewater, which can be seen from the obvious chroma of the effluent; [0004] 2. The technical feature of MBR is to improve the treatment efficiency by continuously increasing the MLSS in the aeration tank, but it will easily cause membrane fouling problems because the sludge concentration in the system is too high; [0005] 3. Due to the relatively high conce...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the limitation of the membrane pore size, the effluent of the MBR system cannot intercept many soluble macromolecular substances in the wastewater, which can be seen from the obvious chroma of the effluent;

[0004] 2. The technical feature of MBR is to improve the treatment efficiency by continuously increasing the MLSS in the aeration tank, but it will easily cause membrane fouling problems because the sludge concentration in the system is too high;

[0005] 3. Due to the relatively high concentration of sludge in the MBR system, the oxygen demand of microorganisms is also relatively high when treating wastewater, so the amount of aeration required by the conventional activated sludge method is also relatively large, which increases energy consumption virtually.

Images