Cathode load self-generated dynamic membrane bioreactor

Abstract

The invention relates to a cathode load self-generated dynamic membrane bioreactor which comprises a biological treatment system, a cathode load system and an automatic control system. The biological treatment system comprises a water inlet pump, a perforated aeration pipe, an aeration pump, a dynamic membrane module and a water outlet pipe; the aeration pump is connected with the perforated aeration pipe; the perforated aeration pipe is arranged under the dynamic membrane module; and water collection port on the upper end of the dynamic membrane module is connected with the water outlet pipe. The cathode load system comprises a direct-current voltage-stabilizing power supply, an electrode plate and a cathode load interface, wherein the anode outputted by the direct-current voltage-stabilizing power supply is connected with an electrode plate, and the cathode outputted by the direct-current voltage-stabilizing power supply is connected with the cathode load interface. The automatic control system comprises a liquid level controller and a time relay, wherein the liquid level signal outputted by the liquid level controller is used for controlling the water inlet pump to start and adjusting the water inlet amount, and the time relay is connected with the direct-current voltage-stabilizing power supply and used for controlling the electroflocculation running time. Due to the adoption of the cathode load self-generated dynamic membrane bioreactor, the stable operation cycle of the dynamic membrane is prolonged significantly.

Description

technical field [0001] The patent of the invention belongs to a kind of water treatment technology, more precisely, it belongs to a self-generated dynamic membrane reaction device for prolonging the stable operation period of the membrane, and relates to a cathode-loaded self-generated dynamic membrane bioreactor. Background technique [0002] Autogenous dynamic membrane bioreactor (DMBR) is a sewage treatment process that combines dynamic membrane separation technology with activated sludge process. Compared with membrane bioreactors (MBR) with microfiltration or ultrafiltration membranes as components, this process has the advantages of low cost of membrane components, large effluent flux, and low energy consumption. Therefore, DMBR is used in waste water recycling and reclaimed water reuse. It has received widespread attention at home and abroad. However, the short running period and frequent backwashing of the DMBR process due to membrane fouling have seriously affected...

AI Technical Summary

Problems solved by technology

However, the DMBR process has problems such as short operating period and frequent backwashing due to membrane fouling, which seriously affects the stability and economy of the process, and is currently the bottleneck problem for the further promotion and application of the process.

[0003] Aiming at the existing problems of DMBR, many researchers have made various improvements. The main measures are: (1) Increase the aeration rate to obtain a higher cross-flow velocity and reduce the resistance of the mud cake layer; however, this method On the one hand, the energy consumption of the system is increased, and on the other hand, the stability of the effluent is deteriorated; (2) Chemical agents are added to the reactor to strengthen the bioflocculation behavior and increase the porosity of the dynamic membrane; however, for complex biological systems, This method is complicated to operate in actual operation, which may cause instability of biochemical treatment

Images