System for treating sludge by rotary electrodes in combination with flat sheet membrane

Abstract

The invention discloses a system for treating sludge by rotary electrodes in combination with a flat sheet membrane. The system comprises a membrane treatment sludge reactor, an aeration device, a cathode membrane assembly, a first anode and a second anode, anode rotation control devices and a circuit control device, wherein the aeration device is arranged at the bottom inside the membrane treatment sludge reactor, the cathode membrane assembly is arranged inside the membrane treatment sludge reactor and located above the aeration device, the first anode and the second anode are both arranged inside the membrane treatment sludge reactor and located at both sides of the cathode membrane assembly, the anode rotation control devices are respectively arranged inside the first anode and the second anode and electrically connected with the first anode and the second anode and the circuit control device is respectively electrically connected with the first anode, the second anode and the cathode membrane assembly. According to the system disclosed by the invention, by applying an electric field in sludge, the cathode membrane assembly contamination is reduced; by use of anode electrochemical and electro flocculation technologies, the digestion efficiency of sludge and the effluent quality are improved; the deposition of sludge and microorganism is prevented by virtue of the rotation of anodes, the effective electric field strength is maintained and the dewatering performance of sludge is improved.

Description

technical field [0001] The invention relates to a system for treating sludge with a rotating electrode coupled with a flat membrane, which can control the degree of pollution of the membrane and improve the quality of effluent water, belongs to the field of sludge treatment, and is suitable for the technology of membrane separation and treatment of sludge. Background technique [0002] Membrane separation technology is used in the sludge treatment process. It mainly uses small-pore membranes to intercept sludge and macromolecular substances, and the water and small molecular substances that can pass through the membrane are driven by pressure to separate the sludge solution. At the same time The aerobic environment enhanced by the aeration in the reactor is used to carry out aerobic digestion of the sludge, so as to achieve the purpose of concentration and digestion of the sludge. [0003] Compared with the traditional gravity concentration process, the membrane separation s...

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Problems solved by technology

[0006] However, due to the particularity of sludge treatment by membrane separation technology (the sludge concentration is greater than 40 g / L, which is much higher than the sludge concentration of about 10 g / L in general membrane bioreactors), it was found during the experimental operation that the electrode surface A large amount of sludge flocs will be attached, increasing the electrode resistance, and as the operating time increases, the sludge attached to the electrode will gradually increase, so the electrode resistance will gradually increase

The increase of electrode resistance will weaken the electric field strength and affect the effect of external electric field control membrane fouling technology

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