The invention provides an electrochemical and anaerobic membrane combined biological
sewage treatment
plant and a treatment method thereof. The electrochemical and anaerobic membrane combined biological
sewage treatment
plant comprises a reaction tank in which a sacrificial
anode electrode, a non-sacrificial
anode electrode and a membrane module
cathode are disposed. The electrochemical and anaerobic membrane combined biological
sewage treatment
plant further comprises a power supply device. A positive
electrode of the power supply device is electrically and independently connected to the sacrificial
anode electrode and the non-sacrificial anode electrode, respectively, and a negative electrode of the power supply device is electrically connected to the membrane module
cathode. According to the present invention,
electrochemistry and an
anaerobic membrane bioreactor are combined, and pre-removal of pollutants, increase of
sludge size and
neutralization of
sludge surface charges are achieved through electroflocculation; pollutants are electrostatically repelled by means of an
electric field, and the morphology of a
filter cake layer is improved by a
hydrogen evolution reaction, achieving in-situ electrical cleaning of the
membrane surface; the activity of microorganisms is stimulated by the electric filed so as to increase the
metabolic rate of the microorganisms and promoting amethane yield. Moreover, pH decrease caused by metabolic
acid production by microorganisms is mitigated by
metal ions from electroflocculation.