Advantages: according to what you said, to reduce COD from 2000mg/l to 60 or less, that is, need to do a discharge standard, MBR is mainly to assist in improving the effectiveness of biological systems, connected to the activated sludge method, you can adjust the whole system, easy to achieve the goal and easy to control, the advantage is that the investment is a little smaller, do not need to buy the installation of filler, the disadvantage is that the control The disadvantage is that the control is more delicate, there is sludge reflux, control of dissolved oxygen, to prevent the common problems of activated sludge method.

2, in front of the contact oxidation method.

As long as the control is appropriate, the effluent water quality has no effect, but because the MBR effluent water quality is limited to the effect of biological systems, because the front is the contact oxidation method, MBR membrane sludge does not need to reflux to the front section, the activated sludge gathered in the MBR tank, the biological system of the auxiliary role of a relatively small, contact oxidation method of water quality fluctuations in the water is good, but the investment in filler is large and every three to five years, you need to change the filler, construction difficulties, and the water quality is not good. Need to change the filler, construction difficulties.