Device for processing wastewater with multi-chamber hydrolyzation-compound film biological process

The utility model relates to apparatus and method for treating refractory wastewater by hydrolysis-composite membrane biological method. The apparatus comprises: a multi-grid hydrolysis reactor (1) and a composite membrane bioreactor (2). The treating method comprises: anaerobic hydrolysis: introducing wastewater into the multi-grid hydrolysis reactor (1) through a water inlet pipe (1-8), hydrolyzing in an anaerobic condition, and controlling the reaction process at hydrolytic stage; aerobic degradation/membrane separation: introducing wastewater treated with anaerobic hydrolysis by the multi-grid hydrolysis reactor (1) into a contact oxidation region (2-1) of the composite membrane reactor (2), and performing aerobic biological treatment; introducing wastewater treated by the contact oxidation region (2-1) into a membrane separation region (2-2) of the composite membrane bioreactor (2), and performing further aerobic biological treatment; returning partial of the settling sludge produced in the multi-grid hydrolysis reactor (1) and the composite membrane bioreactor (2) to a flow-guide region (1-1) of the multi-grid hydrolysis reactor (1).