Domestic sewage treatment method

• Main Authors: TANG WENYAN, LIU XIN, LIU GUANGSHI, WANG XIAOGANG, LI JIN, GONG YONGLING, WANG ZHONGYANG, LIU YUANHONG
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a domestic sewage treatment method, which belongs to the technical field of sewage treatment, and comprises the following steps: carrying out anaerobic fermentation on black water to generate biogas, biogas residue and waste liquid, injecting pretreated grey water and waste liquid into a sedimentation tank, firstly adding a composite flocculant into the sedimentation tank, stirring, then adding quartz sand components, filtering supernate by using a sand filter, and collecting the supernate; primary treatment wastewater is obtained; the primary treatment wastewater is transported into a photoelectrocatalytic oxidation integrated device, a composite photocatalyst is added into the photoelectrocatalytic oxidation integrated device, and dischargeable water is obtained after treatment is ended. Control is conducted from the source, black water in the domestic sewage is treated in a targeted mode, biogas and biogas residues for production and living of people are generated, and the wastewate