Method for treating rural domestic sewage by utilizing denitrifying phosphate-accumulating organisms and invigorated artificial wetland

• Main Authors: HU WENRONG, LI ZHENG, PEI HAIYAN, SHAO YUANYUAN, MENG PANPAN
• Format: Patent
• Language: Chinese; English
• Published: 31.10.2012
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method for treating rural domestic sewage by utilizing denitrifying phosphate-accumulating organisms and invigorated artificial wetland. Denitrification phosphate-accumulating bacteria liquid activated by culturing is added to a reed artificial wetland, the hydraulic retention time of sewage in a subsurface-flow artificial wetland is 7-9 days. According to the invention, the invigorating effect of microorganisms to the wetland is enhanced by the denitrification phosphate-accumulating bacteria added to the wetland system, so that the removal rate of nitrogen and phosphorus in sewage is effectively improved. Reed with rhizospheric microorganisms is adopted as the wetland plant and has good removal effect on organics, nitrogen and phosphorus. With the adoption of the method, the sewage treatment effect is better, and the content indexes of COD (Chemical Oxygen Demand), ammonia nitrogen and total phosphorus of effluent water ontained from rural domestic sewage treated by the artifical w