Method for improving methane yield by anaerobic enhanced treatment of high-concentration acidic organic wastewater

• Main Authors: LUO YUN, LIN YAN, LAN ZHICONG, WU XIN, GENG WENDA, HUANG ZHIWEI, YANG CHUNPING, ZHANG ZIYING, NIE WENKAI
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for improving methane yield by anaerobic enhanced treatment of high-concentration acidic organic wastewater. The method comprises the following steps: (1) selecting anaerobic sludge in a stably running anaerobic biological treatment system as inoculated sludge; (2) modifying ferroferric oxide by using chitosan, so as to prepare a ferroferric oxide (Cs-Fe3O4) microsphere modified by the chitosan; and (3) the Cs-Fe3O4 microsphere composite material is added into a reactor for anaerobic methanogenesis of the acidic high-concentration organic wastewater, the addition amount of the Cs-Fe3O4 microsphere composite material is 0.1-2.0% (mass percent), and the methanogenesis rate of the anaerobic reactor is increased by 40-140%. According to the method, the stability of the reactor can be improved and the generation of methane can be accelerated when the anaerobic bioreactor is acidified or acidic wastewater is treated. The method for improving anaerobic methanogenesis of the high-conc