Urban sewage treatment agent as well as preparation method and application thereof

• Main Authors: LIN WEIJIE, SU ZHILAI, XU JUNWEI, CHEN ZHIFENG, LU XIAOMING, FU QIAN, LIU YUNLONG, TANG YU, LIU WENTUO, PENG XUEJUN, DUAN LEI, HE LINYUN, ZHONG KANG, YANG XIBIN, XIE ZHIYONG, WANG HONGTAO, LING TAO, WU GANG, LUO SHIYUN, YIN LAIRONG, TONG CHANG
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2021
• 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 provides an urban sewage treatment agent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing modified diatomite; S2, preparing porous titanium dioxide hollow microspheres; S3, preparing porous titanium dioxide microspheres loaded with oxalic acid; S4, preparing a catalyst; S5, preparing porous titanium dioxide microspheres which are coated with polydopamine and are loaded with oxalic acid; S6, preparing bacterium-loaded composite microspheres; and S7, preparing the urban sewage treatment agent. According to the urban sewage treatment agent, polydopamine on the surfaces of the bacterium-loaded composite microspheres plays a role in purifying heavy metals in sewage, due to the porous hollow structures of the bacterium-loaded composite microspheres, oxalic acid can be loaded in capillary pore channels, an engineering bacterium agent enters the hollow spheres, the engineering bacterium agent and oxalic acid are slowly released