| abstract |
The invention relates to the technical field of sewage treatment, and specifically discloses a micro-expanded biological carrier and a preparation method and application thereof. The method for preparing a micro-expandable biological carrier of the present invention comprises: (1) mixing and reacting polyol and isocyanate; (2) mixing the reactant obtained in step (1) with auxiliary: superabsorbent resin, hydrophilic silicone oil and water (3) The mixture obtained in step (2) is mixed with a catalyst, and foamed and molded; wherein, the polyol is a mixture of polyether polyol YB-3010 and PTMEG. The micro-expandable biological carrier of the present invention is hydrophilic, slightly expands after entering water, has a large specific surface area, is naturally suspended in water, and has fast film-forming startup speed, is suitable for in-situ capacity expansion and upgrading of sewage treatment plants, and can increase sewage treatment capacity and removal efficiency. |