Novel sewage dephosphorizing agent as well as preparation method and application method thereof

Abstract

The invention discloses a novel sewage dephosphorizing agent as well as preparation and application methods thereof, the novel sewage dephosphorizing agent is a composite product of ferric trichloride, calcium hydroxide, zirconium-based montmorillonite and polyaluminium chloride, and the preparation method comprises the following steps: adding ferric trichloride into water to obtain a ferric saltsolution; adding calcium hydroxide into the iron salt solution to obtain an iron-calcium salt mixed solution; adding zirconium-based montmorillonite into the iron-calcium salt mixed solution, and stirring to fully disperse the iron-calcium salt mixed solution to obtain an iron-calcium-zirconium modified montmorillonite mixed solution; dissolving polyaluminium chloride into the iron-calcium-zirconium modified mineral material mixed solution, and uniformly stirring and mixing so as to obtain the product. The novel sewage dephosphorizing agent is prepared by compounding ferric trichloride, calcium hydroxide, zirconium-based montmorillonite and polyaluminum chloride by adopting a combination and mutual matching method, and has the advantages of simple preparation process, easiness in operation, excellent phosphorus control effect, stability, low operation cost and the like.

Description

technical field [0001] The invention belongs to the field of phosphorus pollution treatment of water bodies, and in particular relates to a novel sewage phosphorus removal agent and its preparation and application method. Background technique [0002] With the active promotion of ecological restoration actions, among the indicators of chemical oxygen demand, ammonia nitrogen, and total phosphorus of pollutants, total phosphorus has become an important pollution indicator of water bodies. Phosphorus is a key limiting factor of water eutrophication. Excessive input of phosphorus will cause water transparency to decrease, dissolved oxygen to decrease, water quality to deteriorate, and cause serious harm to aquatic ecosystems and human health. For example, long-term drinking of phosphorus-containing water can lead to osteoporosis and osteonecrosis of the jaw. At this stage, the situation of phosphorus treatment in sewage in my country is still severe, and the phosphorus content...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a novel sewage dephosphorization agent and its preparation and application method to solve the problems of high cost of water body phosphorus pollution control, poor control effect, instability, impact and destruction of ecology, and difficulty in effectively controlling sewage. Technical Problems of Reaching Standards of Phosphorus Discharge in China

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