A kind of high-efficiency composite dephosphorization agent and preparation method thereof

Abstract

The invention discloses a high-efficiency compound phosphorus removal agent which consists of the following components in parts by mass: 80-100 parts of ferrous chloride, 20-50 parts of an antioxidant, 1-20 parts of a natural mineral powder, 10-20 parts of silica, 20-40 parts of a catalyst and 10-15 parts of a stabilizer. The high-efficiency compound phosphorus removal agent has obvious effect ofphosphorus removal, has the removal rate reaching 92% or more, has less drug dosage and relatively low treatment cost, has relatively strong purified water quality, has the ability to remove BOD, CODand heavy metal ions in water, and also has efficacies of decolorization, sulfur removal, oil removal, sludge dewatering and the like; a preparation process of the high-efficiency compound phosphorusremoval agent is simple; the price of the used ferrous chloride is low, byproducts of upstream industries can be used, and reduction of the cost of the compound phosphorus removal agent is facilitated.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a high-efficiency composite dephosphorization agent for removing phosphate ions in wastewater and a preparation method thereof. Background technique [0002] Phosphorus is one of the main elements needed for biological growth. In surface freshwater systems, phosphate is usually the limiting factor for plant growth. In normal freshwater systems, phosphorus content is usually limited. Once the phosphorus content exceeds a certain amount, the increased Phosphate will lead to excessive growth of plants, resulting in eutrophication of water bodies, rapid reproduction of algae and other plankton, a decrease in dissolved oxygen in water bodies, deterioration of water quality, and massive death of fish and other organisms, resulting in ecological imbalance. Industry, aquaculture and tourism have all come to great harm. [0003] In the actual industrial sewage an...

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Problems solved by technology

At present, there are some methods for phosphorus removal, such as the use of aluminum salt or calcium salt and phosphate ions in wastewater to form insoluble phosphate to remove, but the price of aluminum salt is high, and the operating cost is high, which is not suitable for large-scale and high-efficiency. Phosphorus removal, and calcium salt needs to be at a higher Ph to form a more stable precipitation and achieve a higher phosphorus removal efficiency. During the treatment process, the Ph value of the sewage needs to be adjusted to be alkaline, and the Ph value needs to be adjusted before discharge. Adjusting to neutral, this operation process needs to consume a certain amount of manpower and chemicals, which greatly increases the cost of labor and reagents

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