Composite phosphorus removal agent for sewage treatment and preparation method of composite phosphorus removal agent

Abstract

The invention discloses a composite phosphorus removal agent for sewage treatment and a preparation method of thecomposite phosphorus removal agent. The composite phosphorus removal agent is formed by mixing a phosphorus removal agent A and a phosphorus removal agent B. The phosphorus removal agent A is composed of sugar, sodium carbonate, magnesium salt, calcium salt and the balance water. The phosphorus removal agent B comprises ferric chloride, copper sulfate, polydiallyldimethylammonium chloride, coagulant aids, polyferric sulfate, ferrous sulfate, aluminum sulfate, polyaluminum chloride, sodium aluminate, lime, caustic soda flakes, a stabilizer and the balance of water, sugar in the phosphorus removal agent A is any one of glucose and white sugar, magnesium salt in the phosphorus removal agent A is magnesium chloride, and the component of the calcium salt is calcium chloride. According to the composite phosphorus removal agent for sewage treatment and the preparation method of the composite phosphorus removal agent, the flocculate index in the sewage treatment process can be adjusted according to the discharge requirement of treated sewage, the sewage treatment efficiency is balanced, and the composite phosphorus removal agent is suitable for being widely popularized and used.

Description

technical field [0001] The invention belongs to the technical field of phosphorus removal agents for sewage, and in particular relates to a composite phosphorus removal agent for sewage treatment and a preparation method thereof. Background technique [0002] Phosphorus removal agent is an item for coagulation and turbidity removal treatment of urban water source water and phosphorus removal. It can achieve the purpose of deep phosphorus removal while coagulation and turbidity removal treatment of urban water source water. The application of phosphorus removal agent includes phosphorus removal in domestic sewage treatment plants , especially suitable for sewage treatment in the medium phosphorus section, suitable for industrial wastewater containing surface treatment processes, also used for wastewater treatment in food factories, pharmaceuticals, papermaking, pesticide and fertilizer factories, and also used in landfill plant landfill leachate treatment . [0003] Existing...

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Problems solved by technology

[0003] Existing phosphorus removal agents are generally divided into two categories, one is the phosphorus removal agent using sugar as the main component, such as a compound phosphorus removal agent with application number CN201710575467.2 and its preparation method, and the other It is a phosphorus removal agent that uses sulfurized and metal chloride as the main components. For example, the application number is 202010689702.0, a high-efficiency phosphorus removal agent for phosphorus removal in sewage. These two phosphorus removal agents have their own advantages and disadvantages. Sugars are used as The phosphorus removal agent with the main component produces less flocs when treating sewage, but it has a higher cost, while the phosphorus removal agent with sulfide and metal chloride as the main component has good treatment effect and low production price. However, in the process of sewage treatment, more flocs will be produced, with greater sludge production, and the addition of a large amount of metals is not conducive to the growth of biological systems, and is not conducive to sludge incineration or composting.