A process for pretreating high-phosphorus wastewater to remove total phosphorus and its process system

Abstract

The invention discloses a process for pre-treating high-concentration phosphorus-containing wastewater to remove total phosphorus (TP) and a process system thereof, and in particular discloses to a process system for pre-treating high-concentration phosphorus-containing wastewater to remove TP through multi-point dosing based on a chemical method; the process system disclosed by the invention mainly comprises a sewage storage tank, an adjusting sedimentation tank, a first chemical reaction tank, a first high-efficiency clarification tank, a second chemical reaction tank, a second high-efficiency clarification tank, a buffer tank, a third chemical reaction tank, a third high-efficiency clarification tank, a coagulation mixing tank, solid-liquid separation equipment, a white mud concentrating and storing tank and a yellow mud concentrating and storing tank and is characterized in that chemical agents, such as calcium salt, acid, an oxidizing agent, a complexing agent and the like, are respectively added through the chemical method after high-concentration phosphorus-containing wastewater is aerated, homogenized and pre-oxidized in the sewage storage tank; oxidization reaction for many times, sedimentation reaction, and complexation coagulation reaction are realized; after solid-liquid separation is carried out for many times, the effluent TP is decreased from 2000 mg / L to about 10 mg / L; the removing rate is up to 99%; and pre-treated wastewater can be further subjected to biochemical treatment by entering a municipal pipe. The process system disclosed by the invention is capable of realizing resource recovery, effectively removing the phosphorus content in wastewater and greatly reducing the treatment burden of municipal wastewater.

Description

technical field [0001] The present invention relates to an industrial wastewater treatment process, in particular to a process and a process system for pretreating high-phosphorus wastewater to remove total phosphorus, and in particular to a process based on chemical multi-point dosing to pretreat high-concentration phosphorus-containing wastewater to remove total phosphorus and its crafting system. Background technique [0002] Phosphorus pollution can cause harm to the human body, marine organisms, soil, and water bodies in different degrees, especially phosphorus in water bodies in the form of orthophosphate ions, polymeric phosphates, and organic forest compounds. The total phosphorus concentration in still water bodies exceeds 86ug / L, it is judged that the water body is eutrophic and polluted. Excessive phosphorus in the water body will cause red tides, algae blooms, fish and shrimp deaths and other malignant phenomena. [0003] Chemicals such as sulfuric acid, nitric...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a process for pretreating high-phosphorus wastewater to remove total phosphorus and its process system, especially to provide a chemical method based on multi-point dosing to pretreat high-concentration phosphorus-containing wastewater to remove total phosphorus process and its The process system overcomes the disadvantages of unsatisfactory treatment effect and high cost of the existing technology, and can effectively eliminate the phosphorus content in wastewater. It is an ideal method for treating high-concentration phosphorus-containing wastewater at present.

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