Resourceful treatment process for high-concentration organic wastewater containing phosphorus and sulfur

Abstract

The invention discloses a resourceful treatment process for high-concentration organic wastewater containing phosphorus and sulfur. The process comprises the following steps: (1) spraying wastewater into an incineration system for high-temperature combustion; (2) cooling incineration tail gas, enabling the cooled incineration tail gas to enter a water washing tower for absorption, absorbing a phosphorus pentoxide component in the incineration tail gas via clean water, dissolving phosphorus pentoxide in the clean water, and conducting reacting to generate a phosphoric acid component; (3) enabling the washed tail gas to enter an ammonia washing tower for absorption, and conducting oxidizing to generate an ammonium sulfate component; (4) carrying out vacuum evaporation and concentration on clear water absorption liquid at the bottom of the water washing tower to obtain a phosphoric acid product; and (5) feeding ammonia water absorption liquid at the bottom of the ammonia washing tower into an MVR evaporative crystallizer, and carrying out evaporative crystallization to obtain an ammonium sulfate product. By adopting the process, the high-concentration organic wastewater containing phosphorus and sulfur can be effectively treated, recycling of phosphorus and sulfur in the wastewater is achieved, and economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, and relates to a resource treatment process for organic wastewater containing high phosphorus and sulfur concentrations. Background technique [0002] Pesticide, chemical and other industries will discharge a large amount of high-concentration organic wastewater during the production process, one of which contains high concentrations of organic phosphorus and organic sulfur. This type of wastewater has the characteristics of high COD, high nitrogen, phosphorus, and high sulfur, and has biological Toxic, is difficult to treat wastewater. If it is directly discharged into the environment without treatment, it will cause great harm to the environment, damage human health, and pose a huge threat to the sustainable development of human beings and society. [0003] Conventional processes for the treatment of high-concentration organic wastewater containing phosphorus and sulfur in...

AI Technical Summary

Problems solved by technology

Microorganisms have the advantages of strong adaptability, wide treatment range, low treatment cost, and no secondary pollution, but they are sensitive to the environment and difficult to treat high-concentration organic wastewater

[0004] To sum up, the existing high-concentration organic wastewater treatment processes containing phosphorus and sulfur have more or less certain defects, and it is difficult to realize the recovery and utilization of phosphorus and sulfur

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