Petrochemical plant wastewater treatment system

Abstract

The invention relates to a petrochemical plant wastewater treatment system comprising a wastewater regulating tank, a forced aeration tank, an ammonia gas absorption tank, an adsorption tank, a desorption tank, an anoxic and anaerobic reaction tank, an efficient aeration filter tank and a clear water tank, wherein the forced aeration tank comprises an aeration region and a sedimentation region; a sulfuric acid solution is added into the ammonia gas absorption tank; the adsorption tank is provided with a plurality of adsorption regions, and each adsorption region is filled with an adsorbent; the anoxic and anaerobic reaction tank comprises a facultative aerobic section, an anoxic section and an anaerobic section which are partitioned by baffle plates; the efficient aeration filter tank comprises a downstream region, an upstream region and a sludge region; and wastewater enters the forced aeration tank through the regulating tank, ammonia gas is blown off and absorbed to generate ammonium sulfate to be recycled, then, the wastewater enters the adsorption tank, pollutants are adsorbed and desorbed, and then, the wastewater is recycled after being subjected to anoxic, anaerobic and aerobic reaction in the anoxic and anaerobic reaction tank and the efficient aeration filter tank.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a petrochemical plant wastewater treatment system. Background technique [0002] Petrochemical plants and enterprises produce a large amount of high-concentration ammonia nitrogen wastewater in the production process. The ammonia nitrogen content in the water body exceeds the standard, which will cause the deterioration of the ecological environment of the water body, endanger the survival of aquatic organisms such as fish and human health, form eutrophication of the water body, and reduce the ornamental value of the water body. It also increases water treatment costs. [0003] At present, there are three main types of treatment technologies for high-concentration ammonia-nitrogen wastewater at home and abroad: biological methods, physical methods, and chemical methods. The most widely used methods are stripping method, chemical precipitation method, breakpoint chlo...

AI Technical Summary

Problems solved by technology

[0004] In the chemical precipitation method, the magnesium ammonium phosphate precipitation method has the advantages of fast reaction speed, short required time, and the generated precipitate can be used as a compound fertilizer. However, it also has a large amount of chemicals and high processing costs. Defects such as limited outlets and difficulty in meeting water standards

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