A coking wastewater treatment system and treatment method

Abstract

The invention discloses a coking wastewater treatment system, including an upflow anaerobic sludge blanket reactor, an anoxic denitrification biofilter, an aerobic nitration biofilter, a multistage iron carbon micro-electrolysis coupling Fenton oxidation bed reactor, an aerobic nitration biofilter and an anoxic denitrification biofilter. A coking wastewater treatment method comprises the following steps of coking wastewater enters the upflow anaerobic sludge blanket reactor, the anoxic denitrification biofilter, the aerobic nitration biofilter, the multistage iron carbon micro-electrolysis coupling Fenton oxidation bed reactor, the aerobic nitration biofilter and the anoxic denitrification biofilter from a raw coking wastewater inlet pipe from bottom up, and is discharged. The coking wastewater treatment system disclosed by the invention has the advantages of being small in occupation area and low in energy consumption, having efficient wastewater treatment efficiency, reducing the operation cost of wastewater treatment, and being high in treatment load, low in energy consumption and small in sludge production yield.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a system and method for treating coking wastewater. Background technique [0002] Coking wastewater is a refractory wastewater containing a large amount of harmful and toxic substances such as oil, phenol, ammonia nitrogen, etc. produced in the process of coal coking. This type of wastewater has the characteristics of complex composition and high concentration of pollutants. In addition to 85% of phenolic compounds, its organic components also include aliphatic compounds, polycyclic aromatic hydrocarbons (PAHs) and heterocyclic compounds containing oxygen, nitrogen and sulfur. Wait. The discharge of organic pollutants into the water body will consume the dissolved oxygen in the water, which will eventually lead to the lack of oxygen in the water body, which will cause the aquatic animals in the water to be unable to breathe and die. The carcass will anaerobicly dec...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a coking wastewater treatment system and treatment method to solve the unsatisfactory removal effect of the traditional coking wastewater treatment process on refractory and complex organic pollutants, which leads to unsatisfactory COD, ammonia nitrogen, total nitrogen and chromaticity in the effluent. Compared with the traditional process, it occupies a small area, low energy consumption, and has high efficiency in wastewater treatment, reduces the operating cost of wastewater treatment, and has the characteristics of high treatment load, low energy consumption, and less sludge production.

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