Treatment method of chemical and chemical engineering waste liquid

Abstract

The invention discloses a chemical and chemical engineering waste liquid treatment method, and particularly relates to the technical field of chemical and chemical engineering waste liquid treatment. The chemical and chemical engineering waste liquid treatment method comprises the following specific steps: 1, carrying out oxidation treatment; 2, carrying out acid-base neutralization treatment; 3, carrying out stirring treatment; 4, carrying out precipitation treatment; 5, carrying out toxicity neutralization treatment; and 6, carrying out biological filtration. According to the invention, through oxidation and acid-base neutralization treatment, soluble solvents such as methanol, ethanol and acetic acid are degraded into organic matters such as acetic acid and propionic acid which are easily utilized by microorganisms, so that degradation of part of organic pollutants in the wastewater is realized; through stirring and precipitation treatment, nitrogen-containing, phosphorus-containing and lead-containing wastes are converted into gas or are precipitated, so that extraction and cleaning are facilitated; through toxicity neutralization treatment, toxic wastes containing chromium and mercury are separated from water, so that various chemical pollutants in the wastewater can be effectively removed; and microorganisms are utilized to carry out biochemical oxidation on organic matters, so that the degradation of part of organic pollutants in the wastewater is finally realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of chemical and chemical waste liquid treatment, and in particular to a treatment method for chemical and chemical waste liquid. Background technique [0002] The chemical industry, also known as the chemical processing industry, generally refers to the process industry in which chemical methods play a major role in the production process. The chemical industry is an industrial sector that has been formed since the beginning of the 19th century and has developed rapidly. The chemical industry is a knowledge- and capital-intensive industry. With the development of science and technology, it has gradually developed into a multi-industry and multi-variety production department from the initial production of only a few inorganic products such as soda ash and sulfuric acid, and organic products mainly extracted from plants to make dyes. A large number of comprehensive utilization of re...

AI Technical Summary

Problems solved by technology

Among them, the concentration of calcium, magnesium ions and suspended solids is relatively high. Compared with COD, the concentration of ammonia nitrogen is relatively high and COD is relatively low, which will cause fouling and blockage of equipment pipelines, especially pollutants containing chromium and mercury, which are difficult to deal with

If the wastewater is not treated and directly discharged into the environment, it will cause serious pollution to the environment and easily cause great harm to humans and animals.

At present, the treatment method of chemical organic wastewater containing persistent organic pollutants is mainly to carry out advanced oxidation (such as iron-carbon micro-electrolysis, metal powder reduction, Fenton method, etc.) pretreatment first, and then biological treatment. For effective treatment of various substances, there are often problems of water quality fluctuations, and the treatment effect is unstable. After sewage treatment, it only meets the standard discharge indicators. There is a certain environmental protection pressure and has a potential impact on the environment.

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