High-concentration industrial wastewater treatment method

Abstract

The invention relates to the technical field of water treatment, particularly a high-concentration industrial wastewater treatment method which is low in cost and simple to operate and can effectively remove heavy metals, nitrogen, phosphorus and harmful substances in industrial wastewater. The method is characterized by comprising the following steps: carrying out grid treatment on sewage to filter out large wastes, sending into a biofloculation tank to carry out biofloculation treatment, sending the sewage subjected to flocculation treatment into a primary sedimentation tank to perform primary sedimentation, sequentially sending into an anaerobic reactor and an aerobic reactor to carry out anaerobic reaction treatment and aerobic reaction treatment, sending into a secondary sedimentation tank, disinfecting the sewage discharged by the secondary sedimentation tank, and discharging or recycling. Compared with the prior art, the method enhances the acidification hydrolysis effect, improves the fluidization and mass transfer in the anaerobic reactor, enhances the reaction efficiency, and reduces the sludge discharge amount.

Description

Technical field: [0001] The invention relates to the technical field of water treatment, in particular to a high-concentration industrial wastewater treatment method that is low in cost, easy to operate, and capable of effectively removing harmful substances such as heavy metals, nitrogen, and phosphorus in industrial wastewater. Background technique: [0002] my country's water resources are scarce. With the continuous deepening of the national sustainable development strategy, improving and solving the problem of industrial wastewater discharge has become an urgent problem to be solved. As the name implies, industrial wastewater is the sewage discharged in various industrial production processes, which often contains harmful substances such as heavy metal ions, nitrogen, phosphorus, and even some polymeric organic pollutants that are difficult to degrade. If it is discharged directly, it will be harmful to the environment and serious impact on people's health. [0003] Wh...

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Problems solved by technology

[0004] Bioflocculation is also an important sewage treatment method. In the process of water treatment, the toxic and harmful substances dispersed in water are separated by sedimentation with the help of flocculants. Flocculants are generally divided into inorganic salt flocculants, organic polymer flocculants , natural organic polymer flocculants, synthetic polymer flocculants and other major categories, among which inorganic salt flocculants are cheap, but will have adverse effects on human health and the environment. The slag produces less and has strong flocculation ability, but its residues are likely to cause teratogenicity, carcinogenicity, and mutagenicity, so the scope of use is limited

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