Treatment system and process for high-temperature high-hardness high-COD sewage containing ammonia and nitrogen

Abstract

The invention discloses a treatment system and process for high-temperature high-hardness high-COD sewage containing ammonia and nitrogen. The treatment system comprises a mechanical grating, an oil separation tank, a hardness-elimination device, an air floatation pool, a regulating pool, a cold water tower, a hydrolysis-acidification pool, a SBR biochemical reaction group, a buffer pool and a secondary sedimentation pool. Sewage successively flows through the mechanical grating, the oil separation tank, the hardness-elimination device, the air floatation pool, the regulating pool, the hydrolysis-acidification pool, the SBR biochemical reaction group and the secondary sedimentation pool, wherein the sewage from the regulating pool is pressurized by an elevator pump, then enters the cold water tower, and then flows back to the regulating pool via a water outlet formed in an anaerobic pre-reaction water tank. The treatment system and process provided by the invention can reduce water resource cost and sewage discharge for enterprises and improve overall economic benefits of the whole enterprises.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a high-temperature, high-hardness, high-COD, ammonia-nitrogen sewage treatment system and process. Background technique [0002] With the rapid development of the domestic economy, the domestic environmental protection situation is becoming increasingly severe. In today's industrial production process, a large amount of water resources are consumed every day for the production process system, and at the same time, a large amount of sewage with high temperature, high hardness, high COD, and ammonia nitrogen is produced, which seriously endangers Due to the natural environment we live in, most of the sewage treatment processes cannot handle this kind of sewage well, so that a large amount of sewage that is not up to standard is discharged to nature, causing a large amount of land and groundwater to be polluted and affecting the living environment of human beings. . [0...

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Problems solved by technology

[0002] With the rapid development of the domestic economy, the domestic environmental protection situation is becoming increasingly severe. In today's industrial production process, a large amount of water resources are consumed every day for the production process system, and at the same time, a large amount of sewage with high temperature, high hardness, high COD, and ammonia nitrogen is produced, which seriously endangers Due to the natural environment we live in, most of the sewage treatment processes cannot handle this kind of sewage well, so that a large amount of sewage that is not up to standard is discharged to nature, causing a large amount of land and groundwater to be polluted and affecting the living environment of human beings.

[0003] Some of the sewage produced by chemical enterprises after production has a relatively high temperature. The existing sewage treatment system has a limited ability to deal with high-temperature sewage, which reduces the recycling rate of sewage by enterprises, thereby increasing the cost of water resources for enterprises and reducing sewage discharge.

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