Dimethylformamide and dimethylamine wastewater treatment process for synthetic leather production

Abstract

The invention relates to a chemical wastewater treatment technology, and in particular relates to a dimethylformamide and dimethylamine wastewater treatment process for synthetic leather production. The process comprises the following steps: physical and chemical treatment, biochemical treatment, deep treatment and sludge treatment, wherein in a physical and chemical treatment process, wastewater sequentially passes through a grid well, a water collecting and adjusting tank, a coagulation and sedimentation integrated tank 1, a Fenton catalytic oxidation tank and a coagulation and sedimentation integrated tank 2; in a biochemical treatment process, the wastewater sequentially passes through a pre-acidification adjusting tank, a UASB reaction tank, a reflux water tank, an adjusting tank 1, a first-stage A / O tank, an intermediate sedimentation tank, a second-stage A / O tank and a secondary sedimentation tank; in a deep treatment process, the wastewater sequentially passes through a sand filter tank and a clear water tank, and is finally discharged up to standard by virtue of a standardized discharge opening; and in a sludge treatment process, sludge is treated by a sludge thickening tank and a chamber type filter press or a belt filter press to obtain dry mud, and the dry mud is externally transported periodically. The dimethylformamide and dimethylamine wastewater treatment process disclosed by the invention is high in biodegradability, stable in running performance and low in treatment cost.

Description

technical field [0001] The invention relates to a chemical wastewater treatment technology, in particular to a synthetic leather production dimethylformamide and dimethylamine wastewater treatment process. Background technique [0002] The selection of wastewater treatment process scheme is closely related to the nature of wastewater and the quality of influent and effluent water. During the production process of synthetic leather, tower top wastewater, tower washing wastewater, boiler wastewater, condensation wastewater, leather tanning wastewater, bucket washing wastewater, domestic sewage, etc. will be generated. Among them, tower washing wastewater, boiler wastewater, condensation wastewater, leather tanning wastewater, and bucket washing wastewater have low B / C, poor biodegradability, high organic concentration, and large water quality fluctuations. The organic structure is mainly macromolecular polymers, The ring chain structure is difficult to degrade by general trea...

AI Technical Summary

Problems solved by technology

Among them, tower washing wastewater, boiler wastewater, condensation wastewater, leather tanning wastewater, and bucket washing wastewater have low B / C, poor biodegradability, high organic concentration, and large water quality fluctuations. The organic structure is mainly macromolecular polymers, Ring chain structure, the general treatment process is difficult to degrade, and belongs to the high-concentration organic wastewater that is difficult to degrade

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