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A kind of pva-containing slurry wastewater treatment device and process

A wastewater treatment and slurry technology, applied in multi-stage water treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of substandard effluent quality and large sludge output, and achieve energy efficiency High utilization rate, improved biochemical properties, and reduced toxicity

Active Publication Date: 2021-10-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem to be solved by the present invention is that the effluent water quality of the existing PVA-containing slurry wastewater treatment process is not up to standard and the sludge output is large.

Method used

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  • A kind of pva-containing slurry wastewater treatment device and process

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Embodiment

[0025] Such as figure 1 Shown is a schematic diagram of a wastewater treatment device containing PVA slurry provided by the present invention, which includes a pretreatment unit, a biochemical treatment unit, a sludge reduction unit, and a biogas resource recovery unit.

[0026] The pretreatment unit includes a fine grid 1, a primary sedimentation tank 2, a pre-acidification tank 3, and a domestic sewage pipe 4. The fine grid 1 is connected to the primary sedimentation tank 2, and the outlet pipe of the primary sedimentation tank 2 is connected to the water inlet pipe of the pre-acidification tank 3. At the same time, the domestic sewage pipe 4 is connected to the pre-acidification tank 3 .

[0027] The biochemical treatment unit includes a first-stage spiral symmetrical flow anaerobic reactor 5, a return pipe one 6, an intermediate sedimentation tank one 7, a second-stage spiral symmetrical flow anaerobic reactor 8, a return pipe two 9, an intermediate sedimentation tank two ...

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Abstract

The invention discloses a treatment device and process for wastewater containing PVA slurry. The device includes a pretreatment unit, a biochemical treatment unit, a sludge reduction unit and a biogas resource recovery unit. The treatment process is as follows: wastewater containing PVA slurry enters the pretreatment unit, biochemical treatment unit, and sludge reduction unit for treatment in sequence, and the generated biogas is collected and utilized through the biogas resource utilization unit. The invention has the advantages of significant effect, low cost, good resource utilization effect, small secondary pollution and the like in treating wastewater containing PVA slurry.

Description

technical field [0001] The invention relates to a waste water treatment device and process, in particular to a waste water treatment device and process containing PVA slurry, belonging to the technical field of waste water treatment. Background technique [0002] As early as the 1940s, polyvinyl alcohol (PVA) was widely used as a slurry in PVA-containing, papermaking, chemical and other industries due to its good physical and chemical properties. In recent years, my country's PVA industry has developed rapidly and has become the largest PVA producer in the world. In 2016, the production capacity reached 1.246 million t / a, accounting for 59.9% of the total international production capacity. PVA slurry wastewater has high COD concentration and low biodegradability. If it is not effectively treated, a large amount of foam will be generated, which will affect the reoxygenation of the water body, and will also affect the release and migration of heavy metals in the sediments of r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/30C02F9/00C02F2001/007C02F2301/08
Inventor 陈小光唐丽娟李毓陵马颜雪
Owner DONGHUA UNIV