Paper making sewage treatment and reuse process

A technology of papermaking sewage and process, which is applied in the field of papermaking wastewater treatment and reuse process, can solve the problems of complex steps, difficult operation, high total nitrogen content of wastewater, etc., and achieve the effect of simple steps, convenient operation and short treatment cycle

Active Publication Date: 2017-01-04
ZHEJIANG HUAQIANG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the wastewater obtained from the final treatment in this invention has the problem that the total nitrogen content is too high, and the process of this invention also has the disadvantages of complicated steps and difficult operation.

Method used

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  • Paper making sewage treatment and reuse process

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: as attached figure 1 As shown, a papermaking wastewater treatment and reuse process, including the adjustment of the initial sedimentation system, the sedimentation system in AAO and the coagulation reaction recycling system arranged in sequence,

[0023] The adjusting primary sedimentation system includes a grit chamber for sedimentation to remove suspended solids and impurities with a larger specific gravity, a fly ash sedimentation tank for adsorption and removal of smaller impurity particles in the wastewater, and The primary sedimentation tank used to collect waste water after the first sedimentation and adsorption treatment. The pipeline that extracts the supernatant from the fly ash sedimentation tank to the primary sedimentation tank is equipped with a filter for collecting wood particles larger than 0.2mm. Fiber filter screen, the filter screen is a 60-mesh inclined screen, the angle between the screen and the direction of waste water flow is 30 °...

Embodiment 2

[0040] Embodiment 2: as attached figure 1 As shown, a papermaking wastewater treatment and reuse process, including the adjustment of the initial sedimentation system, the sedimentation system in AAO and the coagulation reaction recycling system arranged in sequence,

[0041] The adjusting primary sedimentation system includes a grit chamber for sedimentation to remove suspended solids and impurities with a larger specific gravity, a fly ash sedimentation tank for adsorption and removal of smaller impurity particles in the wastewater, and The primary sedimentation tank used to collect waste water after the first sedimentation and adsorption treatment. The pipeline that extracts the supernatant from the fly ash sedimentation tank to the primary sedimentation tank is equipped with a filter for collecting wood particles larger than 0.2mm. Fiber filter screen, the filter screen is a 60-mesh inclined screen, the angle between the screen and the direction of waste water flow is 30 °...

Embodiment 3

[0058] Embodiment 3: as attached figure 1 As shown, a papermaking wastewater treatment and reuse process, including the adjustment of the initial sedimentation system, the sedimentation system in AAO and the coagulation reaction recycling system arranged in sequence,

[0059] The adjusting primary sedimentation system includes a grit chamber for sedimentation to remove suspended solids and impurities with a larger specific gravity, a fly ash sedimentation tank for adsorption and removal of smaller impurity particles in the wastewater, and The primary sedimentation tank used to collect waste water after the first sedimentation and adsorption treatment. The pipeline that extracts the supernatant from the fly ash sedimentation tank to the primary sedimentation tank is equipped with a filter for collecting wood particles larger than 0.2mm. Fiber filter screen, the filter screen is a 60-mesh inclined screen, the angle between the screen and the direction of waste water flow is 30 °...

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Abstract

The invention belongs to the technical field of waste water treatment, and particularly relates to a paper making waste water treatment and reuse process. The process involves a regulating primary precipitation system, an AAO middle precipitation system and a coagulation reaction reuse system in sequential arrangement, wherein the coagulation reaction reuse system comprises a coagulation pool used for extracting liquid supernatant from the middle precipitation pool; flocculating agents are added into the coagulation pool so as to remove precipitate fiber; then, collection is performed for reuse; the flocculating agents are prepared from sequentially added polyaluminium sulfate and anionic polyacrylamide through being metered in parts by weight; before the addition of the flocculating agents, the water body pH in the coagulation pool is regulated to 7.2 to 7.4 by diluted hydrochloric acid. The process has the advantages that waste water generated by paper making is subjected to physicochemical and biochemical treatment so as to be collected and reused; the steps are simple; the operation is convenient; the treatment period is short; the cost is low; the treatment effect is obvious; each discharge index is lower than the national standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a papermaking wastewater treatment and reuse process. Background technique [0002] Since the "Twelfth Five-Year Plan", the research on key emission reduction technologies related to electroplating, leather, chemical industry, papermaking and other heavily polluting industries has become more and more in-depth. In the process of the above-mentioned industries, waste gas, waste water, and waste resource recovery and utilization technologies have become relevant. One of the research focuses of researchers in the field. The production wastewater of these industries generally has complex components and a wide variety of pollutants. It usually has the characteristics of high CODCr, high BOD5, high SS concentration, high NH3-N concentration, and high chroma. It is one of the most difficult industrial wastewater to treat. Generally, traditional physicochemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
CPCC02F1/001C02F1/281C02F1/56C02F1/66C02F3/30C02F9/00C02F2001/007C02F2103/28
Inventor 唐建强
Owner ZHEJIANG HUAQIANG ENVIRONMENTAL TECH
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