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Wastewater recycling process for waste paper pulping and manufacturing bobbin paper

A waste water recovery and treatment process technology, applied in the direction of process waste water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as system corrosion, odor product quality, decline, etc., to reduce pollution , System power requirements are low, reducing the effect of using

Active Publication Date: 2013-12-04
山东绿泉环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of system corrosion, odor and product quality decline in zero discharge of waste paper and paper making, it is necessary to provide an efficient and clean waste paper and paper making wastewater recycling process and device

Method used

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  • Wastewater recycling process for waste paper pulping and manufacturing bobbin paper
  • Wastewater recycling process for waste paper pulping and manufacturing bobbin paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 A waste paper pulping process for the recycling and utilization of bobbin paper waste water. The waste water is successively subjected to high-efficiency anaerobic biological treatment, aerobic biological treatment, ozone-biological activated carbon treatment, microfiltration and nanofiltration treatment. Effluent water recycling.

Embodiment 2

[0039] Example 2 A waste paper pulping process for the recycling and utilization of bobbin paper waste water. The waste water is successively subjected to high-efficiency anaerobic biological treatment, aerobic biological treatment, ozone-biological activated carbon treatment, microfiltration and nanofiltration treatment. Effluent water recycling.

[0040] The high-efficiency anaerobic biological treatment refers to: the wastewater is first treated by hydrolysis and pre-acidification, using hydrolysis anaerobic microorganisms to remove part of the organic pollutants, and the effluent undergoes anaerobic fermentation to decompose most of the refractory organic matter in the wastewater and produce CH 4 Bioenergy.

[0041] The aerobic biological treatment refers to removing most of the organic pollutants in the water by means of the adsorption, oxidation and degradation of aerobic microorganisms in the aeration tank, and the effluent from the aeration tank flows into the secondar...

Embodiment 3

[0045] Example 3 A waste paper pulping manufacturing bobbin paper waste water recycling process, the steps are basically the same as in Example 2, the difference is that before the waste water is hydrolyzed and pre-acidified, it is first treated by a pre-treatment facility to remove the waste water. Large floating solids, recycle longer fibers, and adjust water quality and water volume. The pretreatment facilities are grid water collection wells, inclined nets, sedimentation tanks and / or adjustment tanks, and the grid spacing in the grid water collection wells 15-25mm, inclined net 100-150 mesh. When the wastewater is treated by hydrolysis and pre-acidification, the parameters are controlled as follows: the hydraulic retention time is 6-8h, the dissolved oxygen concentration is ≤0.5mg / L, and the reaction temperature is maintained at 25-30°C.

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Abstract

The invention provides a wastewater recycling process for waste paper pulping and manufacturing bobbin paper. The wastewater recycling process is characterized in that waste water is sequentially subjected to high-efficient anaerobic organism processing, aerobic organism processing, ozone-biological activated carbon processing and microfiltration and nanofiltration processing, and water after processing is recycled. Refractory organics such as residual lignin in the wastewater can be effectively removed, COD removal rate is more than 98 percent, and Ca2+ and Mg2+ removal rates are also high and are respectively larger than 75 percent and 85 percent.

Description

technical field [0001] The invention relates to the field of environmental protection in the papermaking industry and industrial wastewater treatment engineering technology, in particular to a waste paper pulping manufacturing bobbin paper wastewater recovery and utilization treatment process. Background technique [0002] The rapid development of my country's paper industry has led to increasingly prominent contradictions between it and resources and the environment, mainly manifested in the shortage of plant fiber raw materials and production water resources, and the increasingly serious pollution of pulp and paper wastewater to the environment, which have become two constraints restricting its development. Big bottleneck. Waste paper papermaking generally uses waste board paper, waste newspapers, waste books and periodical paper, other paper waste and commercial pulp (mostly bleached wood pulp) as the main raw materials to produce white board, container board, corrugated p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
Inventor 周焕祥宗可卿汪艳雯周波
Owner 山东绿泉环保科技股份有限公司
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