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Process for realizing waste-water zero-discharge of papermaking from waste paper by anaerobic-aerobic treatment

A technology of aerobic treatment and treatment process, applied in the field of environmental engineering, can solve the problems of increasing corrosion rate, salt accumulation and corrosion, and achieve the effect of saving energy, solving corrosion and low operating cost

Inactive Publication Date: 2005-12-21
XI AN JIAOTONG UNIV
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Problems solved by technology

[0013] (4) Salt accumulation and corrosion problems
An increase in temperature increases the rate of corrosion

Method used

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  • Process for realizing waste-water zero-discharge of papermaking from waste paper by anaerobic-aerobic treatment

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Embodiment Construction

[0027] Below content of the present invention is described further:

[0028] Referring to Fig. 1, the waste water D produced by the cardboard production line 10, i.e. circulating water, is filtered through a garden net 1 to reclaim the fibers in the waste water, and sent to the cardboard production line 10 as a papermaking raw material. The garden net mesh is 60 mesh, and the waste water after recycling the fibers Sequential access to a sinker 2 and 1 # Pool 3, the flow rate control of water is 30-60 cubic meters per ton of paper, 1 # 40-70% of the water in the sump 3 can be used as recycled water A for the paperboard production line 10, and the rest of the water is sent to the anaerobic reactor 4. Under the following control conditions, organic pollutants are removed by microorganisms and biological softening occurs, with a load of 8- 12kgCOD / m 3 Under the condition of .d, the operating conditions of the anaerobic reactor 4 are controlled as follows: the pH is 6.8-7.2, the ...

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Abstract

The invention discloses anaerobic-aerobic process achieving making paper with waste paper without waste water emission. Filter the fiber in waste water from production line as raw material. The waste water in which fiber is recycled is then sent to a sink pool and water pool 1, the rest sent to an anaerobic reactor softening and removing organic pollution by micorbion. With bio-technique of low cost, the waste water soften and purify are achieved at the same time, resolving

Description

technical field [0001] The invention relates to the technical fields of environmental engineering, water pollution control and water saving, in particular to a treatment process for realizing the reuse and zero discharge of papermaking industrial wastewater. Background technique [0002] Paper industry wastewater treatment technology has always been a key research and solution technology in the field of water pollution control at home and abroad. At home and abroad, the concept of white water closed circulation in paper mills has been proposed very early, and some European paper mills have also tried zero emission in factories using waste paper as raw materials. Zero discharge means the conservation of water resources and the complete control of water pollution, as well as the recovery of materials and energy. It is an important technology that embodies the idea of ​​circular economy and clean production. However, the recycling of waste water from the papermaking process wi...

Claims

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Application Information

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IPC IPC(8): D21F1/74
Inventor 贺延龄皇甫浩
Owner XI AN JIAOTONG UNIV
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