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Viscose industry waste water treating method and device

A treatment method and viscose fiber technology, applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of large amount of wastewater, increased product cost, and decreased economic benefits. , to achieve the effect of low production and operating costs, low equipment requirements, and high removal efficiency

Inactive Publication Date: 2015-12-02
天津市生态环境科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of wastewater in the viscose fiber industry has become a heavy burden on the economic development of enterprises, especially in water-shortage areas. Due to the constraints of water resources, the cost of enterprises' products has increased and economic benefits have declined, thus affecting the enthusiasm and initiative of enterprises to control pollution. sex

Method used

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  • Viscose industry waste water treating method and device
  • Viscose industry waste water treating method and device
  • Viscose industry waste water treating method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of processing method of viscose fiber waste water:

[0041] (1) First, viscose wastewater should be divided into high-salt and low-salt wastewater according to its salinity, and then treated separately;

[0042] (2) Physicochemical pretreatment: Blow off the waste water, and the hydrogen sulfide gas blown out is subjected to alkaline elution through the spray tower, and the waste liquid is recycled for resources; Sodium hydroxide, 5% concentration) elution, elution waste liquid for resource recycling;

[0043] (3) Neutralize high-salt wastewater and cool it through a cooling tower, and use waste carbide slag to further neutralize the neutralized wastewater to obtain high-salt neutral wastewater; step (3) low-salt wastewater does not need to be Bioaugmentation treatment, direct use of activated sludge method for biochemical treatment, the continuous microfiltration (Dow membrane, Q max =300m3 / h·set, 2000L / h / only 20 pieces / set) + reverse osmosis membrane (Dow mem...

Embodiment 2

[0050] Physicochemical pretreatment: Blow off the wastewater, carry out alkaline elution of the hydrogen sulfide gas blown out through the spray tower, and recycle the eluted waste liquid; the viscose chemical fiber wastewater is accompanied by the generation of wastewater, and there is a large amount of hydrogen sulfide Gas generation, this kind of waste gas is washed by alkaline spray tower. The chemical reaction in the alkali spray tower is driven by the pump to carry out circular spraying, and the hydrogen sulfide gas and carbon disulfide gas discharged from the alkali spray tower meet the standard discharge. Using this method to absorb hydrogen sulfide waste gas has high efficiency and large processing capacity per unit time, and solves the problems of environmental pollution and production safety hazards caused by hydrogen sulfide waste gas discharge. Specifically, the treated waste lye containing sodium hydroxide solution and alkali fiber containing hemicellulose is rea...

Embodiment 4

[0068] After the pretreated high-temperature acidic wastewater is neutralized, add bacterial preparations (bacteria Bacillus subtilis, 0.5kg / day ton of wastewater. The concentration of bacteria is 1×10 4 pc / ml, strain Bacillus subtilis dry bacteria + volcanic mud, the weight ratio is 1:1), the change of wastewater COD corresponding to different dosages is shown in image 3 : Adding bacterial preparations once is 0.4kg of bacterial preparations and 0.6kg of bacterial preparations per ton of wastewater in one day’s water volume. image 3 The results show that the COD is always below 400mg / L when 0.6kg of bacterial preparation is added at one time. It can even reach 200mg / L; when the bacterial preparation is 0.4kg at one time, its COD runs below 500-600mg / L. It can be seen that with the different doses of bacterial preparations added at one time, the degree of COD degradation has certain changes. On the basis of considering the cost, when the wastewater discharge standard is le...

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Abstract

The invention relates to viscose waste water treating method and device. The method includes the steps of firstly, viscose waste water is divided into high-salt waste water and low-salt waste water, and the high-salt waste water and the low-salt waste water are treated independently; secondly, the high-salt waste water and the low-salt waste water are respectively blown off and then cooled in a cooling tower, and alkaline recycling is performed through a spraying tower to recycle blown-off hydrogen sulfide; thirdly, biochemical treatment is performed after fine adjustment is performed on the low-salt waste water, and the waste water reaches primary standard and is recycled after continuous microfiltration and passing a reverse osmosis membrane; fourthly, waste carbide slag is used to adjust the pH of the high-salt waste water, and the adjusted high-salt waste water and the concentrated water in the third step are jointly subjected to enhanced biological treatment; fifthly, performing activated carbon absorption deep treatment on the high-salt waste water subjected to the enhanced biological treatment to achieve emission up to standard; sixthly, saturated activated carbon after absorption is regenerated. The viscose waste water treating and recycling method is low in cost, resource saving, economical, and suitable for being popularized and applied in viscose industry waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection. The invention relates to a waste water treatment and reuse method, which is especially suitable for treating viscose waste water in the chemical fiber industry and reaches the production reuse standard, the waste water treatment and reuse method and its equipment, and the viscose fiber waste water treatment method and device. Background technique [0002] Viscose fiber is a chemical fiber processed by chemical and mechanical methods using polymer materials such as wood pulp and cotton pulp containing natural cellulose. It is a regenerated cellulose fiber derived from nature and superior to nature in chemical fiber, and it is one of the important materials of textile industry raw materials. Viscose fiber needs a lot of chemical raw materials in the production process and will produce a lot of wastewater. These wastewater contains sulfuric acid, zinc sulfate, carbon disulfide, cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/30
Inventor 段云霞乔楠石岩吕晶华许丹宇张金鸿郑先强林曼
Owner 天津市生态环境科学研究院
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