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Method for treating sugar industry wastewater

A technology for industrial wastewater and treatment methods, which is applied in food industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high chemical oxygen consumption and biological oxygen consumption, and water rich Nutrition, damage to the environment, etc.

Inactive Publication Date: 2013-12-11
SUZHOU FUQINUO WATER TREATMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of sugar refining enterprises, a lot of wastewater will be produced. Due to the large amount of organic matter in these wastewater, such as some disaccharides or polysaccharides, due to the existence of organic matter, the chemical oxygen consumption and biological consumption in the production wastewater of sugar refining enterprises Oxygen values ​​are relatively high. If these pollutants are not properly treated, they are directly discharged into the environment, which will easily lead to eutrophication of the water body and damage the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] (1) Take the sugar industry wastewater, add the flocculant polyaluminum sulfate to the wastewater, and the amount of polyaluminum sulfate added is 1.2wt% of the weight of the wastewater; (2) Settling naturally after mixing uniformly, the settling time is 7h; (3) Settling After the completion, extract the supernatant of the upper layer; (4) Pass the supernatant through the filter membrane with a molecular weight of 20,000; (5) Use the permeate after passing through the filter membrane with a molecular weight of 30,000 to ultrafiltration. Is 500; (6) Collect the permeate to obtain the treated sugar industry wastewater.

Embodiment 2

[0010] (1) Take the sugar industry wastewater, add the flocculant polyaluminum sulfate to the wastewater, and the amount of polyaluminum sulfate added is 2.4wt% of the weight of the wastewater; (2) Settling naturally after mixing uniformly, the settling time is 5h; (3) Settling After the end, extract the supernatant of the upper layer; (4) Pass the supernatant through the filter membrane with a molecular weight of 10,000; (5) Use the permeate after passing through the filter membrane with a molecular weight of 30,000 to ultrafiltration. It is 600; (6) Collect the permeate to obtain the treated sugar industry wastewater.

Embodiment 3

[0012] (1) Take the sugar industry wastewater, add the flocculant polyaluminum sulfate to the wastewater, the amount of polyaluminum sulfate added is 1.7wt% of the weight of the wastewater; (2) After mixing uniformly, it will settle naturally, and the settling time is 6h; (3) Settling After the end, extract the supernatant of the upper layer; (4) Pass the supernatant through the filter membrane, the molecular weight of the filter membrane is 30,000; (5) The permeate after passing through the filter membrane with molecular weight of 30,000 is ultrafiltered again, the molecular weight of the ultrafiltration membrane Is 800; (6) Collect the permeate to obtain the treated sugar industry wastewater.

[0013] Example 1 Example 2 Example 3 CODcr value (mg / L)414632 BOD value (mg / L) 242829

[0014]

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PUM

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Abstract

The invention discloses a method for treating sugar industry wastewater, which comprises the following steps of: (1) fetching the sugar industry wastewater, and adding a flocculant polyaluminium sulfate into the wastewater, wherein the added amount of the polyaluminium sulfate is 1.2-2.4wt% of the weight of the wastewater; (2) uniformly mixing and naturally settling, wherein the settling time is 5-7 hours; (3) after the settling, extracting the upper-layer supernate; (4) enabling the upper-layer supernate to pass through a filter membrane, wherein the molecular weight of the filter membrane is 10,000-30,000; (5) performing ultrafiltration on the permeate passing through the filter membrane with molecular weight of 10,000-30,000, wherein the molecular weight of the ultrafiltration membrane is 500-800; and (6) collecting the permeate to obtain the treated sugar industry wastewater. By adopting the treatment method disclosed by the invention, the CODcr (Chemical Oxygen Demand) value of the treated sugar industry wastewater is reduced from 2,730mg / L to 32-46mg / L, and the BOD (Biochemical Oxygen Demand) value is reduced from 1,869mg / L to 24-29mg / L.

Description

Technical field [0001] The invention relates to a wastewater treatment method, in particular to a sugar industry wastewater treatment method. Background technique [0002] In the production process of sugar enterprises, a lot of waste water will be generated. There are more organic matter in these waste water, such as some disaccharides or polysaccharides. The existence of organic matter leads to the chemical oxygen consumption and biological consumption in the production wastewater of sugar enterprises. The oxygen content is high. If these pollutants are not properly treated, they are directly discharged into the environment, which will easily lead to eutrophication of water bodies and damage the environment. Therefore, it is necessary to treat the production wastewater of sugar enterprises to reduce the biological oxygen consumption value and chemical oxygen consumption value before discharge. Summary of the invention [0003] The technical problem to be solved: the problem of ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/32
Inventor 吴彦
Owner SUZHOU FUQINUO WATER TREATMENT EQUIP