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Anaerobic reactor and treatment method of cotton pulp production waste water

An anaerobic reactor and treatment method technology, which is applied in the field of anaerobic reactor and cotton pulp production wastewater treatment, can solve the problems of high comprehensive treatment cost, increased flocculant dosage, low treatment efficiency, etc., and achieve the goal of prolonging biological Effects of residence time, increased biosolids concentration, and reduced load

Inactive Publication Date: 2013-04-17
ANHUI SNOW DRAGON FIBER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the low biodegradability of cotton pulp production wastewater, the BOD / COD value is generally only about 0.2, so that the anaerobic removal rate (COD removal rate) of the first-stage treatment in the prior art is generally only about 30%, and the treatment efficiency is low. Therefore, the pressure of the second-stage and third-stage treatment is directly increased, which eventually leads to an increase in the amount of flocculant used in the third-stage treatment, making the comprehensive treatment cost high

Method used

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  • Anaerobic reactor and treatment method of cotton pulp production waste water
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  • Anaerobic reactor and treatment method of cotton pulp production waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Filter 10,000 tons of cotton pulp production wastewater with an influent COD of 5,000mg / L. The black liquor filter has a mesh area of ​​30m 2 , the filter mesh is 100 mesh;

[0072] Add hydrochloric acid to the filtered wastewater to adjust the pH value to 8.5;

[0073] The neutral wastewater after acid adjustment is sent to a volume of 3000m 3 The hydrolytic acidification tank in the hydrolysis and acidification tank was used for hydrolysis treatment. After the treatment, the COD of the wastewater was 4500mg / L, and the removal rate was 10%. Among them, the temperature was 30°C, the sludge concentration was 3g / L, the pH was 8.5, and the hydraulic retention time was 8 hours;

[0074] Pump the hydrolyzed wastewater into a volume of 8000m 3 of figure 1 The anaerobic reactor shown performs anaerobic treatment. After treatment, the COD of wastewater is 1800mg / L, and the removal rate is 60%. The temperature is 30°C, the sludge concentration is 8g / L, the pH is 7.5, and the ...

Embodiment 2

[0086] The process steps and conditions are basically the same as those in Example 1, except that the wastewater from cotton pulp production with an influent load of 10,000 tons of COD and a COD of 3,000 mg / L is treated.

Embodiment 3

[0093] The process steps and conditions are basically the same as those in Example 1, except that the wastewater from cotton pulp production with an influent load of 10,000 tons of COD and a COD of 2000 mg / L is treated.

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Abstract

The invention provides an anaerobic reactor and a treatment method of cotton pulp production waste water. The cotton pulp production waste water is sequentially subjected to hydrolytic treatment, anaerobic treatment, aerobic treatment and coagulation treatment; the anaerobic reactor comprises a housing and a gas-liquid separator; the housing is sequentially provided with a first reaction area, a second reaction area and a sediment area from the bottom up; a water inlet pipe is arranged at the lower part of the first reaction area; a first gas-collecting hood is arranged at the upper part of the first reaction area, and communicated with the gas-liquid separator by a methane lift pipe; a biological filler is arranged at the upper part of the second reaction area; a second gas-collecting hood is arranged above the biological filler, and communicated with the gas-liquid separator by a gas-collecting pipe; the sediment area is provided with a water outlet pipe; the gas-liquid separator is communicated with the first reaction area by a return pipe; the concentration of sludge subjected to the anaerobic treatment is 5g / L-10g / L; and the hydraulic retention time is 16h-22h. The treatment method can increase a removal rate of the anaerobic treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an anaerobic reactor and a method for treating wastewater from cotton pulp production. Background technique [0002] The pulp and paper industry is a traditional large water user and one of the important sources of water pollution. At present, my country's paper industry wastewater discharge and COD discharge rank first in all kinds of industrial discharges in my country. With the development of the economy, enterprises are increasingly facing problems such as shortage of water resources and shortage of raw materials. On the other hand, water pollution is becoming more and more serious. Therefore, how to effectively treat pulping and papermaking wastewater is not only the primary issue of pollution prevention and control in my country's paper industry, but also the primary issue of national industrial wastewater treatment, and it is of great significance to the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F9/14
CPCY02E50/30
Inventor 尚韧刘清
Owner ANHUI SNOW DRAGON FIBER TECH