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Process for treating wastewater in fermentation industry based on activated aerobic sludge-artificial ecological wetland composite system

A technology for activated aerobic sludge and industrial wastewater, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, chemical instruments and methods, etc. High, limited processing capacity and other problems, to achieve the effect of low input cost, good comprehensive decontamination effect, low operating cost and management cost

Active Publication Date: 2014-10-29
HUNAN FLAG BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high energy consumption, high investment and operating costs of the pure microbial treatment method, it is greatly affected by the environmental conditions such as the water temperature and pH of the wastewater.
2. Although the air flotation method has the advantages of short separation time, simple device, large processing capacity, and small footprint, the treatment efficiency of the air flotation method is related to the feeding position, air intake, liquid level, and air flotation. The operating conditions such as the amount of agent are closely related, and the management and operation are complicated. At the same time, the performance requirements of the processing equipment are high, and the investment cost and operating cost are high.
3. The photosynthetic bacteria treatment method to treat fermentation wastewater has high removal efficiency of organic pollutants, low investment, less land occupation, and bacterial sludge is a protein feed that is harmless to humans and animals and rich in nutrients. It is a very promising Treatment technology, but light and bacteria need corresponding heating and heat preservation devices for temperature changes, and strong incandescent lighting is required at night, the operating cost is high, and management is inconvenient, etc.
The process equipment is complicated to operate, consumes a lot of energy, and has problems such as film blocking and difficult equipment maintenance.
Patent No. 200910234221.4 also discloses an integrated upflow reactor and a method for advanced treatment of fermentation process wastewater, but its treatment object is the effluent after anaerobic and aerobic secondary biochemical treatment of fermentation industrial wastewater, which is characterized by high salinity , COD is less than 400mg / L and BOD / COD value is less than 0.25. The reactor has limited processing capacity and must combine anaerobic and aerobic reactions, which will inevitably lead to problems such as large floor area, large energy consumption, high investment costs and operating costs.

Method used

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  • Process for treating wastewater in fermentation industry based on activated aerobic sludge-artificial ecological wetland composite system
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  • Process for treating wastewater in fermentation industry based on activated aerobic sludge-artificial ecological wetland composite system

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Experimental program
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Effect test

Embodiment 1

[0037] process such as figure 1 As shown, 30t of yeast fermentation industrial wastewater is processed daily, including extraction and concentration wastewater, tank and equipment cleaning wastewater, etc. Wastewater is rich in protein, amino acid, sugar and other organic matter and various trace elements, COD is as high as 3500mg / L, ammonia nitrogen value exceeds 400mg / L, and pH value fluctuates in the range of 4-11.

[0038] The treatment process is as follows: the fermentation industrial wastewater is filtered by thick and thin grids and then flows into the adjustment pool, the area of ​​the adjustment pool is 40m 2 , 2m deep, equipped with an acid-base supplementary device (10mol / L of H 2 SO 4 and 30% liquid alkali solution) to adjust the pH range to between 7 and 8.

[0039] The wastewater pretreated in the regulating tank is pumped into the aeration box through the sewage lift pump, and the aeration box is as follows: figure 2 structure shown.

[0040] Install four...

Embodiment 2

[0051] Daily treatment of 20t E. coli fermentation industrial wastewater, including extraction and concentration wastewater, tank equipment washing wastewater, etc. Since the E. coli culture medium contains a large amount of organic nitrogen and carbon sources, the total COD in the discharged industrial wastewater is above 5000mg / L, the ammonia nitrogen value is above 500mg / L, and the total phosphorus reaches 100mg / L.

[0052] The treatment process is as follows: the fermentation industrial wastewater is filtered by thick and thin grids and then flows into the adjustment pool, the area of ​​the adjustment pool is 30m 2 , 2m deep, equipped with an acid-base supplementary device (10mol / L of H 2 SO 4 and 30% liquid alkali solution) to adjust the pH range to between 7 and 8.

[0053] The wastewater pretreated in the regulating tank is pumped into the aeration tank through the sewage lifting pump, and the structure of the four sets of aeration tanks is the same as that of the fir...

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Abstract

The invention discloses a process for treating wastewater in fermentation industry based on an activated aerobic sludge-artificial ecological wetland composite system. The process comprises the steps of carrying out sufficient aerobic treatment on wastewater in the fermentation industry by using an aeration tank filled with activated sludge, then, transferring the wastewater to an artificial ecological wetland system, and discharging the wastewater after the treated wastewater is up to the standard. The process has the advantages that aerobic treatment and the design of the artificial ecological wetland system are organically combined to carry out purification treatment on the wastewater in the fermentation industry, so that a good dirt removal effect is achieved, the removal rate of chemical oxygen demand in wastewater in yeast fermentation industry can be up to 95.7%, the removal rate of ammonia nitrogen can be up to 91.2%, and the removal rate of total phosphorus can be up to 95.0%. The activated aerobic sludge-artificial ecological wetland composite system disclosed by the invention is scientific and reasonable in design, simple and convenient in operation, low in investment cost, good in comprehensive dirt removal effect for the wastewater in the fermentation industry and suitable for popularization and application.

Description

technical field [0001] The invention relates to a process for treating fermentation industrial wastewater based on an activated aerobic sludge-artificial ecological wetland composite system, belonging to the field of wastewater treatment. Background technique [0002] The wastewater discharge of the fermentation industry accounts for about 1.8% of the total industrial wastewater discharge in the country, and it is the most polluting industry in the light industry. Wastewater from the fermentation industry is rich in protein, amino acids, sugars and various trace elements, and has a high COD value. Direct discharge without utilization will not only waste resources, but also increase the cost of pollutant treatment. At present, except for a small amount of amino acid wastewater, which can be used as resources, it is mainly used to prepare amino acid feed and amino acid pesticides. Although this can improve the utilization rate of resources to a certain extent, the utilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 许岗赵翔柳杏辉彭娟花孙超
Owner HUNAN FLAG BIOTECHNOLOGY CO LTD
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