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A kind of processing method of cellulosic ethanol fermentation waste liquid

A technology for cellulosic ethanol and fermentation waste liquid, applied in the field of water treatment, can solve the problems of high investment and operating costs, large area of ​​aerobic process, incomplete degradation of organic matter, etc., to save investment and operating costs, and improve efficiency. Effect

Active Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The concentration of COD in cellulose ethanol fermentation waste liquid is about 120,000 to 150,000 mg / L. The conventional anaerobic process does not completely degrade organic matter, resulting in a large area for the subsequent aerobic process and high investment and operating costs.
In addition, the B / C ratio in cellulosic ethanol wastewater is about 0.45-0.55, and the organic substances that are difficult to biodegrade are mainly aromatic compounds, and the chromaticity of the wastewater is relatively high. Therefore, biochemical treatment alone cannot meet the stable chromaticity and COD standards emission requirements

Method used

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  • A kind of processing method of cellulosic ethanol fermentation waste liquid
  • A kind of processing method of cellulosic ethanol fermentation waste liquid

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Experimental program
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Effect test

Embodiment 1

[0026] Adopt the present invention to attach figure 1 processing methods and figure 2 The high-efficiency pressure anaerobic reactor is used to treat the fermentation waste liquid produced by a medium-scale test-scale cellulosic ethanol production device in China. The device uses corn stalks as raw materials, and mainly adopts processes such as steam acid explosion pretreatment, enzymatic hydrolysis, sugar solution fermentation, ethanol concentration and rectification purification to produce cellulose ethanol. The main pollutants in the cellulosic ethanol fermentation waste liquid are COD 129050mg / L, sulfate 9920mg / L, chromaticity 12000 degrees, C:N:P=681:4.8:1, additional nutrients such as N and P must be supplemented, Make C:N:P reach 200:5:1 to meet the needs of biochemical treatment.

[0027] Table 1 Main processing unit composition and processing effect of Embodiment 1

[0028] Handling unit name Processing device scale and main components Main operating...

Embodiment 2

[0031] Using the treatment device in Implementation 1 to treat the same sewage as in Example 1, see Table 2 for the wastewater treatment effects obtained by changing the operating conditions of each treatment unit.

[0032] Main processing unit constitution and processing effect of table 2 embodiment 2

[0033] Handling unit name Processing device scale and main components Main operating conditions and control parameters Treatment effluent or effect Iron filings pretreatment pool The effective volume of the reactor is 5L, and the material is plexiglass, mainly including perforated gas distribution plate, overflow weir, DO online instrument, and the filling ratio of iron filings is 50%. The bottom is continuously fed with water, the flow rate of water is 1L / h, the residence time of wastewater is 5h, and DO is kept at 0.2-0.5mg / L, and the top overflows. The effluent COD is 126000mg / L, the sulfate is 9250mg / L, the color is 12000 degrees, and the total Fe ...

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Abstract

The invention provides a cellulose ethanol fermentation waste liquor treatment method. According to the treatment method, high-concentration and high salt-containing fermentation waste liquor produced in a fermentation method for producing ethanol by using various cellulose as a raw material is subjected to combined treatment procedures of iron scale pretreatment, efficient pressure anaerobic treatment, Fenton oxidation treatment, flocculation treatment and filtration treatment, and the treated outlet water can meet the discharge standard requirements. The treatment method provided by the invention can make full use of the efficiency of the anaerobic biochemical treatment, so that biodegradable organic matters in the waste water can be effectively removed, thereby eliminating follow-up aerobic biochemical treatment and reducing the investment and running cost; in addition, an efficient pressure anaerobic reactor can improve the conversion efficiency of the organic matters to methane, so that requirements on circulating economy, cleaner production and the like can be met.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a treatment method for high-concentration cellulose ethanol fermentation waste liquid. Background technique [0002] The anaerobic treatment technology of wastewater is the direction of rapid development in the field of wastewater treatment in recent years. Compared with aerobic treatment, anaerobic treatment has the advantages of small footprint, low energy consumption, low sludge production, and can recover biogas energy, etc. . At present, the third-generation anaerobic reactors are mainly used in industry, such as internal circulation anaerobic reactor IC, anaerobic granular sludge expanded bed reactor EGSB and other high-efficiency anaerobic reactors with high volume load and short hydraulic retention time. reactor. However, most types of anaerobic reactors are operated under normal pressure. Since the water inlet and outlet are directly connected to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 张蕾李宝忠郭宏山许莹朱卫
Owner CHINA PETROLEUM & CHEM CORP
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