Integrated treatment method of corn alcohol wastewater

A technology of alcohol wastewater and treatment methods, which is applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve the problems of non-standard wastewater, high concentration of suspended solids, and long anaerobic treatment time and other problems, to achieve the effect of low treatment cost, simple operation and high biochemical efficiency

Active Publication Date: 2013-07-10
ZHENGZHOU UNIV
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  • Claims
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Problems solved by technology

However, there are still shortcomings: the anaerobic treatment takes a long time, the initial start-up process of the reactor is slow, and the concentration of suspended solids in the corn alcohol wastewater is high, which limits the operation effect of the anaerobic reactor
Since the implementation of the "Water Pollutant Discharge Standard for Fermented Alcohol and Liquor Industry" in January 2012, the discharge of wastewater pollutants from alcohol factories no longer implements the "Comprehensive Wastewater Discharge Standard" (GB8978-1996). The strict implementation of the standard has caused some alcohol The waste water discharged by the factory sometimes does not meet the standard
At the same time, the anaerobic method and aerobic method have no obvious effect on the color removal of corn alcohol wastewater. Therefore, it is an urgent problem to explore a corn alcohol wastewater treatment process with simple operation, good treatment effect, low investment and low operating cost.

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  • Integrated treatment method of corn alcohol wastewater

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experiment example 1

[0041] A corn alcohol factory in Henan adopts the method of the present invention to treat the waste water of the factory. The raw water COD is about 3500 mg / L, and the designed treatment capacity is 2000m 3 , the surface load of the adjustment pool is 0.8m 3 / m 2 h, the hydraulic retention time is 2.5h, the hydraulic retention time of the hydrolysis regulating tank is 10h, and the volume load of the internal circulation UASB reactor is 4.75 kgCOD / m 3 d, the ascending flow rate is 0.45m / h, and the volume load of the CASS tank is 0.4kgBOD / m 3 d, dissolved oxygen 2.5mg / L, sludge concentration 4500mg / L, aerobic effluent COD average 60mg / L, NH 3 -N average is 0.8mg / L, every treatment 1m 3 The dosage of waste water PAS is 60g, and the multi-media filter is filled with gravel, quartz sand, anthracite and other media from top to bottom. 3 -N is 0.7mg / L on average, meeting the supplementary water requirements for industrial circulating cooling water.

experiment example 2

[0043] A corn alcohol factory in Henan adopts the method of the present invention to treat the waste water of the factory. The raw water COD is about 10000 mg / L, and the designed treatment capacity is 2000m 3 , the surface load of the adjustment pool is 0.8m 3 / m 2 h, the hydraulic retention time is 2.5h, the hydraulic retention time of the hydrolysis regulating tank is 12h, and the volume load of the internal circulation UASB reactor is 13.4 kgCOD / m 3 d, the ascending flow rate is 0.3m / h, and the volume load of the CASS pool is 0.5kgBOD / m 3 d, dissolved oxygen 2.5mg / L, sludge concentration 4500mg / L, aerobic effluent COD average 65mg / L, NH 3 -N is 1.0mg / L on average, every treatment 1m 3 The dosage of waste water PAS is 60g. The multi-media filter is filled with gravel, quartz sand, anthracite and other media from top to bottom. The media filling height is 1.2m. After disinfection treatment, the average COD of effluent is 50mg / L, 3 -N is 0.8mg / L on average, meeting the sup...

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Abstract

The invention relates to an integrated treatment method of corn alcohol wastewater. The method is high in biochemical efficiency, simple to operate and low in treatment cost. Biochemical effluent is superior to a discharge standard of fermentation alcohol wastewater, and deep effluent meets a requirement of make-up water of industrial recycling cooling water. The method comprises the steps that a grid intercepts a thick and big suspended matter; the wastewater is cooled; a pH value of the wastewater is adjusted; the wastewater with the pH value being adjusted is pump into a hydrolytic acidification tank, and subjected to hydrolytic acidification, and then to anaerobic treatment by an internal recycling up-flow anaerobic sludge blanket; partial wastewater after the anaerobic treatment is subjected to aerobic treatment by a filling cyclic activated sludge system method; partial wastewater not subjected to the anaerobic treatment flows back to a water inlet of the up-flow anaerobic sludge blanket, and then enters the up-flow anaerobic sludge blanket for the anaerobic treatment; blasting is required in the aerobic treatment process; and the wastewater after the aerobic treatment enters an intermediate water well, is precipitated in a coagulative precipitation tank, then enters a multi-medium filter for filtering, and is disinfected. The method is simple to operate, low in treatment cost, and high in biochemical efficiency.

Description

Technical field [0001] The invention involves wastewater treatment, especially a method of integrated treatment of corn alcohol waste water. Background technique [0002] Corn alcohol waste water is distilled residue discharged at the bottom of the bottom of the rough distillation tower when the corn is distilled and fermented with raw materials -alcohol waste (high concentration organic wastewater), and the washing water during the production process (medium -concentration organic wastewater) and cooling waterEssenceThe amount of water discharge of corn alcohol waste water is large, and the wastewater discharged from 1 ton of alcohol is 10 to 14 tons, which is an important source of pollution in the alcohol industry.The main pollutants of corn alcohol waste water are CODCR, NH3-N, SS, and their concentrations are between 3000 ~ 15000mg / L, 10 ~ 35mg / L, 800 ~ 2500mg / L.Other pollutants mainly include: oil, starch, and glue that suspended in wastewater; sugar, acid, alkali, salt, et...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 宋宏杰于鲁冀陈涛刘培孔德芳
Owner ZHENGZHOU UNIV
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