Method for treating wastewater containing molasses alcohol

A technology of molasses alcohol wastewater and its treatment method, which is applied in the field of molasses alcohol wastewater treatment, can solve the problems such as ineffective chroma removal effect of molasses alcohol wastewater, slow initial start-up process of reactor, and long anaerobic treatment time, etc. Biochemical properties, low processing costs, and simple operation

Active Publication Date: 2010-06-30
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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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 due to the high organic concentration of the wastewater, the wastewater needs to be diluted before entering the anaerobic reaction.
There are many sulfate ions in the wastewater, resulting in low anaerobic efficiency and high aerobic load. At the same time, the anaerobic method and aerobic method have no obvious effect on the color removal of molasses alcohol wastewater. The treatment method of molasses alcohol wastewater with good treatment effect, low investment and low operating cost is an urgent problem to be solved

Method used

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  • Method for treating wastewater containing molasses alcohol

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Embodiment 1

[0052] A molasses alcohol factory in Guangxi adopts the method of the present invention to treat the waste water of the factory. The raw water COD is about 100000mg / L, and the designed treatment capacity is 2000m 3 / d, the surface load of the sedimentation tank is 0.7m 3 / m 2 h, the hydraulic retention time is 2.5h, the hydraulic retention time of the hydrolysis regulating tank is 8h, and the volume load of the primary anaerobic reactor is 4kgCOD / m 3 d, the volume load of the secondary anaerobic reactor is 12kgCOD / m 3 d. The ascending flow rate is 6m / h, and the volume load of the SBR tank is 0.6kgBOD / m 3 d, dissolved oxygen 2mg / L, sludge concentration 3500mg / L, aerobic effluent COD average 400mg / L, H 2 o 2 The mass ratio of dosing amount to aerobic effluent COD is 2:1; Fe 2+ with H 2 o 2 The molar ratio is 1:18, and the hydraulic retention time in the upflow multiphase wastewater oxidation tower is 0.5h. After air flotation treatment, the average COD of the effluent is ...

Embodiment 2

[0054] A molasses alcohol factory in Guangxi adopts the method of the present invention to treat the waste water of the factory. The raw water COD is about 120000mg / L, and the designed treatment capacity is 1500m 3 / d, the surface load of the sedimentation tank is 0.8m 3 / m 2 h, the hydraulic retention time is 3h, the hydraulic retention time of the hydrolysis regulating tank is 10h, and the volume load of the primary anaerobic reactor is 5kgCOD / m 3 d, the volume load of the secondary anaerobic reactor is 15kgCOD / m 3 d. The ascending flow rate is 8m / h, and the volume load of the SBR pool is 0.8kgBOD / m 3 d, dissolved oxygen 2.5mg / L, sludge concentration 4000mg / L, aerobic effluent COD average 380mg / L, H 2 o 2 The mass ratio of dosing amount to aerobic effluent COD is 3:1; Fe 2+ with H 2 o 2 The molar ratio is 1:20, and the hydraulic retention time in the upflow multi-phase wastewater oxidation tower is 1h. After air flotation treatment, the average COD of the effluent is ...

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Abstract

The invention discloses a method for treating wastewater containing molasses alcohol. The specific process of the method comprises the following steps: firstly, carrying out the coagulation sedimentation pretreatment on the wastewater; further carrying out the two-stage anaerobic treatment on the pre-treated wastewater; then, carrying out the aerobic treatment on the treated wastewater; and finally, carrying out the advanced oxidation treatment on the treated wastewater on the basis of the Fenton advanced oxidation method and air floatation method. The method of the invention has the advantages of simple operation, low treatment cost and high biochemical efficiency, and guarantees that the effluent subjected to the advanced treatment can meet the standards.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating molasses alcohol wastewater. technical background [0002] Molasses alcohol wastewater is waste water that is discharged after the fermentation mash is distilled out of alcohol in the alcohol primary distillation tower after molasses is used as raw material after fermentation. The discharge of molasses alcohol wastewater is large, and the wastewater discharged per ton of alcohol produced is 15-20 tons, which is the most serious source of pollution in the sugar industry. Molasses alcohol wastewater CODcr, BOD 5 The concentration is high, which belongs to high-concentration organic wastewater. Wastewater has high chroma, mostly brownish black, and the pigments contained in it are melanoids and brown pigments, and its main components are caramel pigments, phenolic pigments, polysaccharide decomposition products and amino acid concentration products, etc., w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F3/28C02F3/12C02F1/52C02F1/72C02F103/32
CPCY02W10/10
Inventor 杨崎峰陆立海周永信陈永利
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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