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Molasses alcohol waste water decolouring method

A technology for molasses alcohol wastewater and process, which is applied in the field of decolorization of molasses alcohol wastewater, can solve the problems of unsatisfactory comprehensive effect, long reaction time, low decolorization rate and the like, and achieves the effects of low cost, short time consumption and high biochemical efficiency.

Active Publication Date: 2018-08-21
台州中知英健机械自动化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for the decolorization of molasses alcohol wastewater, the overall effect is not very satisfactory, and there are disadvantages such as long reaction time, low decolorization rate, and poor effect.

Method used

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  • Molasses alcohol waste water decolouring method

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Effect test

Embodiment 1

[0020] A kind of molasses alcohol waste water decolorization process, comprises following treatment steps:

[0021] (1) Pretreatment: The CODcr of molasses alcohol wastewater influent is about 12000mg / L, the chroma is about 4000 times, and the design treatment capacity is 1000m 3 / d, the molasses alcohol waste water first passes through the grid to intercept the coarse suspended matter, and then enters the cold heat exchanger for cooling treatment, and is cooled to 42-45°C.

[0022] (2) Entering the regulating pool: the above-mentioned waste water after cooling treatment is passed into the regulating pool, and sodium hydroxide is added to adjust the pH value to 6.8-7.3.

[0023] (3) Entering the flocculation tank: pass the above-mentioned wastewater with adjusted pH value into the sedimentation tank, 3 Add 5-10kg to the waste water and add decolorizer A composed of activated carbon, diatomaceous earth, ethyl hypochlorite, calcium hypochlorite, sodium hypochlorite, polypropyle...

Embodiment 2

[0029] The difference between embodiment 2 and embodiment 1 is only: the CODcr of molasses alcohol wastewater influent is about 15000mg / L, the chroma is about 4500 times, and the design treatment capacity is 1100m 3 / d; the decolorizer A is made up of the following raw materials in parts by weight: 10 parts of activated carbon, 10 parts of diatomaceous earth, 15 parts of ethyl hypochlorite, 10 parts of calcium hypochlorite, 20 parts of sodium hypochlorite, and 7 parts of polyacryl alcohol , 2 parts of chelating agent; Described depigmentation agent B is by volume ratio 1:1 by the bacterium liquid that described decolorizing agent B is made respectively by aspergillus niger, nitrifying bacteria, bacillus subtilis, bacillus licheniformis, sporosporium thermophila, acetic acid bacteria, yeast: 1: 1: 1: 1: 1 mixed, the cell concentration of each bacterial liquid is 1x10 9 cfu / ml.

[0030] After testing, the CODcr of the effluent in this embodiment is 98 mg / L, the chromaticity is ...

Embodiment 3

[0031]The difference between embodiment 3 and embodiment 1 is only: the CODcr of molasses alcohol wastewater influent is about 11000mg / L, the chroma is about 4200 times, and the design treatment capacity is 1300m 3 / d; the decolorizer A is made up of the following raw materials in parts by weight: 5 parts of activated carbon, 5 parts of diatomaceous earth, 10 parts of ethyl hypochlorite, 5 parts of calcium hypochlorite, 8 parts of sodium hypochlorite, and 3 parts of polypropylene alcohol , 0.8 part of chelating agent; The bacterium liquid that described decolorizing agent B is made respectively by Aspergillus niger, nitrifying bacteria, Bacillus subtilis, Bacillus licheniformis, Sporosporium thermophila, acetic acid bacteria, saccharomycete 1.5:1 by volume: 1: 1: 1: 1: 1 mixed, the cell concentration of each bacterial liquid is 1x10 9 cfu / ml.

[0032] After testing, the CODcr of the effluent in this embodiment is 97 mg / L, the chromaticity is 49 times, and the pH value is 7.2....

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Abstract

The invention belongs to the technical field of waste water treatment, and more specifically relates to a molasses alcohol waste water decolouring method. The molasses alcohol waste water decolouringmethod comprises following steps: firstly, molasses waste water is subjected to grating filtering pretreatment, and cold heat exchanger cooling, is introduced into an equalizing tank for adjusting ofan appropriate pH value, and then is introduced into a flocculation basin; a decolorant A is added at the same time for reaction, waste water obtained via flocculation is introduced into a diluting acidying pool, after diluting acidifying, waste water is delivered through a two-stage tandem type upflow anaerobic sludge reactor, and a decolorant B obtained via treatment is added for anaerobic reaction; and then waste water is introduced into an aerobic treatment pool for deposition so as to realize up-to-standard discharge. The molasses alcohol waste water decolouring method is capable of solving problems in the prior art that reaction time is long, decoloring rate is low, and effect is poor; the decoloring effect is excellent, consumed time is short, operation is simple, biochemistry treatment efficiency is high, production cost is low, and no secondary pollution is caused.

Description

【Technical field】 [0001] The invention relates to the technical field of wastewater treatment, in particular to a decolorization process of molasses alcohol wastewater. 【Background technique】 [0002] Molasses alcohol wastewater is the high-concentration and high-color organic wastewater discharged after the alcohol workshop of the sugar factory uses molasses to ferment alcohol. It contains rich protein and other organic substances, and also contains more N, P, K, Ca, Mg Equal inorganic salts and higher concentration of SO4 2- Etc., if it is directly discharged without treatment, it will seriously pollute the water quality and the environment. Therefore, the molasses alcohol wastewater must be treated and can only be discharged after reaching the standard. However, since molasses alcohol wastewater is a type of high-concentration organic wastewater, the content of pigments in wastewater is relatively high, mainly composed of phenolic pigments, melanoids, caramel pigments, e...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/32
CPCC02F1/001C02F1/52C02F1/66C02F3/286C02F3/34C02F3/347C02F9/00C02F2001/007C02F2103/32
Inventor 黄自宇
Owner 台州中知英健机械自动化有限公司
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