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Pretreatment method for molasses alcohol wastewater

A technology for molasses alcohol wastewater and pretreatment, which is applied in the fields of food industry wastewater treatment, natural water treatment, special compound water treatment, etc. problem, to achieve the effect of significant treatment effect, short time and unique method

Inactive Publication Date: 2016-07-06
CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: the pigment content in the current molasses alcohol wastewater is extremely high, which is difficult to remove, while the concentration and incineration method requires large equipment investment and high energy consumption during the evaporation process in the traditional method. Equipment corrosion and fouling are serious, while the biochemical anaerobic treatment takes a long time, the efficiency is low, and the removal rate is not obvious. A method is provided to soak the sorghum distiller's grains in high-concentration ethanol after anaerobic fermentation, and then add Aspergillus, After growing bacteria, collect mycelia and put them into wastewater, add sodium thiosulfate, continue anaerobic fermentation until foaming, and finally perform aerobic treatment on the foaming wastewater to obtain a pretreatment method for molasses alcohol wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First, weigh 600g of distiller's grains discarded after brewing sorghum wine, put them into a fermenter, and pour 60% water of distiller's grains into it, mix well, seal the fermenter, and ferment at a temperature of 35°C and a relative air humidity of 50%. After 5 days, when the fermentation is over, raise the temperature of the fermenter to 38°C, and the relative humidity of the air to 55%, and continue to seal the fermentation until the mixture in the fermenter becomes white foam; Slowly add 90% ethanol solution to the fermenter at a rate of 100mL / min, keep stirring during the addition until the fermentation mixture is completely submerged, seal and stand at room temperature for 1 day, then add fermented Mix aspergillus with a mass of 2%, mix evenly, cover the mouth of the fermenter with gauze, place it at a temperature of 25°C, and a relative air humidity of 65%, so that it can grow mold naturally; then when the above mixture grows mold, select a mass concentration o...

example 2

[0023]First, weigh 700g of distiller's grains discarded after brewing sorghum wine, put them into a fermenter, and pour 65% of distiller's grains into it, mix well, seal the fermenter, and ferment at a temperature of 45°C and a relative humidity of 55%. 8 days, when the fermentation is over, raise the temperature of the fermenter to 45°C, and the relative humidity of the air to 60%, and continue to seal and ferment until the mixture in the fermenter has white foam; Slowly add 90% ethanol solution into the fermentor at a rate of 150mL / min, and keep stirring during the addition until the fermentation mixture is completely submerged. After sealing and standing at room temperature for 1.5 days, add fermented Mix to a mass of 2.5% Aspergillus, mix evenly, cover the mouth of the fermenter with gauze, place it at a temperature of 30°C, and a relative air humidity of 68%, so that it can grow mold naturally; then when the above mixture grows mold, select a mass concentration of 45% ace...

example 3

[0026] First, weigh 800g of distiller's grains discarded after brewing sorghum wine, put them into a fermenter, and pour 70% water of distiller's grains into it, mix well, seal the fermenter, and ferment at a temperature of 50°C and a relative air humidity of 60%. For 10 days, after the fermentation is over, raise the temperature of the fermenter to 55°C, and the relative humidity of the air to 65%, and continue to seal and ferment until the mixture in the fermenter becomes white foam; Slowly add 90% ethanol solution to the fermentor at a rate of 200mL / min, keep stirring during the addition until the fermentation mixture is completely submerged, seal and stand at room temperature for 2 days, then add fermented Mix aspergillus with a mass of 3%, mix evenly, cover the mouth of the fermenter with gauze, and place it at a temperature of 32°C and a relative air humidity of 70% to allow it to grow mold naturally; then when the above mixture grows mold, select a mass concentration of ...

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Abstract

The invention discloses a pretreatment method for molasses alcohol wastewater, belonging to the technical field of wastewater treatment. In the present invention, the sorghum distiller's grains are soaked in high-concentration ethanol after anaerobic fermentation, and then Aspergillus is added to collect the mycelia into the waste water after the fungus grows, and sodium thiosulfate is added to continue the anaerobic fermentation until foaming, and finally the foaming The wastewater is aerobically treated to obtain a pretreatment method for molasses alcohol wastewater. Examples prove that the present invention is easy to operate and has low treatment costs. In the process of treatment, not only does not need special equipment, there is no corrosion and fouling problem for the equipment, but also the anaerobic fermentation time is short, which shortens the treatment time and finally makes the molasses alcohol wastewater The viscosity has been reduced by more than 86%, and the decolorization rate has reached more than 99.97%, reaching the national wastewater discharge standard.

Description

technical field [0001] The invention discloses a pretreatment method for molasses alcohol wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Molasses alcohol wastewater is a high-concentration organic wastewater produced in the process of fermenting and producing alcohol, using molasses, a by-product of sugar factory sugar production, as raw material. The output of this kind of wastewater is large, about 10-15 tons of wastewater is produced for every ton of alcohol produced. per production 1m 3 The aerobic organic matter discharged from alcohol is 0.6-1m3. Sugarcane molasses alcohol wastewater is a dark brown viscous acid wastewater with high solids, high concentration of organic matter, and high chroma. The content of COD and BOD is high, and the melanoid and brown pigment contained in it are difficult to be degraded by microorganisms. Therefore, decolorization is a difficult point in processing. The refractory molasses ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/30C02F103/32
CPCC02F3/34C02F3/30C02F2103/325C02F2305/06
Inventor 裴俊张明
Owner CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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