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Anaerobic fermentation method and device of alcohol waste Liquid

A technology of anaerobic fermentation and anaerobic fermentation tank, which is applied in the field of enzyme treatment of waste liquid, can solve problems such as difficulties, and achieve the effects of saving energy, good mass transfer effect, and improving speed and efficiency

Inactive Publication Date: 2008-10-08
YUNFU JIUFANG AGRI TECH DEV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, the above two processes bring certain difficulties and limitations to the popularization and application of anaerobic fermentation of distiller's grains

Method used

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  • Anaerobic fermentation method and device of alcohol waste Liquid
  • Anaerobic fermentation method and device of alcohol waste Liquid
  • Anaerobic fermentation method and device of alcohol waste Liquid

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Embodiment Construction

[0028] According to the technological process shown in Figure 3 and the equipment process shown in Figure 4, a production line device for anaerobic fermentation of distiller's grains with an annual output of 10,000 tons of alcohol is installed. In this device, distiller's grains are separated into sediment and No. 1 supernatant through the distiller's grains settling tank 2. Anaerobic fermentation tank 13 inside. This feeding method is called the "double flow addition" method. When the extracted digestive juice enters the clear liquid anaerobic fermentation tank 13, a series connection between two tanks is adopted. The material entering the fermenter is not only stirred by the eddy current of the water distributor, but also the biogas sucked by the jet pump strengthens the stirring. In the two anaerobic fermentation tanks, the total hydraulic retention period is 16 days, which makes the anaerobic fermentation technology tend to be "big anaerobic". In the sediment anaerobic ...

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Abstract

The invention relates to a method of anaerobic fermentation for alcohol lees liquid and the device thereof. The invention comprises a <double current> method and two fermentation devices. The alcohol lees liquid is separated into supernatant and sediment after precipitating, according to parallel <double current> method, the sediment enters a sediment anaerobic fermentation tank after being blended, and the supernatant enters a supernatant anaerobic fermentation tank after being blended; under specified working conditions, the sediment is performed anaerobic fermentation of hydrolization, acidification and methanation, and the supernatant is performed methanation anaerobic fermentation; a part of digestive juice in the sediment fermentation tank is flowed back to be blended and the other part flows into the supernatant fermentation tank, the digestive juice of the tank enters a clarification tank, digest sludge is precipitated, to flow back to be blended, and the supernatant is performed subsequent treatment; the excess sludge at the bottom of the two tanks is discharged aperiodically; water distributors are installed on the fermentation tanks, a water jet pump is collocated for feeding feed liquid, the mass transfer of the anaerobic fermentation and the heat transfer efficiency are enhanced, the invention is energy and investment conservation, and can increase the biogas output and enhance the removal rate of COD. The invention is suitable for treating organic wastewater in a way of anaerobic fermentation.

Description

technical field [0001] The invention relates to a method and a device for using enzymes to treat waste liquid, in particular to anaerobic fermentation of distiller's grains. technical background [0002] The process of producing alcohol from fresh or sun-dried potatoes through crushing, mixing, liquefaction, saccharification, fermentation, distillation and other processes produces as much as 12 to 15 times the distiller's grains, causing a large amount of waste liquid to pollute the environment. In order to deal with this large amount of waste liquid, anaerobic fermentation is usually used to produce biogas to realize waste utilization. The technology of anaerobic fermentation of distillers' grains to produce biogas has been widely used in the treatment of potato distillers' grains. But in the "new" waste liquid after biogas production, COD cr Still pretty high. Chinese Patent Application No. 91106371.4 "A Method for High-temperature Cooking and Full Reuse of Dried Potato...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12M1/107C02F3/34C02F103/36
CPCC12M33/22Y02E50/343C12M29/18C12M21/12C12M23/58C12M33/04C12M47/18C12M21/04C12M47/00Y02E50/30
Inventor 周兴国
Owner YUNFU JIUFANG AGRI TECH DEV
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