A two-stage anaerobic treatment system for cassava alcohol wastewater

Abstract

The invention discloses a two-stage anaerobic treatment system for cassava alcohol wastewater, comprising a primary heat exchanger, a high-temperature anaerobic fermentation tank, a primary drum screen, a secondary drum screen, a secondary heat exchanger, a sedimentation tank, and an air flotation tank , regulating pool, medium temperature UASB reactor. The waste water enters the high-temperature anaerobic fermentation tank for high-temperature anaerobic fermentation after being cooled by the primary heat exchanger, and then enters the UASB for medium-temperature anaerobic fermentation after passing through two-stage drum sieves, secondary heat exchangers, and sedimentation air flotation to remove suspended solids and part of COD fermentation. The advantages of the system are: the biogas generated by the two-stage anaerobic process is collected and utilized, and the wastewater enters the subsequent aerobic stage for further treatment; the entire treatment process is simple, easy to manage, low energy consumption in production and operation, high in treatment efficiency, less in sludge output and easy to dispose of .

Description

technical field [0001] The invention relates to the technical field of high-concentration organic wastewater anaerobic treatment process, in particular to a two-stage anaerobic treatment system for cassava alcohol wastewater, and in particular to a system connection structure. Background technique [0002] At present, my country's alcohol fermentation production mainly uses corn, rice, wheat and other grain crops as raw materials, resulting in high production costs. Cassava is abundant in southern my country. It has high starch content and is easy to grow. It is resistant to drought and barrenness. It does not compete with food crops for arable land and is cheap. It is the preferred raw material for bioethanol production. Cassava alcohol can be widely used in medicine, chemical industry, food and other industries, and can be used as renewable energy and clean energy. However, in the process of using fresh cassava or dried cassava as raw material to ferment and produce alcoho...

AI Technical Summary

Problems solved by technology

Cassava alcohol can be widely used in medicine, chemical industry, food and other industries, and can be used as renewable energy and clean energy. However, in the process of using fresh cassava or dried cassava as raw material to ferment and produce alcohol, the fermented mash is steamed in the distillation tower. After the alcohol is produced, it is discharged as waste water. About 15 tons of waste water needs to be discharged for every ton of alcohol produced. The composition of the waste water is complex and acidic

[0003] Alcohol waste water is an important source of water pollution. Direct discharge without treatment will cause serious pollution to the environment. Waste of resources and environmental pollution have gradually become the main factors restricting the rapid development of the alcohol industry.

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