Two-stage anaerobic treatment system for cassava alcohol wastewater

Abstract

The invention discloses a two-stage anaerobic treatment system for cassava alcohol wastewater. The system comprises a primary heat exchanger, a high temperature anaerobic fermentation tank, a primary drum screen, a secondary drum screen, a secondary heat exchanger, a sedimentation pool, an air floatation pool, an adjustment pool and a medium temperature UASB reactor. Wastewater goes by the primary heat exchanger for cooling, enters the high temperature anaerobic fermentation tank for high temperature anaerobic fermentation, goes by the two-stage drum screen, the secondary heat exchanger, the sedimentation pool and the air floatation pool for removing suspending matters and partial COD, and enters the UASB reactor for medium temperature anaerobic fermentation. The system has the following advantages: biogas generated in the two-stage fermentation is collected and used, and wastewater enters a subsequent aerobic segment for continuous treatment; and the whole treatment process flow is concise, the management is convenient, the energy consumption of the production and the operation is low, the treatment efficiency is high, and sludge has a less output and is easy to dispose.

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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