Wastewater advanced treatment system for corn processing

Abstract

The invention relates to a wastewater advanced treatment system for corn processing. The wastewater advanced treatment system comprises a wastewater adjustment tank, an enhanced air flotation tank, an ozonation sedimentation tank, a baffled anoxic / anaerobic reaction tank, a completely mixed aerobic tank, a secondary sedimentation tank and a multilayer aerobic activity filtration tower, wherein the enhanced air flotation tank comprises a mud and sand area, a mixing area and a separation area from bottom to top; the ozonation sedimentation tank comprises an aeration mixing area and a sedimentation area; the baffled anoxic / anaerobic reaction tank is divided by baffles into a facultative section, an anoxic section and an anaerobic section; a water inlet pipe, a water distribution cone and an aeration adjustment and control system are arranged in the completely mixed aerobic tank; wastewater enters the wastewater adjustment tank, and the adjusted wastewater enters into the enhanced air flotation tank for scum removing; the wastewater without scum enters the ozonation sedimentation tank for pollutant oxygenolysis; the wastewater subjected to pollutant oxygenolysis enters the baffled anoxic / anaerobic reaction tank and the completely mixed aerobic tank for anoxic, anaerobic and aerobic reactions; the wastewater subjected to the anoxic, anaerobic and aerobic reactions enters the multilayer aerobic activity filtration tower for filtration, and then the filtered wastewater can be recycled.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an advanced treatment system for corn processing wastewater. Background technique [0002] Corn is one of the main food crops in the world. It has attracted extensive attention because of its abundant output and renewable resource advantages. The corn processing industry is also known as the "golden" industry. In recent years, my country's corn processing industry has developed rapidly, making significant contributions to increasing the added value of corn, stabilizing the economy of corn-producing areas, and serving agriculture, rural areas and farmers. However, a variety of pollutants are discharged during corn processing. The discharged wastewater mainly contains starch, protein and sugar. The COD value of the wastewater is generally 8000-25000mg / L, the BOD value is 5000-18000mg / L, and the SS value is 3000. -4500mg / L, with a pH value of 4-6, which belongs to acid...

AI Technical Summary

Problems solved by technology

However, a variety of pollutants are discharged during corn processing. The discharged wastewater mainly contains starch, protein and sugar. The COD value of the wastewater is generally 8000-25000mg / L, the BOD value is 5000-18000mg / L, and the SS value is 3000. -4500mg / L, pH value 4-6, belongs to acidic high-concentration organic wastewater, so corn processing enterprises become major polluters, and terminal treatment is very difficult

If the wastewater is not properly treated and discharged into the water body, it will cause serious water pollution

[0003] At present, most corn processing enterprises use anaerobic-aerobic biological combination process for wastewater treatment. Although COD can be removed in practical engineering applications, the impact resistance of the wastewater treatment system is poor, and it is difficult to ensure stable and efficient removal of pollutants; MBR process The treatment of corn processing wastewater has achieved good results, but the cost is high

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