Comprehensive treatment method for sewage of cigarette factory

Abstract

The invention discloses a comprehensive treatment method for sewage of a cigarette factory. According to the comprehensive treatment method, sewage is introduced into a grating channel through an open channel to be filtered, then the filtered sewage is introduced into a water collection well; sewage in the water collection well is pumped into an adjustment tank; the sewage in the adjustment tank is pumped into an efficient air floatation tank to be subjected to solid-liquid separation, and water subjected to solid-liquid separation enters an effluent stabilizing region; after being subjected to air floatation, the effluent flows into a hydrolysis acidification tank and enters an MBR tank; after reacting in the MBR tank, liquid is subjected to mud-water separation by virtue of an MBR membrane assembly, isolated activated sludge flows back to the MBR tank, and filtered liquid enters a second clean water tank; disinfected liquid is pumped into an RO system, effluent of the RO system enters a product water tank and is supplemented to a circular cooling water system through a third frequency-variable water supply pump; and sludge discharged from the efficient air floatation tank, the hydrolysis acidification tank and the MBR tank enters the same sludge concentration tank and is dehydrated through an overlapped screw type dehydration machine. The comprehensive treatment method has a good biochemical effect, the effluent can be directly reused, reclaimed water treatment processes can be selected according to water seasons and time frames, and the operation is positive and stable.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a comprehensive treatment method for cigarette factory sewage, which belongs to the field of sewage treatment. Background technique [0002] The main sources of waste water from cigarette factories are production waste water and domestic sewage. In the early stage of cigarette production, the sewage mainly includes the process water for expanding shredded tobacco and the process water for washing stems. Between 60 and 70 ℃; the adhesive used in the middle stage of production forms turbid white glue sewage, and the COD is about 2000mg / L; in the later stage of cigarette production, the sewage produced by the spice workshop, because it contains spices and flavors added to cigarettes At the same time, some engine oils lead to a higher concentration of pollutants in cigarette production wastewater and higher chroma. At the same time, wastewater contains alkaloids, phenols, alcohols and ot...

AI Technical Summary

Problems solved by technology

Most of the tobacco factories also have defects such as high cost of reuse water treatment, outdated treatment process of reclaimed water, substandard effluent quality, high salt content, and low utilization rate.

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