Traditional Chinese medicine extraction wastewater treatment system and technology

Abstract

The invention discloses a traditional Chinese medicine extraction wastewater treatment system. According to the invention, a ''pretreatment+hydrolytic acidification+anaerobic treatment+aerobic treatment+Fenton treatment'' combined biological treatment process is adopted. The anaerobic biological treatment process has advantages of low energy consumption, high removal rate and effluent stability. The aerobic biological treatment process has advantages of low investment, mature technology, high efficiency and stable and reliable treatment effect. The system provided by the invention comprises a pretreatment unit, a hydrolytic acidification unit, an anaerobic treatment unit, an aerobic treatment unit and a Fenton treatment unit which are connected in order. The pretreatment unit comprises an equalizing tank I and an equalizing tank II which are connected in series. The hydrolytic acidification unit is a hydrolytic acidification tank. The anaerobic treatment unit is a high-efficiency anaerobic reactor. The aerobic treatment unit is a bio-contact oxidation tank. The Fenton treatment unit is a Fenton reaction tank. A secondary sedimentation tank is arranged between the bio-contact oxidation tank and the Fenton reaction tank which communicates with a clean water tank through an air floatation machine.

Description

technical field [0001] The invention relates to a waste water treatment system, in particular to a traditional Chinese medicine extraction waste water treatment system and process. Background technique [0002] The discharge of traditional Chinese medicine extraction wastewater will inevitably cause serious organic pollution to the receiving water body, and traditional Chinese medicine extraction wastewater has characteristics different from general wastewater: [0003] 1) The composition of wastewater is complex, COD cr 、BOD 5 The average content is high, and an anaerobic reaction structure with high organic matter removal rate, strong impact load resistance and good treatment effect is required; [0004] 2) The discharge of wastewater is irregular. The quality and quantity of wastewater discharged from each workshop are different at different times, and the COD fluctuates greatly, which has a large impact load on wastewater treatment structures, and structures that buffe...

AI Technical Summary

Problems solved by technology

[0003] 1) The composition of wastewater is complex, COD cr 、BOD 5 The average content is high, and an anaerobic reaction structure with high organic matter removal rate, strong impact load resistance and good treatment effect is required;

[0004] 2) The discharge of wastewater is irregular. The quality and quantity of wastewater discharged from each workshop are different at different times, and the COD fluctuates greatly, which has a large impact load on wastewater treatment structures, and structures that buffer the impact of water quality and water volume are required;

[0005] 3) In the production process, there are many traditional Chinese medicine products that need alcohol extraction, and the alcohol in the wastewater mainly comes from the dregs of the medicine, and 70% of the alcohol in the dregs of the medicine is recycled, and this waste water cannot be treated separately;

[0007] Generally speaking, traditional Chinese medicine extraction wastewater has a high concentration of suspended solids, COD cr The concentration is high and the treatment is difficult. Therefore, the traditional wastewater treatment process is difficult to meet the requirements of traditional Chinese medicine extraction wastewater treatment.

[0008] Chinese patent application 201210494742.5 discloses a treatment process for traditional Chinese medicine wastewater. After the traditional Chinese medicine wastewater is pretreated to adjust the pH value of the traditional Chinese medicine wastewater to 8-9, the traditional Chinese medicine wastewater is subjected to anaerobic treatment, reflux biochemical treatment, and filtration and discharge treatment. Combination of treatment methods, traditional Chinese medicine extraction wastewater COD cr High concentration, high content of macromolecular organic matter, direct anaerobic treatment, low removal rate

Biofilm is easy to fall off, needs to be updated frequently and is expensive, the sewage treatment system has high operating costs and high depreciation rate

[0010] Generally speaking, the traditional Chinese medicine treatment process needs to adjust the pH value of wastewater to 8-9 to ensure the normal operation of the sewage treatment process. The anaerobic technology used in the traditional process is immature, and there is a low impact load capacity during operation. , poor acid-base buffering, low sludge load, floor space and other disadvantages. In addition, the aerobic section of the traditional process mostly uses membrane bioreactors. This process requires high technical level of operators, and the membrane needs to be washed regularly. and replacement, increasing the operating costs of the enterprise

Images