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Flocculation pretreatment method for penicillin fermentation waste water

A penicillin fermentation and pretreatment technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, neutralization water/sewage treatment, etc., can solve problems such as complex process, achieve reduction of biological inhibitory substances, Improved degradability and stable effect

Active Publication Date: 2011-12-28
河北协同环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to set up a heat exchanger and a barium mud tank to cool down the wastewater and desulfurize it by precipitation, and the process is complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Penicillin fermented liquid is not filtered and extracted from the raffinate phase after high-temperature distillation. The temperature of the still residue is 74°C, the pH is 2.5, and the measured COD is 54580mg / L, SS is 23385mg / L, SO 4 2- The content is 6200mg / L, and the treatment process is as follows: firstly, Ca(OH)2 is added to the residual liquid, and the pH value of the residual liquid is adjusted to 10, and Ca(OH) 2 While adjusting the electrical properties and pH of the raffinate itself, the SO2 in the raffinate 4 2- React to generate slightly soluble calcium sulfate precipitate; then add 280 mg / L cationic polyacrylamide with a concentration of 0.15%, and after mixing and flocculating for 3 minutes, insoluble substances such as suspended solids, colloids, and precipitates in the still raffinate will form dehydration. Good flocs; then pass the reacted still residue into a belt filter press for solid-liquid separation, so that the COD of the supernatant obtain...

Embodiment 2

[0029] The still raffinate after the high-temperature distillation of the raffinate phase of the penicillin fermentation liquid extraction process without filtration, the temperature of the still raffinate is 72°C, the pH is 2.5, the measured COD is 52600mg / L, and the SS is 20150mg / L. The treatment process is as follows: first Add polymeric silicic acid to the residual liquid of the kettle, the amount of polymeric silicic acid added is 8.5g / L, after fully stirring and mixing, react, then add 450mg / L of cationic polyacrylamide with a concentration of 0.2%, and mix and flocculate for 3min, then react The final residual liquid is passed into a decanter centrifuge for solid-liquid separation. The COD in the supernatant obtained in this way is reduced to 22310 mg / L, the SS content is reduced to 660 mg / L, and the water content of the mud cake is 70%. The removal rates of COD and SS were 56.1% and 96.7%, respectively.

[0030] Wherein the preparation method of polymeric silicic acid ...

Embodiment 3

[0032]The still raffinate after the high-temperature distillation of the raffinate phase of the penicillin fermentation liquid extraction process without filtration, the temperature of the still raffinate is 74°C, the pH is 2.5, the measured COD is 55012mg / L, and the SS is 23310mg / L. The treatment process is as follows: first Add 500 mg / L of 5% tannin to the residual liquid, then add 400 mg / L of cationic polyacrylamide with a concentration of 0.2%, mix and flocculate for 4 minutes, and then pass the residual liquid after the reaction into a decanter centrifuge Machine for solid-liquid separation, the COD of the supernatant obtained in this way is reduced to 23710mg / L, the SS content is reduced to 210mg / L, and the water content of the mud cake is 80%. The removal rates of COD and SS were 56.9% and 99.1%, respectively.

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Abstract

The invention discloses a flocculation pretreatment method for penicillin fermentation waste water, which is suitable for the pre-treatment of high-concentration bacterium slurry residual liquid generated in a penicillin fermentation process and mainly comprises the following steps: a, adjusting the quality of the waste water with a counter-ion auxiliary agent; b, performing flocculation reaction with a high-molecular organic flocculating agent, namely polyacrylamide; and c, performing solid-liquid separation. The counter-ion auxiliary agent is one of CaO, Ca(OH)2, polymeric silicate, polyaluminium chloride or tannin. By the method, the content of SS and COD in the waste water, which affect biochemical treatment, can be greatly decreased; subsequent biochemical treatment difficulty is effectively reduced; the treated waste water can meet the requirements of the subsequent biochemical treatment; and the water content of sludge cakes after the solid-liquid separation is more lower at the same time. Compared with other pre-treatment methods for the waste water generated in a penicillin production process, the method of the invention has better effect and more simple operation.

Description

technical field [0001] The invention belongs to the field of sewage treatment control engineering, in particular to a flocculation pretreatment method for penicillin fermentation wastewater. Background technique [0002] At present, there are more than 300 antibiotic production enterprises in my country, which can produce 70 varieties of antibiotics accounting for 20% to 30% of the world's output. The output is increasing year by year, and it has become one of the world's major antibiotic preparation countries. The waste water discharged from the antibiotic products produced by the microbial fermentation method has a high residual microbial content, and the COD value reaches tens of thousands or even hundreds of thousands of milligrams per liter, and the composition contained in the waste water is extremely complex, containing a large number of polymer heterocycles and poor biodegradability It is difficult to directly enter the biochemical system for processing. Fermentatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/56
Inventor 刘洪泉石亚静卢琼赵永强
Owner 河北协同环境科技有限公司
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