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Method for treating cefalexin enzyme-process synthesizing mother liquor wastewater

A cephalexin enzymatic method and a technology for synthesizing mother liquor are applied in the field of treatment of wastewater from cephalexin enzymatic synthesis of mother liquor, which can solve problems such as unsuitability for wastewater treatment, and achieve the effects of improving system operation stability, ensuring recovery rate and reducing treatment costs.

Active Publication Date: 2014-09-24
浙江佰辰低碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method disclosed in this invention is not suitable for the treatment of waste water with high salinity and high organic content produced during the enzymatic synthesis of cephalexin containing complex organic components.

Method used

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  • Method for treating cefalexin enzyme-process synthesizing mother liquor wastewater
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  • Method for treating cefalexin enzyme-process synthesizing mother liquor wastewater

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Experimental program
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Effect test

Embodiment 1

[0028] refer to figure 1 .

[0029] The mother liquor wastewater synthesized by cephalexin enzymatic method is treated by an electrodialysis integrated reverse osmosis system. The electrodialysis integrated reverse osmosis system is composed of primary electrodialysis equipment, secondary electrodialysis equipment, reverse osmosis device and MVR crystallization evaporator. The first-stage electrodialysis equipment is composed of anolyte chambers on both sides and an electrodialysis compartment sandwiched between the anolyte chambers on both sides. The electrodialysis compartment is composed of a concentration chamber and a desalination chamber composed of anion exchange membranes and cation exchange membranes arranged at intervals The concentrating chamber and the desalination chamber are equipped with a feed port and a liquid outlet; the electrodialysis compartment is provided with a circulation coil that can be fed into circulating frozen brine, and the anode liquid chamber ...

Embodiment 2

[0033] Taking the mother liquor wastewater produced by the process of preparing cephalexin by biological enzymatic method as the treatment object, a pilot test was carried out: the process of preparing cephalexin by biological enzymatic method mainly includes: obtaining side chains from benzaldehyde through chemical synthesis and enzymatic resolution; Through biological fermentation, chemical ring expansion, and enzymatic cleavage of the mold, the mother nucleus 7-aminodeacetoxycephalosporanic acid (7-ADCA) is obtained; the mother nucleus and the side chain are condensed by enzymes to obtain the cephalexin raw material; the acid / alkali crystallization separation method Obtain cephalexin product and mother liquor wastewater. Ammonium sulfate is about 43.31g / L, electrical conductivity is about 64.23ms / cm, biochemical oxygen consumption (COD) is about 128.00g / L, and ammonia nitrogen (NH3-N) is about 12.35 in the mother liquid waste water of described cephalexin enzymatic method. ...

Embodiment 3

[0041]Taking the mother liquor wastewater produced by the process of preparing cephalexin by biological enzyme method as the experimental object, the pilot test was carried out:

[0042] The process for preparing cephalexin by the biological enzymatic method mainly includes: obtaining side chains from benzaldehyde through chemical synthesis and enzymatic splitting; Alkanoic acid (7-ADCA); the cephalexin raw material is obtained by enzymatic condensation of the mother nucleus and the side chain; the cephalexin product and mother liquor wastewater are obtained by acid / alkali crystallization separation.

[0043] The ammonium sulfate of the mother liquor wastewater of the cephalexin enzymatic method is about 48.65g / L, the electrical conductivity is about 68.47ms / cm, the biochemical oxygen consumption (COD) is about 122.00g / L, and ammonia nitrogen (NH3-N) is about 11.72g / L.

[0044] The 40L cephalexin enzymatic mother liquor filtered through the PP cotton microporous filter eleme...

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Abstract

The invention discloses a method for treating cefalexin enzyme-process synthesizing mother liquor wastewater. The mother liquor wastewater is treated by adopting an electroosmosis integrated reverse osmosis system, wherein the electroosmosis integrated reverse osmosis system consists of primary electroosmosis equipment, secondary electroosmosis equipment, a reverse osmosis device and crystallization equipment. The method disclosed by the invention adopts a reverse osmosis technology to recycle water resources in secondary electroosmosis desalted mother liquor, and to recycle the water to an electroosmosis system as the secondary electroosmosis system concentration room inlet water, realizes comprehensive utilization of wastewater resources, minimizes environmental influences and lowers treatment cost.

Description

(1) Technical field [0001] The invention relates to a method for treating waste water with high salt content and high organic content, in particular to a method for treating waste water from cephalexin enzymatic synthesis of mother liquor. (2) Background technology [0002] Cefalexin (cephalexin, cephalosporin IV, Cephalexin) is a broad-spectrum antibiotic, a class of semi-synthetic antibiotics with a large amount of clinical use at present, and a class of main products in cephalosporin antibiotics. The synthesis methods of cephalexin mainly include chemical synthesis and biological enzymatic synthesis. The method of enzymatic synthesis of cephalexin is different from the traditional chemical synthesis method in terms of excipients and processes, avoiding the use of pyridine, pivaloyl chloride, N,N dimethylformamide (DMF) and other toxic and harmful substances in the reaction process, and the process route Simple, mild reaction conditions. With the rapid development of bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/469C02F1/44
CPCY02A20/124Y02A20/131
Inventor 沈江南黄杰阮慧敏叶树祥
Owner 浙江佰辰低碳科技有限公司
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