Method for multistage anaerobic treatment of etimicin sulfate production wastewater

Abstract

The invention discloses a method for multistage anaerobic treatment, which belongs to the field of wastewater treatment and aims to provide a treatment method for the production wastewater of etimicinsulfate, which effectively improves the treatment efficiency. The method is characterized in that the method comprises the following steps: step 1, the wastewater from etimicin sulfate production enters a hydrolysis acidification tank for acidification; step 2, effluent of the hydrolysis acidification tank enters a first stage anaerobic reactor; step 3, the effluent of the first stage anaerobic reactor overflows into an intermediate tank for the pH value adjustment; step 4, the effluent of the intermediate tank is divided into two parts, the first part flows into a multistage anaerobic reactor, and the overflow water from the top of the multistage reactor is the final effluent, the second part flows back to the hydrolysis acidification tank and is mixed with the etimicin sulfate production wastewater; operations of steps 1 to 4 are repeated. By adopting a hydrolytic acidification coupled tandem anaerobic reflow process according to the invention, an anaerobic biological treatment is performed on the etimicin sulfate wastewater, thereby greatly reducing COD and residual antibiotics in the wastewater.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a method for multistage anaerobic treatment of waste water produced by etimicin sulfate. Background technique [0002] Etimicin sulfate is an aminoglycoside antibiotic commonly used clinically, mainly composed of gentamicin C 1a It is obtained after chemical synthesis, and a large amount of synthetic wastewater is produced in the production process, and a part of gentamicin C remains in the wastewater 1a , while gentamicin C 1a It has a strong inhibitory effect on both Gram-positive bacteria and negative bacteria. If the high-concentration wastewater is directly anaerobically treated, the COD removal effect is often poor, resulting in high COD in the effluent. At the same time, due to the lack of nutrients in chemically synthesized wastewater, the efficiency of biological treatment for chemically synthesized wastewater is usually low. [0003] Chinese patent CN 104986853A,...

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Problems solved by technology

[0002] Etimicin sulfate is an aminoglycoside antibiotic commonly used clinically, mainly composed of gentamicin C 1a It is obtained after chemical synthesis, and a large amount of synthetic wastewater is produced in the production process, and a part of gentamicin C remains in the wastewater 1a , while gentamicin C 1a It has a strong inhibitory effect on both Gram-positive bacteria and negative bacteria. If the high-concentration wastewater is directly anaerobically treated, the COD removal effect is often poor, resulting in high COD in the effluent

At the same time, due to the lack of nutrients in chemically synthesized wastewater, the efficiency of biological treatment for chemically synthesized wastewater is usually low

[0003] Chinese patent CN 104986853A, a method for treating spiramycin fermentation wastewater, reports a treatment method for multistage anaerobic reactors for spiramycin fermentation wastewater; the method mainly uses pretreatment of anaerobic sludge, control of multistage anaerobic The pH and sludge concentration in the oxygen reactor are used to improve the treatment effect of spiramycin fermentation wastewater, but this method does not take into account the problem that the lack of nutrients in the wastewater leads to the reduction of anaerobic treatment effect. When the treatment object is chemical When synthesizing wastewater, the nutrient elements in the chemically synthesized wastewater are more scarce than the fermentation wastewater reported in the CN 104986853A patent, and the treatment is more difficult; Anaerobic biological treatment process capable of removing residual antibiotics in water

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