A kind of neomycin sulfate production wastewater treatment method

Abstract

A method for treating wastewater produced by neomycin sulfate, comprising the following steps: (1), adjusting water quality and quantity; (2), solid-liquid separation of wastewater; (3), electrochemical reaction; (4), removing sulfate; (5) ), desulfurization; (6), COD and BOD removal; (7), comprehensive adjustment of water quality and quantity; (8), ozone oxidation; (9), AAO process; (10), secondary precipitation; (11), sludge (12), flocculation and sedimentation. The invention improves the biodegradability of neomycin sulfate production wastewater, removes high sulfate radicals, most of the ammonia nitrogen and TP in the water, and saves the area of ​​investment and operating costs and reduces the follow-up costs on the basis of giving full play to the advantages of anaerobic treatment. Oxygen biochemical process stage is difficult to deal with, and has good social and economic benefits.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a neomycin sulfate production waste water treatment device. Background technique [0002] The production of neomycin sulfate belongs to the fermentation pharmaceutical process. The wastewater is characterized by high and low concentration wastewater. The high concentration wastewater is mainly the extraction wastewater generated during the production process of neomycin sulfate. The COD (chemical oxygen demand) is as high as 15000-20000mg / L, BOD (biological oxygen demand) is low, the content is 8000-10000mg / L, the biodegradability is average, the ammonia nitrogen content is 1300-2000mg / L, TP (total phosphorus content) is 150-200mg / L, and the sulfate radical is 10000 -15000mg / L, the content is relatively high, and the water quality and quantity change greatly with high concentration, and most of them contain refractory biodegradable substances and microbial growth inhibitors. Due to the ...

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Problems solved by technology

Due to the high COD of the raw water, the anaerobic process should be preferred to reduce the COD concentration of the raw water, but the high sulfate concentration in the wastewater will cause SRB (sulfate reducing bacteria) to compete with anaerobic methanogens for substrates, thereby inhibiting anaerobic The growth of methanogenic bacteria in the reactor, even causing the paralysis of the anaerobic reactor in severe cases

The conventional two-phase anaerobic process can only remove high sulfate and high COD wastewater, while the extraction wastewater in the production process of neomycin sulfate also has the characteristics of high SS, high P (phosphorus), and high ammonia nitrogen, and its concentration has far exceeded The influent load of the conventional AAO biochemical system, if high-P and high-ammonia-nitrogen wastewater directly enters the AAO biochemical system, it will cause a significant increase in the amount of aeration to the conventional AAO process, severe foaming, and large sludge loss. Therefore, it is necessary to strengthen the management of The pretreatment of this type of wastewater improves its biodegradability, removes high sulfate radicals, most of ammonia nitrogen and TP in the water, and then mixes it with low-concentration wastewater into biochemical treatment facilities. On the basis of giving full play to the advantages of anaerobic treatment, it saves investment. land area, operating costs and reduce the difficulty of subsequent aerobic biochemical process stage treatment, but so far no public reports

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