Treatment method and equipment for up-to-standard discharging of vitamin fermentation pharmaceutical wastewater

Abstract

The invention provides a treatment method and equipment for up-to-standard discharging of vitamin fermentation pharmaceutical wastewater. The treatment method includes: enabling the wastewater to sequentially pass a pretreatment unit, an anaerobic treatment unit using an IC reactor as a core, a two-stage short-cut nitrification denitrification and postpositive denitrification combined process (hereinafter referred to as a D / N / D unit) and a in-depth treatment unit adopting catalytic ozonation as a core to remove organic matter, ammonia nitrogen, total nitrogen, suspended matter and chromaticity step by step so as to reach discharging standards. The treatment method has the advantages that compared with conventional denitrification processes, oxygen consumption and alkaline adjusting agent consumption can be saved by 25% and 40% at least through multi-stage short-cut nitrification denitrification, so that infrastructure and operation cost is lowered greatly; postpositive denitrification is adopted, so that total nitrogen is ensured to be up to standards; an MBR (membrane biological reactor) is adopted to replace a secondary sedimentation tank, so that bioretention performance and stability of a system are improved greatly; the new process of catalytic ozonation which is free of agent addition and secondary pollution is adopted as the in-depth treatment unit, so that removing and decoloring effect of degradation resistant COD is excellent and the treatment method is economical and efficient.

Description

technical field [0001] The invention relates to a treatment method and equipment for discharging wastewater up to standard, in particular to a method and equipment for treating vitamin-based fermentation pharmaceutical wastewater up to standard. Background technique [0002] As we all know, pharmaceutical industry wastewater has complex components, high pollutant content, high biological toxicity, and high cost of treatment. It is a problem that needs to be solved urgently in the field of environmental protection at home and abroad. Fermentation engineering is an important pharmaceutical process. The main products are antibiotics, vitamins and amino acids, among which the output of vitamins accounts for about 70% of the total output of fermented drugs. Vitamin production wastewater mainly comes from process water, production flushing and kettle residue, which is acidic, has a heavy odor and color, and the main pollutants are high-concentration organic matter (according to HJ...

AI Technical Summary

Problems solved by technology

The main problems in this process section are: (1) After the anaerobic reaction, the ammonia nitrogen content may increase (polymer ammonification), while the organic matter content and carbon-nitrogen ratio decrease rapidly, which may not be able to meet the denitrification demand. A large number of external carbon sources are added; (2) In order to make the treatment of high-concentration ammonia nitrogen meet the standard, it is necessary to greatly increase the oxygen consumption of the nitrification section and increase the process section. The system is complex and the cost remains high, which cannot be afforded by the enterprise

The Feton method and the micro-electrolysis method have a high removal rate of organic matter and a good decolorization effect, but the cost of the agent is high, the labor intensity is high, the equipment corrodes quickly, and secondary pollution such as a large amount of iron sludge is produced, which is difficult and expensive to deal with.

Images