Advanced treatment and recycling method of silk reeling production wastewater

Abstract

The invention relates to an advanced treatment and recycling method for filature production wastewater. The method is characterized by comprising the following steps: (A) removing the floats, grease and suspended solids from the filature production wastewater by a first-level pretreatment unit consisting of a grid net and an oil separation sedimentation tank; (B) sequentially feeding the effluent of the oil separation sedimentation tank into a second-level biological treatment unit consisting of an anoxic tank, a plug-flow aeration tank and a secondary sedimentation tank to remove most of the organic pollutants; and (C) further treating the effluent after the second-level biological treatment by a third-level advanced treatment unit, wherein through advanced purifying treatment, the effluent quality meets the water quality requirement in filature production, the effluent is recycled to filature production, and thus the recycling of the filature production wastewater is realized. By adopting the advanced treatment and recycling method for filature production wastewater provided by the invention, the effluent quality is good; and the method has good adaptability and is stable and reliable in long-term running and simple to operate and manage so as to save the water resource, reduce pollutant discharge, protect environment and promote sustainable development of the filature industry.

Description

Technical field [0001] The invention relates to a method for advanced treatment and regeneration of wastewater, in particular to a method for advanced treatment and regeneration of reeling production wastewater, which is suitable for the advanced treatment and regeneration of medium and low-concentration organic wastewater. Background technique [0002] Silk reeling production consumes a lot of water, about 1,200 tons per ton of white silk produced. The wastewater discharged from silk reeling has the characteristics of large water volume and low concentration. It is easily degradable and biodegradable industrial wastewater. After advanced treatment, it is technically and economically feasible to be used as water for silk reeling. The advanced treatment and recycling of reeling wastewater has significant comprehensive benefits for saving water resources, reducing pollutant emissions and protecting the environment. At present, some silk reeling enterprises have invested in the con...

AI Technical Summary

Problems solved by technology

[0006] There are some deficiencies in the above literature: 1. In the process design, the removal of nitrogen and phosphorus is not considered enough or the measures taken are not reliable, and the results of treating effluent total nitrogen, ammonia nitrogen and total phosphorus are not ideal; 2. Some current reeling plants Silk enterprises use fresh cocoons for silk reeling seasonally, and the wastewater discharged when using fresh cocoons for silk reeling has a high concentration. The existing technology has insufficient adaptability to the treatment of wastewater discharged from fresh cocoon reeling, and the treatment effect is poor

3. The existing technology has poor long-term operation stability

Silk reeling production has high water quality requirements, and better water quality is the prerequisite for the production of high-quality products. There is still a lot of room for improvement in the water quality of the existing technology.

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