Complete-reclaiming process of down wastewater

Abstract

The invention discloses a complete-reclaiming process of down wastewater and a special feather fishing machine without driving force. A grit basin, a balance tank, a floatation tank, a biological contact oxidation tank, a secondary sedimentation tank, a clarifying basin, a no-value sand filter, a disinfection tank, a sludge thickening tank, a feather fishing machine without driving force specially used for reclaiming process, and the like are adopted to process wastewater. The complete-reclaiming process has low processing cost and good processing effect and realizes zero emission and down reclaiming.

Description

technical field [0001] The invention relates to a process for treating sewage, in particular to a process for treating eiderdown wastewater containing high-concentration organic matter and special equipment. Background technique [0002] For down washing, first pour clean water into the washing machine equipped with down, and at the same time add detergent and hydrogen peroxide for the first washing. After washing, drain the water, and then inject clean water again. 1 rough wash, 10 fine washes. Due to the addition of detergent and deodorant in the rough washing process, the pollution concentration of the discharged water is high, and the CODcr is as high as 1000-2500mg / L, which is a high-concentration organic wastewater, while the fine washing water has a large amount of water and a relatively low concentration, with a CODcr of 200 ~500mg / L. In order to save water resources, a considerable number of enterprises in my country's down industry currently use the method of treat...

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Problems solved by technology

[0003] According to the method of treating rough washing water and recovering fine washing water, although the amount of treated water is relatively reduced and the investment in civil construction facilities is relatively low, the disadvantages are: ① the pollution concentration of rough washing water is high, and the treatment difficulty increases; ② the B / C ratio of fine washing water It is relatively low and unfavorable for biochemical treatment; ③ even if part of the excess 50% of the fine washing water is used for greening or sanitary flushing water, a considerable part is discharged, which still causes certain water pollution and waste of water resources; ④ A large amount of water must be replenished every day for fine washing. For a large factory with a certain scale, thousands of tons of replenished water per day is also quite considerable; Impossible to unify, resulting in difficulties in management and increased investment in drainage pipelines

[0008] 3) The production season of the down industry is relatively strong, and the production season is obvious throughout the year. During the peak production season in summer, it is at full capacity. At this time, the treatment system must be able to withstand the impact of large water volume and high load; during the off-season production, the water volume decreases and the sludge load Decrease, the growth rate of microorganisms will slow down, which will lead to abnormal operation of biological systems;

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