A method and device for treating phosphorus-containing printing and dyeing wastewater

Abstract

The invention relates to a phosphorus-containing printing and dyeing wastewater treatment method and device. The device comprises a wastewater adjusting tank, a decoloration and dephosphorization tank, an anoxic and anaerobic reaction tank, a biochemical contact tank and a secondary sedimentation tank, wherein the decoloration and dephosphorization tank comprises a mixed stirring zone and a settling zone; the anoxic and anaerobic reaction tank comprises an aerobic section, an anoxic section and an anaerobic section which are partitioned through baffle plates; the biochemical contact tank is provided with a water inlet pipe, a water distribution triangular pyramid, filler and an aeration control system; the quantity and the quality of wastewater are adjusted through the adjusting tank, and the wastewater sequentially enters the decoloration and dephosphorization tank, the anoxic and anaerobic reaction tank and the biochemical contact tank for anoxic, anaerobic and aerobiotic reaction and is discharged up to the standard after settled.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method and device for treating phosphorus-containing printing and dyeing wastewater. Background technique [0002] The printing and dyeing industry is a large discharge of industrial wastewater. The printing and dyeing wastewater has the characteristics of high chroma, high salt content, complex components, poor biodegradability, and difficult decolorization. It is difficult to use conventional methods to treat it. At the same time, surfactants are used in the dyeing and finishing process As a result, the concentration of phosphorus in printing and dyeing wastewater is high, and phosphorus-containing printing and dyeing wastewater has become a difficult problem for industrial wastewater treatment. [0003] In the traditional printing and dyeing wastewater treatment process, chroma, BOD 5 , COD, SS, N-NH 3 These indicators of TN and TN can all meet the national in...

AI Technical Summary

Problems solved by technology

[0002] The printing and dyeing industry is a large discharge of industrial wastewater. The printing and dyeing wastewater has the characteristics of high chroma, high salt content, complex components, poor biodegradability, and difficult decolorization. It is difficult to use conventional methods to treat it. At the same time, surfactants are used in the dyeing and finishing process As a result, the concentration of phosphorus in printing and dyeing wastewater is high, and phosphorus-containing printing and dyeing wastewater has become a difficult problem for industrial wastewater treatment

[0003] In the traditional printing and dyeing wastewater treatment process, chroma, BOD 5 , COD, SS, N-NH 3 , TN and these indicators can all meet the national indicators, but the total phosphorus often fails to meet the discharge standards, so it is of great practical significance to explore the treatment technology of phosphorus-containing printing and dyeing wastewater

Images