Printing and dyeing waste water treatment system and process with low yield of sludge

A technology for printing and dyeing wastewater and treatment process, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, chemical instruments and methods, etc., can solve the problems of low sludge yield and large amount of sludge, etc. Achieve the effect of low operating cost, quick effect, convenient operation and management

Inactive Publication Date: 2012-06-27
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortage of large amount of sludge generated in the existing printing and dyeing wastewater treatment process, and to provide a printing and dyeing wastewater treatment system and its process with low sludge yield

Method used

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  • Printing and dyeing waste water treatment system and process with low yield of sludge
  • Printing and dyeing waste water treatment system and process with low yield of sludge

Examples

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Effect test

Embodiment 1

[0021] The water quality of a printing and dyeing wastewater is pH: 10~13, CODcr: 800~1200mg / l, NH 3 -N: 15~30mg / l, TP: 2~6mg / l, water temperature is 35-40℃, water volume is 4000m 3 / d, the sewage treatment process is neutralization - anaerobic hydrolysis - biological selection pool - aerobic pool - SBR pool - effluent, and the effluent after treatment is required to meet the CJ3082-1999 tube standard of CODcr<500mg / l. The residence time in the anaerobic hydrolysis zone is 7 hours. A submersible mixer is set in the zone to mix the mud and water fully, and a combined filler is set to increase the biomass. The residence time of biological selection pond is 2h, the residence time of aerobic pond is 12h, and the residence time of SBR pond is 6h. Activated sludge method, blast aeration, can improve the oxygenation of the aeration tube, add metazoans in the aerobic zone to strengthen predation, under this condition, the effluent CODcr<200mg / l, the sludge reduction effect can reach ...

Embodiment 2

[0023] The wastewater in a park is mainly water-jet looms, the wastewater quality is pH5-7, CODcr:100-400mg / l, NH 3 -N:10-15mg / l, TP1-3mg / l, water temperature is normal temperature, water volume is 5000m 3 / d, the sewage treatment process is adjustment - air flotation - anaerobic hydrolysis - biological selection tank - aerobic tank - secondary settling tank - sand filter - effluent, and the effluent is required to meet the GB18918 Class B standard. The residence time in the anaerobic hydrolysis zone is 8 hours. A submersible mixer is set in the zone to mix the mud and water fully, and a combined filler is set to increase the biomass. The residence time of biological selection pond is 0.5h, and the residence time of aerobic pond is 12.5h. The activated sludge method is adopted, and the blower aeration can improve the oxygenation of the aeration tube, and the aerobic zone is added with metazoans to strengthen predation. Under this condition, the effluent is better than the GB18...

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Abstract

The invention discloses a printing and dyeing waste water treatment system and process with low yield of sludge. According to the invention, an intake pump, a valve, a flowmeter, an anaerobic hydrolysis zone, a biological selection zone and a biologically reinforced predation aerobic sludge reduction zone are successively connected; the anaerobic hydrolysis zone is provided with a diving mixer and a biological filling material carrier, the biological selection zone is provided with a diving mixer, an aeration device is provided at the bottom of the biological selection zone and the biologically reinforced predation aerobic sludge reduction zone, a metazoa culture adding groove is connected with the biologically reinforced predation aerobic sludge reduction zone, the upper part of the biologically reinforced predation aerobic sludge reduction zone is connected with the bottom of a secondary settling tank, the upper part of the secondary settling tank is provided with an outlet pipe, and sludge at the bottom of the secondary settling tank is connected with the bottom of the anaerobic hydrolysis zone and the biological selection zone through a settling zone sludge reflux pump and a sludge pipe. The printing and dyeing waste water treatment process with low yield of sludge in the invention is applicable to all the activated sludge processes and variant processes thereof and can be used for newly building a construction and reconstructing a built construction.

Description

technical field [0001] The invention relates to the technical fields of biological engineering and environmental engineering, in particular to a printing and dyeing wastewater treatment system with low sludge yield and a process thereof. Background technique [0002] The daily discharge of printing and dyeing wastewater in my country is (3~4)×10 6 t, is one of the major pollutant dischargers in various industries, accounting for about 35% of the total industrial wastewater discharge. Printing and dyeing wastewater is mainly composed of desizing wastewater, boiling wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater and printing wastewater. The four processes of printing and dyeing processing must discharge wastewater. The pretreatment stage (including desizing, scouring, bleaching, mercerizing and other processes) to discharge desizing wastewater, boiling wastewater, bleaching wastewater and mercerizing wastewater, dyeing wastewater is discharged fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 沈浙萍梅荣武李明智韦彦斐喻治平张刚王慧荣李欲如
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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