Treatment method of denim printing and dyeing wastewater
A treatment method and technology for printing and dyeing wastewater, which are applied in the field of denim printing and dyeing wastewater treatment, can solve the problems of ineffective treatment of harmful substances and general printing and dyeing wastewater treatment effect, and achieve the reduction of COD value and chromaticity, simple operation and economical cost. low effect
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Embodiment 1
[0038] Polish the iron electrode with 60-mesh sandpaper until the surface is smooth, rinse it with deionized water, and then polish it with 200-mesh sandpaper until the surface is bright. After rinsing and drying, soak it in 20% sodium hydroxide solution for 20 minutes. After rinsing Then soak in dilute hydrochloric acid for 3 minutes, rinse quickly after taking it out, dry the water with filter paper, and immerse it in absolute ethanol for later use. The denim printing and dyeing wastewater with a pH value of 6 was passed into an electrocoagulation device consisting of an electrolytic cell, an iron anode, and an iron cathode, connected to a DC power supply, and treated at an electrode voltage of 10V for 10 minutes to obtain primary treatment wastewater. The primary treatment wastewater is passed into the bioreactor composed of plexiglass column and perforated air distribution plate. : 0.1: 0.1: 0.1 Activated carbon fiber, white rot fungus laccase, polyphenol oxidase and cellu...
Embodiment 2
[0040] Polish the iron electrode with 100-mesh sandpaper until the surface is smooth, rinse it with deionized water, and then polish it with 300-mesh sandpaper until the surface is bright. After rinsing and drying, soak it in 60% sodium hydroxide solution for 40 minutes. After rinsing Then soak in dilute hydrochloric acid for 10 minutes, rinse quickly after taking it out, dry the water with filter paper, and immerse it in absolute ethanol for later use. The denim printing and dyeing wastewater with a pH value of 9 was passed into an electroflocculation device composed of an electrolytic cell, an iron anode, and an iron cathode, connected to a DC power supply, and treated at an electrode voltage of 25V for 70 minutes to obtain primary treatment wastewater. The primary treatment wastewater is passed into the bioreactor composed of plexiglass column and perforated air distribution plate. : 20:20:20 activated carbon fiber, white rot fungus laccase, polyphenol oxidase and cellulase...
Embodiment 3
[0042] Polish the iron electrode with 80-mesh sandpaper until the surface is smooth, rinse it with deionized water, and then polish it with 250-mesh sandpaper until the surface is bright. After rinsing and drying, soak it in 40% sodium hydroxide solution for 30 minutes. After rinsing, Then soak in dilute hydrochloric acid for 6 minutes, rinse quickly after taking it out, dry the water with filter paper, and immerse it in absolute ethanol for later use. The denim printing and dyeing wastewater with a pH value of 8 was passed into an electrocoagulation device consisting of an electrolytic cell, an iron anode, and an iron cathode, connected to a DC power supply, and treated at an electrode voltage of 18V for 40 minutes to obtain primary treatment wastewater. The primary treatment wastewater is passed into the bioreactor composed of plexiglass column and perforated air distribution plate. : 10:10:10 activated carbon fiber, white rot fungus laccase, polyphenol oxidase and cellulase...
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