Description
AC for Printing and Dyeing Wastewater
Printing and dyeing wastewater has complex composition, which not only has serious harm to the local ecology, but also leads to large-scale pollution, endangering human health, affecting the stability of the biological community. Since late 20th century, with the maturity and popularization of the technology, activated carbon has become one of the mainstream technologies in the printing and dyeing wastewater treatment.
Generating Scenes
desizing, dyeing, printing, post-treatment, etc.
Adsorptiontargets
Cr3+ ;Cd2+ ; Hg2+ ; suspension ;organic contaminants ; dye molecule
Application Scenes
deep wastewater treatment, emergency treatment, reuse water treatment, process optimization
Treatment Process
AC conventional adsorption, chemical modification/catalytic advanced treatment, advanced oxidation process (such as ozone-activated carbon combined), etc.
Clarkson activated carbon series
CKC-PD-TCLR-G, CKC-PD-CHTC-G
Case
dye wastewater decolorization and COD removal
Process design: coagulation and precipitation + activated carbon adsorption
Wastewater: high color (about 5000 Pt-Co), COD up to 2000 mg/L.
AC type: PAC, dosage 0.5-1.5 g/L.
Treatment effect
Color removal rate: more than 95% (color <100 Pt-Co after adsorption).
COD removal rate: 80%-90% (down to 200-400 mg/L).
Advantage: rapid adsorption of organic matter hard to degrade, making up for the shortcomings of biochemical treatment.
AC for Printing and Dyeing Waste Gas
Printing and dyeing enterprises produce a large number of waste gas in the production.If not being properly handled to meet the discharge standards, it will have a greater impact on the environment, but also affect the health of the surrounding residents.
Generating Scene
drying, shaping, printing and other processes
Adsorption Targets
CH3CH2COCH3, CH3COCH3, H2S, RSH, PhCH3, DMAC, CH2Cl2, VOCs, ClCH2CH2Cl
Application Scenes
drying exhaust gas treatment, sizing machine exhaust gas purification, workshop air purification.
Treatment Process
AC multi-stage adsorption, solvent recovery, adsorption desorption + catalytic combustion, chemical modification / catalytic advanced treatment, etc.
Clarkson activated carbon series
CKC-PD-TCLR-L, CKC-PD-CHTC-L
Case
DMF & PhMerecovery process of a textile coating enterprise
Output: about 200,000m/t, DMF dosage: 500kg/d, PhMe: 2400kg/d.
Process flow:
water spray absorption AC adsorption desorption condensation recovery
Treatment effect:
Removal rate: > 98%, meet the requirements of the DMF and PhMe emission standards.
Economic benefits: 2.38t of DMF aqueous solution and 2.28t of toluene can be recovered every day, saving cost of RMB10,000 per day.
Scanning electron microscope diagram of the structure of activated carbon specialized in adsorbing DMF and PhMe.
