-
Industrial wastewater pretreatment: reducing pollutant load and protecting subsequent processes
- target, aim at, address, focus on, in response toHigh COD (Chemical Oxygen Demand) wastewaterFor example, in chemical, pharmaceutical, and coking wastewater, mesoporous structures can efficiently adsorb organic pollutants such as phenols, benzene derivatives, and heterocyclic compounds in the wastewater, reducing COD from thousands of mg/L to hundreds of mg/L, reducing the load of subsequent biochemical treatments (such as activated sludge process), and avoiding microbial poisoning.
- target, aim at, address, focus on, in response toDecolorization of printing and dyeing wastewaterThe adsorption rate of macromolecular dyes such as reactive dyes and dispersed dyes can reach 80% -95%, especially suitable for treating "dark high concentration printing and dyeing wastewater" (such as black and red dye wastewater). First, coal based activated carbon is used for adsorption decolorization, and then it enters the subsequent deep treatment, greatly improving the final effluent compliance rate.
- target, aim at, address, focus on, in response toOil removal from oily wastewaterIt has good adsorption capacity for emulsified oil and dissolved oil in water bodies, and is commonly used in the pretreatment of mechanical processing and petrochemical wastewater. It reduces the oil content from tens of mg/L to below 5mg/L, avoiding oil and fat from adhering to the surface of subsequent filter membranes and fillers, which affects treatment efficiency.
-
Advanced treatment of municipal sewage: improving effluent quality and assisting in the reuse of reclaimed water
- After the "secondary treatment (biochemical)" of municipal sewage plants, adding coal based activated carbon can further adsorb residual trace organic matter (such as humic acid, surfactants), color substances, and odor substances, reducing the COD of the effluent to below 50mg/L and the turbidity to below 1NTU, meeting the water quality requirements of "reclaimed water reuse" (such as green irrigation, road cleaning), and reducing the cost by 40% -60% compared to directly using coconut shell activated carbon.
-
Auxiliary treatment of wastewater containing heavy metals: targeted removal of specific ions
- Although its adsorption capacity for small molecule heavy metals (such as Pb ² ⁺, Hg ² ⁺) is weaker than that of coconut shell activated carbon, after surface modification (such as treatment with sulfuric acid or nitric acid to increase surface carboxyl and hydroxyl groups), it canCr ⁶⁺, As ³ ⁺ The adsorption capacity of heavy metal ions can be increased by 30% -50%, and it is commonly used for "auxiliary purification" of metallurgical and electroplating wastewater (such as further reducing the residual amount of heavy metals below the emission standard after chemical precipitation).
