Typical industrial wastewater treatment methods outlined Phenolic wastewater

For industrial wastewater treatment characteristics, we believe that its treatment should be based on actual wastewater quality appropriate pretreatment methods, such as flocculation, electrolysis, electrolysis, adsorption, photocatalytic oxidation process, destroy refractory organics in wastewater, wastewater improvements biodegradability; further combined with biochemical molybdenum plating, such as SBR, contact with oxygen Industrial Arts, A / O process, etc., in-depth treatment of industrial wastewater.
Typical industrial wastewater treatment methods outlined
Phenolic wastewater
Mainly from the coking plant, gas, petrochemical plants, insulation material factory and other industrial sectors as well as petroleum cracking ethylene, synthetic phenol, polyamide fibers, synthetic dyes, organic pesticides and phenolic resin production process. Main phenolic wastewater containing phenolic compounds such as phenol, cresol, xylenol and nitro-p-cresol. Phenolic compound is a protoplasm poison, make protein coagulation. Concentration of phenol in water up to 0.1 a 0.2mg / L, the fish odor that is, can not eat; increased concentration of 1mg / L, may affect fish spawning, phenol 5-10mg / L, will be a lot of fish deaths. Phenol in drinking water can affect human health, even if the concentration of phenol in water only 0.002mg / L, with the stench of chlorine disinfection will produce PCP. Typically the concentration of 1000mg / L of phenol wastewater. Called high concentration wastewater, such waste shall be recovered phenol, and then processed. Mass concentration is less than 1000mg / L of wastewater, known as low density phenolic wastewater. Tungsten wire this type of waste recycled, the phenol concentration and recovery post-processing. Phenol recovery methods are solvent extraction, steam stripping, adsorption, closed loop method. Phenol concentration in the 300mg / L less water available biological oxidation, chemical oxidation, chemical oxidation methods such as physical discharged after treatment or recycling.
Mercury-containing waste
Mercury-containing waste water mainly from non-ferrous metal smelters, chemical plants, pesticide plants, paper mills, dye and thermal Instrument Factory and so on. Removal from wastewater methods of inorganic mercury sulfide precipitation, chemical coagulation, activated carbon adsorption cowardly, metal reduction, ion exchange method and microbiological method. Generally alkaline wastewater containing mercury commonly used chemical coagulation or sulfide precipitation method. Available acidic wastewater containing mercury metal reduction method. Low concentrations of mercury-containing waste water available activated carbon adsorption, chemical coagulation or activated sludge process, organic mercury waste are difficult to handle, usually the first organic mercury is oxidized to inorganic mercury, and then processed.