The ③ anaerobic hydrolysis acidification tank: according to the wastewater pollutants conditions, car mirror covers flags stay time T = 4 ~ 10h, the COD removal rate is generally 15% to 30% color removal up to 40% to 70%. Had a significant effect on the elimination of foam.
④ biological contact oxidation tank: biological contact oxidation is essentially a biofilm and activated sludge mixed type. Abroad also known as the submerged biofilter law. Placed a certain number in the pool and has a certain porosity and specific surface area of the filler, and provides a habitat for microbial growth, biofilm characteristics car mirror covers flags of the method. But it also uses the activated sludge aeration, and with a certain amount of activated sludge in the cell body and filler, so it has the characteristics of activated sludge. Because it uses diffused aeration type, Car Flags For Sale without the foam impact surface of the cell body does not produce sludge bulking, high organic loading, small footprint, biological contact oxidation process, the activated sludge aeration manner.
Biological contact oxidation pond residence time T = 5 to 7h, the COD removal rate of about 55% to 60% is generally about 50% color removal, gas and water than normal (20 to 2 5: 1. Biological contact oxidation tank is usually designed for Sec, Sec pool volume can be the same, the first paragraph than the second paragraph of pool capacity large. The first paragraph of the gas-water ratio (25 to 28): the second (15-18): 1.
The ⑤ activated sludge: the residence time of the activated sludge aeration tank is usually T = 9 ~ 12h, the COD removal rate of about 60% to 70% color removal of about 50%.
6 sedimentation tanks: the settling time is usually T = 1.5 ~ 2h. At present, the sedimentation tank vertical flow sedimentation tank type, the larger the amount of water, the use of radial flow sedimentation tank type. (Board) inclined tube sedimentation tank sludge sluggish and easy to plot the mud, sludge denitrification caused by the sludge float, the current has been rarely used in the dyeing wastewater. Sludge is usually gravity or mechanical sludge discharged into a concentrated pool, and then the mechanical dewatering of sludge drying. The beginning of the run of the anaerobic hydrolysis tank, in order to increase the pool of sludge content, also part of the settling tank sludge return. car mirror covers flags
⑦ coagulation and sedimentation, and coagulation and flotation tank: coagulation and sedimentation or coagulation and flotation process, the use of chemical dosing methods. Vote Drug mostly inorganic polymer aluminum or inorganic and organic polymers, the sludge is also discharged into the sludge thickener and biological sludge to be dealt with together. Its COD removal efficiency of about 40% to 55% color removal of about 40% to 60%. Custom Car Flags China Coagulation and sedimentation, or concrete flotation pool of pharmaceutical dosage hydraulic mixing or mechanical mixing. Slightly higher than the emission standards for sedimentation tank effluent after the aerobic biological treatment, or before the sedimentation tank to dosing, the use of hydraulic mixing.
The ⑧ chemical oxidation ponds: chemical car mirror covers flags oxidation to remove the chroma and the remaining organic pollutants mainly the decolorization better than Auto Racing Flags coagulation and sedimentation or flotation process, in which photochemical oxidation or electrochemical oxidation method has some high-tech The technical content has been applied in engineering.
When the wastewater pH is higher, should consider in the regulation of pool acid and measures. However, when the enterprise has three effect evaporator the mercerizing light alkali recovery device and strictly control the amount of alkali
in the production process, and dyeing wastewater pH of 9.0 to 9.5 or so, generally without consideration and installations.
Around the emission standards in the process, according to the requirements of the different treatment of different water quality conditions, and proposed a different emission site. Emissions in the sedimentation tank, after coagulation and sedimentation, emissions.