Study On The Treatment Of Dyeing Wastewater By Powder Carbon To SBR

Dyeing and finishing wastewater is an important part of industry wastewater in our country,which characterized by high lever of alkali,colour,organics,poor biodegradability and it is difficult to deal. This paper researches in the feasibility of treatment of dyeing wastewater by addition of powdered activated carbon to SBR.Doing static adsorption experiments determines the amount of activated carbon. Research on different dyeing wastewater degradation performance, analysis of the impact of puting activated carbon into activated sludge in SBR (PAC-SBR) to the organic microbial degradation kinetics parameters and the aerobic respiration curve.1) In the activated carbon static adsorption experiments , disperse red dye is used, CODCr concentration was 500.94 mg / L, absorbency was 0.198, the color is 200 times , and the adsorption time was 8 h. Take into account the cost of activated carbon, static adsorption test results, as well as the degradation of performance tests , determine that the best activated carbon dosage is 400 mg / L, respectively.2) The degradability under aerobic condition in SBR shows that reactive red is hard-biodegradable, disperse blue is readily biodegradable and dispersed red is biodegradable. The organic and color removal of the three dyes in powder carbon reinforced SBR is high than SBR. Adding activated carbon to SBR system can promote the degradation of organic matter and color.3) In SBR process and activated carbon strengthened SBR process, when the ratio of disperse red wastewater is increased from 30% to 40%, further increased to 60%, the color removal was improved at different degrees.When treat disperse blue wastewater in SBR process the ratio of disperse blue wastewater is increased from 30% to 40%, further increased to 60% and 80%, the color removal was continuously improved,reached 95%. In PAC-SBR process, the ratio of dyeing wastewater is is increased from 30% to 40%,, the color removal reached 95%, then increased the ratio of dye wastewater to 100%,the color removal was stable at more than 95%. The treatment effect is good.4) By the oxygen uptake rate method, the results show that: disperse blue dye is not easily degradated,disperse red dye is hard to degrade .And the degradationof reactive red is the worst, the reactive red dye almost can not be degradated.5)The activated aludge performance test shows that: when activated carbon and sludge floc integrate,the floc density increase ,the sludge is easily compressed.And because of the porous activated carbon, floc is fully integrated with the carbon .So it can enhance sludge. Therefore, in PAC-SBR system, the sludge precipitation is better than that in SBR system.6) Test results of degradation dynamics in substrate degradation process of the SBR and PAC-SBR show that the saturation constant Ks of is higher than that of SBR process. Namely, in the same conditions, PAC-SBR process remove the same amount of COD as in SBR system need little time,the addition of PAC to SBR can improve the organic removal rate of microbial. In the long-term treatment of dye wastewater reactor, the dye leads the activity of sludge lower. The Vmax values of dye wastewater treatment reactor are less than the value of domestic wastewater treatment reactor. By adding activated carbon to SBR reactor can prevent the microorganism activity playing down .So the Vmax value in the activated carbon strengthened SBR process is higher than SBR process.