Research On Carbon-Sludge System Circle Adsorption Bio-degradation Technology

In recent years,with the aggravation of water pollution,the types and quantities of organic pollutants in water are increasing.Eutrophication is becoming more and more serious.The traditional water treatment technology can not guarantee the quality of effluent water.Recently,the content of organic matter in Gao Mi Sunvim Water Plant of raw water has been increasing,so it is necessary to improve the existing process to ensure the water quality.The paper mainly researches the effect of Carbon-Sludge system Circle Adsorption Bio-degradation technology(CSCAB)on the raw water treatment.The start-up,commissioning and operation of biochemical pool in the system were studied.The treatment effect of the system on CODcr,UV254,ammonia nitrogen and algae index was investigated.We summarized the effects of temperature,organic matter concentration,pH,HRT,and activated carbon-sludge concentration on the treatment efficiency.CSCAB including biological-regeneration pool and the adsorption pool,coagulation sedimentation pool and reflux system.It uses carbon-sludge biological adsorption degradation characteristics and biological sludge coagulation flocculation to improve water quality.The optimal volume ratio of biological carbon-sludge was 3%.After normal operation of the biological regeneration pool,the removal rate of CODcr,ammonia nitrogen and UV254 reached53.09%,33.74% and 28.66% respectively;the green algae,blue-green algae,diatoms and cryptophyta removal rate reached to 32.19%,51.89%,50.94%,38.89% respectively.The biological activated carbon sludge firstly enters into the adsorption pool for adsorption and degradation,and then into the coagulation sedimentation pool for carbon-sludge enhanced coagulation.The removal rates of raw water's CODcr,UV254,ammonia nitrogen,algae cells and turbidity were 53.99%,44.05%,58.63%,40.14%,56.11%,respectively.After treatment,the total number of CODcr,UV254,ammonia nitrogen,algae cells and turbidity were 6.83mg/L,0.10 cm-1,0.13mg/L,10331cell/ml,1.58 NTU.The factors that affect the treatment effect of Carbon-Sludge system are temperature,organic matter concentration,pH,HRT,activated carbon-sludge concentration and so on.The water temperature change has a great influence on the treatment effect.With the increasing of temperature,the removal rate of organic algae was increased,and the removal efficiency of CODcr,ammonia nitrogen and UV254 reached the maximum when the temperature reached28.4?.In winter,using heating method for reflux system increases the efficiency of the system,and the energy consumption is low.With the increasing of raw water's organic matter concentration,the adsorption and degradation rate of biological activated carbon-sludge also increased,and when CODcr concentration was 25.74mg/L,the removal rate of CODcr and algae was 67.4% and 49.4%.pH has a great influence on the system.The acid is larger(<6.5)of the effluent CODcr,algae at a high concentration.When pH is 6.5~8.0,CODcr and algae content is low.When the pH rises to 8.5,the effluent CODcr concentration increased,while the algal cells content decreased.Through the reasearch on the effect of different HRT of biological regeneration pool,the best HRT was 10 h.Activated carbon-sludge strength increased with the operation of the system,the experimental results show that the concentration of carbon-sludge in 3500~4500mg/L treatment effect is better.By reducing the concentration of carbon-sludge by proper carbon-sludge efflux and adjust the reflux system when the sludge concentration is too high,so that the system can achieve the best treatment effect.