Ballasted Flocculation Magnetic Technic On The Treatemnt Of Copper Ions Contained In The Copper Wash Wastewater

Water is all the material basis of life and survival.In recent years, with the city's modernization and the development of industrial production activities,a large number of domestic sewage and industrial wastewater are continuously discharged into lakes, rivers and soil.Especially the heavy metal waste water, not only seriously damage the ecological environment,but also enrichment in the animals and plants and threaten human health.Effective management of heavy metal waste water pollution has become one of the challenges facing our country.Nowadays,there are a variety of heavy metal wastewater treatment methods (such as chemical,physical chemistry,microbiological method, etc.). These methods are more widely in practical applications.In order to explore a more effective approach,in this paper,the Loading magnetic flocculation techni-cal for treatment of heavy metal in wastewater of copper ions were studied exp-erimentally, to provide technical reference about this technology applications of wastewater treatment works in future.Main contents of the study:experimental of static beaker PAC,ferric sulfate, fly ash on the removal of copper ion in washed copper wastewater impact factors and the most appropriate dosing conditions.And then select the best flocculant by technical and economic comparison.Optimal flocculant and magn-etic powder are combined,and study the optimum dosage of magnetic condition-s,followed by orthogonal experiment.According to the results of orthogonal test and the actual situation of Tongchang washing design process,finally estimate the project investment and cost analysis.Studies suggest that:(1)the best experimental conditions of PAC remove the copper wash wastewater containing copper ions:dosage is 60mg/L,Jing Shen time is 25min,pH is 8,the temperature has little effect which can be obtained at room temperature.(2)the best experimental conditions of PFS remove the copper wash wastewater containing copper ions:dosage is 100mg/L, Jing Shen time is 30min,pH is 8,the optimum temperature is 25℃.(3)the best experimental condi-tions of Fly Ash remove the copper wash wastewater containing copper ions:dosage is 15g/L, pH is 8, the reaction time is 2.5h,the optimum temperature is 30℃.(4)by the technical and economic comparison,PAC is the optimum coagulant.PAC and magnetic are combined,the best experimental conditions of magnetic powder:dosage of 500mg/L,Jing Shen time is 15min. (5) The optimal run by the orthogonal experimental conditions:powder dosage is 500mg/L, PAC dosage is 60mg/L, pH is 7.5, Jing Shen time is 10min. (6) the estimate of the nvestment of the design process,processing wastewater is 8000m3/d, the total investment is 4.6805 million yuan,its including:class I costs is 3.2329 million yuan; class II costs is 909,100 yuan;project preparation cost is 414,200 yuan;initial working capital is 12.43 Million. (7) Finally,the processing techn-ology cost analysis and the results are as follows:annual wastewater treatment the total cost is 1.036 million yuan, including fixed costs 293,500 yuan,the variable cost of 742,500 yuan,operating costs 858,600 yuan,the unit wastewater treatment cost 0.53 yuan.