Exemption Limit Value of Electroplating Sludge in Landfill: Case Study in Chongqing

The method of calculation of the exemption limit value of the hazardous waste in the landfill was introduced. The electroplating sludge generated by 15 electroplating enterprises in Chongqing was taken as study case to introduce how to calculate the exemption limit value of electroplating sludge in the municipal solid waste (MSW) landfill. The results showed that in back-stepping calculation scenario which was established on the statistical values of environmental parameters of the MSW landfill site in Chongqing, the pollutants concentration at the exposure point and release point were 0.005 5 mg/L (carcinogenic effects), 1.2 mg/L (non-carcinogenic effects) and 0.003 4 mg/L (carcinogenic effects), 0.76 mg/L (non-carcinogenic effects), respectively. The electroplating sludge exemption limit value in MSW landfill was 2.992 t/a, i.e. the electroplating sludge less than 3 tons within one year could be disposed in this landfill site.