Systematic treatment project and effect of heavily polluted black and odorous ponds and pits
Taking a heavily polluted black and odorous pits and ponds located in Baoding,Hebei Province as the treatment object,the pit and pond received water are mainly from industrial pollution sources,the average concentrations of CODCr,BOD5,ammonia nitrogen,to-tal nitrogen,and chloride in the water are 1 700,594,225,331,and 5 550 mg/L,respectively.In order to renovate the pit and pond and restore its water body environment,the sewage from the pit and pond was extracted and treated using an integrated equipment of two-stage A/O+MBR+Fenton oxidation process.The sewage after treatment met the Class V standard in the Environmental Quality Stand-ards for Surface Water(GB 3898-2002).After the use of ectopic solidification/stabilization technology+soil barrier landfill technol-ogy for sediment treatment,the pollutants in the pit and pond sediment met the soil risk control values of Class Ⅱ in the Soil Environ-mental Quality,Construction Land Risk Control Standards for Soil Contamination(Trial)(GB 36600-2018).After the completion of pit and pond management,a water body maintenance system was established to help rebuild the ecosystem and strengthen the self-purifica-tion capacity of the water body.The heavily polluted pit and pond sewage and sediment treatment technology adopted in this project has the characteristics of high efficiency and stable operation.
black and odorous water bodysediment treatmentwater body maintenanceprocess reference
万方数据
维普
