Design of oxidation ditch in-situ upgrading and expansion project of a sewage treatment plant
The scale of a sewage treatment plant in Guangdon province was expanded from 6 × 104 m3/d to 10 × 104 m3/d,the effluent standard has been upgraded from the level B grade 1 in GB 18918-2002 Discharge standard of pollutants for municipal wastewater treatment plant to the quasi-V class discharge standards of sur-face water.The upgrading and expansion project will not affect the normal operation of the sewage treatment plant.Limited by the site,HPB technology was used to strengthen the existing micro-aeration oxidation ditch,re-alize the in-situ upgrading and expansion of the biological system,and advanced treatment process of magnetic coagulation sedimentation tank-denitrification deep bed filter was built.The renovation without water suspension was realized after optimizing the construction time sequence of the biochemical system.After the reconstruction,the oxidation ditch run stably,the mass concentrations of COD,NH3-N and TN in the effluent water of the oxi-dation ditch were not above 21.86,0.5,and 9.82 mg/L respectively,which showed that the effluent water quality stably met the designed discharge standard.
High concentration powder carrier bio-fluidized bed technology(HPB technology)in-situ upgrading and expansionoxidation ditch reconstructionrenovation without water suspension
万方数据
维普
