Study On Remediation Of Polluted Water By Simulated River Reactor

The rapidly development of Longgang District of Shenzhen led to the seriouspolluted of Longgang River, water quality was inferior grade V, the main pollutantsNH₃-N、TP and BOD₅were exceeded of the standard. The overall image anddevelopment of Shenzhen was affected seriously by the black-odorous river，thetreatment for polluted river was an urgent problem to delay.According to the quality of Longgang River, and setting the simulated riverreactor to study the remediation technology of Longgang River. Using combinedprocess to remediate polluted water was the development and research focus of waterremediation in current domestic and international. The idea of remediation was usingsimulated river reactor with aeration in the aeration tank, according to the extent ofwater purification setting artificial streaming to form a certain depth of water andextend the hydraulic retention time, and then adding efficient microbial colony toform an enhancing biological area, using combined process to treat the polluted waterintegrately.When it was self-purification, the removal of COD、TP、NH₃-N、TN were7.44%、4.88%、5.70%and10.60%, and then up to33.96%、17.29%、20.73%and25.43%under the combined process. Consumption coefficient K1and thedegradation of BOD₅showed upward trend overall with raising air to water ratio.The consumption coefficient K₁was1:1with the best air to water ratio which canuse as the oxygen consumption reference of the Longgang River. The degradationcoefficient of COD、TP、NH₃-N、TN were0.34、0.23、0.26、0.59up to1.81、1.04、1.01、1.28under the combined process, which can use as the pollutant degradationcoefficient reference.The experiment showed that the combined process with aeration+artificialstreaming+adding-microbial technology, could make up for the lack of individualtechnology, increase the effect of remediation of polluted water and the overalleconomic. The study provides theoretic basis for combined process used in the polluted water remediation, to obtain the large number of basic experimental data andrelated parameters as fundamental reference for the river remediation.