Abstract:

This study focused on laboratory scaled and real scaled treatment plant performances andmicrobiological investigations for the optimum treatment of textile industry wastewater performedwith sequencing batch reactor (SBR). As a result of experimental studies of laboratory scaled SBRtreatment unit; optimum treatment efficiency was taken from 0.5 h filling-1.5 h reaction-1.5 hsettlement and 0.5 h discharge-idle periods. Average chemical oxygen demand (COD) removalefficiency of SBR of laboratory scaled textile industry was found as 75%, whereas average turbidityand color removal (at 586 nm, RES, m-1) efficiencies were 90% and 75%, respectively. Optimumreaction and settlement periods were used in a real scaled plant and plant efficiency was examinedfor parameters like COD, phenol, pH, mixed liquor suspended solids (MLSS) and sludge volumeindex (SVI). In this study, optimum reaction and settlement periods for treatment of textile industrywastewater were determined within a SBR in a laboratory scaled plant. These reaction andsettlement periods were verified with the measurement of COD, color and turbidity parameters.Floc structure and protozoa-metazoa species of activated sludge in SBR were also determined.Optimum reaction and settlement periods were used in a real scaled plant and plant efficiency wasexamined for COD, Phenol, pH, MLSS and SVI parameters. The corresponding values were foundas appropriate, acceptable and meaningful due to variance value of statistical analysis.Besides protozoa and metazoan of activated sludge in the laboratory scaled plant were investigated.Peranema sp., Epistylis sp., Didinium sp., Chilodonella sp., Opercularia sp., Vorticella sp. asprotozoa species and Habrotrocha sp., Philodina sp. as metazoa species were determined.83

Keywords: Laboratory/real scaled plant; protozoa; metazoa; SBR; textile wastewater treatment

Document Type:

DOI: http://dx.doi.org/10.2175/106143011X13233670703323

Appeared or available online: December 8, 2011

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