Sequencing batch reactor treatment of tannery wastewater for carbon and nitrogen removal

Abstract

The paper evaluates the organic carbon and nitrogen removal performance of the sequencing batch reactor (SBR), technology for tannery wastewater. For this purpose, a pilot-scale SBR was installed on site to treat the plain-sealed tannery effluent. The study involved wastewater characterization, start-up and operation of the reactor for carbon and nitrogen removal and model evaluation of system performance. Its removal efficiency was compared with that of the existing continuous-flow activated sludge system providing full treatment to wastewater from the Istanbul Tannery Organized Industrial District.

Model Based Optimization of Nitrogen Removal in a Full Scale Activated Sludge Plant

“…The average values of major pollutants in the influent were calculated as 2200 mg/L for total COD, 820 mg/L for suspended solids, 230 mg/L for TKN, 125 mg/L for ammonias nitrogen, 38 mg/L for trivalent chromium, 45 mg/L for sulfide, and 5200 mg/L for salinity. As expected, Table 1 Ϫ these values are consistent with previous observations on the same wastewater (Orhon et al, 1999a: Murat et al, 2002, 2006. Therefore, the model coefficients determined by means of calibration specifically define the influent quality and reflect the inhibitory nature of the wastewater.…”

“…The combined effluent of the district reflected all the features of a complex and strong wastewater with high organic carbon and nitrogen content with particulate matter, trivalent chromium, sulfide, high level of salinity and a wide range of toxic organics with inhibitory effects on biologic processes (Kabdasli et al,1993: Orhon et al, 1999a: Murat et al, 2002. Pretreatment to reduce the inhibitory and toxic effects usually involves segregation and separate chemical treatment of wastewater streams containing chromium and sulfide and then mixing with the general effluents.…”

COD fractionation and biodegradation kinetics of segregated domestic wastewater: black and grey water fractions

“…32 The same model was successfully used in a number of similar characterization studies. 33,34 The AQUASIM simulation program (Swiss Federal Institute for Environmental Science and Technology, Switzerland) was used in model evaluations. 35 The kinetic and stoichiometric parameters of the model were estimated according to the procedure proposed by Insel et al 13 using the SIMPLEX algorithm.…”

Carbon dioxide deliming in leather production: a literature review

“…Aerobic treatment is economical but needs big instruction space and long time for treatment due to low microbial activity and yield. This method is not effective for tannery wastewater due to high concentration load and the presence of inhibiting substance to bacteria (Murat et al, 2002) and shortage of carbon sources for denitrification. SHARON is presented as 25% of the oxygen and 40% of the carbon demand compared with nitrification and denitrification.…”