The inhibitory effects of lindane in batch and upflow anaerobic sludge blanket reactors

Bayramoğlu, Tuba Hande
Demirer, Göksel Niyazi
In this study, the inhibitory effects of lindane (LIN) on originally unacclimated mixed anaerobic cultures were investigated by anaerobic toxicity assay (ATA) experiments. ATA experiments revealed that 10 mg/l LIN exerted inhibitory effects on anaerobic cultures, which was recoverable. Continuous reactor experiments conducted to determine the inhibitory effects of LIN and the maximum LIN loading rate achievable in two-stage upflow anaerobic sludge blanket (UASB) reactors indicated that anaerobic granular cultures were successfully acclimated to 30 mg/l LIN. The maximum LIN loading rate and minimum hydraulic retention time (HRT) possible for the UASB system were 10 mg/l day and 18 h, respectively, which resulted in the overall chemical oxygen demand (COD) removal efficiency of 89%.


Impact of PCB-118 and transformer oil toxicity on anaerobic digestion of sludge: Anaerobic toxicity assay results
Kaya, Devrim; İmamoğlu, İpek; Sanin, Faika Dilek (Elsevier BV, 2013-08-01)
In this study, possible toxicity of increasing doses of PCB-118 and transformer oil (TO) on anaerobic sludge digestion was investigated. For this purpose, five different sets of reactors were prepared in which four different PCB-118 concentration (1, 10, 20, and 30 mg L-1) and three different TO concentration (0.38, 0.76, and 1.52 g L-1) were applied. Throughout the study, biogas production and composition, pH, TS, VS, and COD as well as PCB concentration were monitored. Toxicity was investigated by anaerob...
CABBAR, C; DOGU, G; Doğu, Timur; MCCOY, BJ; SMITH, JM (American Chemical Society (ACS), 1994-07-01)
The single-pellet moment technique was shown to be a powerful method for investigating the diffusion and adsorption of volatile hydrocarbons in the soil. The technique was used to evaluate effective diffusivities, adsorption equilibrium, and rate constants of chlorinated hydrocarbons (monochloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2-trichloroethane). Results obtained in a dry system showed that adsorption rate constants of all these hydrocarbons on the soil pellet used are of the same ...
The role of antiferromagnetic exchange interactions in dinuclear Cr(III) dithiocarbamates and a stepwise behavior of magnetic moment
AYTEKİN, ÖZLEM; Bayri, A. (Pleiades Publishing Ltd, 2012-12-01)
In this study the role of the antiferromagnetic interactions in recently synthesized dinuclear Cr(III) complex has been investigated. Since there was not enough structural information for the characterization of the synthesis, we claim that there should be antiferromagnetic interactions between the dinuclear Fe(III) ions, if the proposed structure is the real structure. A new experiment is proposed to test the predictions of this theoretical investigation.
Modification of a Conventional Anaerobic Digester for Improving the Effluent and Sludge Characteristics
Uludag-Demirer, S.; Demirer, Göksel Niyazi; Othman, M. (Wiley, 2009-12-01)
The aim of this study was to enrich the composition of anaerobic digester sludge in terms of nitrogen and phosphorus by struvite (MgNH4PO4) formation. Waste activated sludge was anaerobically digested in batch reactors under the conditions that the minimum stoichiometric requirement for struvite formation was satisfied in all reactors. For this purpose, different amounts of magnesium (Mg2+) and phosphate (PO43-) ions were added initially to the batch reactors. The results showed the effects of adding Mg2+ a...
Effects of bromide ion and natural organic matter fractions on the formation and speciation of chlorination by-products
Ates, Nuray; Yetiş, Ülkü; Kitis, Mehmet (American Society of Civil Engineers (ASCE), 2007-10-01)
The impacts of bromide concentration and natural organic matter (NOM) characteristics on the formation and speciation of disinfection by-products (DBPs) in chlorinated NOM fractions were investigated. A total of 20 bulk water NOM fractions with a wide range of specific ultraviolet (UV) absorbance (SUVA(254)) values were obtained from a source water employing XAD-8 or XAD-4 resin adsorption in completely mixed batch reactors. SUVA was not a good predictor of DBP [trihalomethanes (THMs), haloacetic acids (HAA...
Citation Formats
T. H. Bayramoğlu and G. N. Demirer, “The inhibitory effects of lindane in batch and upflow anaerobic sludge blanket reactors,” CHEMOSPHERE, pp. 165–169, 2003, Accessed: 00, 2020. [Online]. Available: