Aerobic biological treatment of opium alkaloid wastewater-effect of gamma radiation and fenton's oxidation as pretreatment

Bural, Cavit Burak
In this study, aerobic biological treatment of opium alkaloid wastewater and the effect of gamma preirradiation and fenton’s oxidation were investigated. First, the biodegradability of alkaloid wastewater was investigated by batch reactors and wastewater was found to be highly biodegradable providing 83 90 % COD degradation. In order to evaluate the effect of irradiation, original wastewater and irradiated wastewaters (40 & 140 kGy) were compared by means of BOD5/COD values and through aerobic batch experiments. Results indicated that irradiation imparted no further enhancement in biodegradability. Sequencing batch reactor (SBR) studies revealed that the treatment operation was not possible due to sludge settleability problem observed beyond an influent COD value of 2 g/L. Possible reasons for problem were investigated, and the high molecular weight, larger size and aromatic structure of the organic matters present in wastewater was thought to contribute to poor settleability characteristics. Some operational modifications including phosphate buffer addition cured the settleability problem. Influent COD was then increased to 5,000 mg/L. Significant COD removal efficiencies (> 70 %) were obtained in SBRs fed with both original and irradiated wastewaters. Preirradiated wastewater provided a better settling sludge in comparison to original wastewater. Degradation of the complex structure was followed by GC/MS analyses, particle size measurements and enhancement in filterability. Pre-irradiation enhanced the filterability of wastewater more than Fenton’s treatment and degradation by irradiation was proved by GC/MS analyses.


Anaerobic treatment of opium alkaloid wastewater and effect of gamma-rays on anaerobic treatment
Özdemir, Recep Tuğrul; Dilek, Filiz Bengü; Department of Environmental Engineering (2006)
In this study, anaerobic treatability of opium alkaloid wastewater and the effect of radiation pretreatment (gamma-rays) on anaerobic treatability were investigated. Biochemical Methane Potential (BMP) assay was performed with alkaloid wastewater having initial COD values of 2400, 6000 and 9600 mg/L with and without basal medium (BM). The highest anaerobic treatment efficiency of 77% was obtained in the BMP reactor containing alkaloid wastewater with initial COD of 9600 mg/L and BM. Co-substrate use was inv...
Aerobic Bacterial Degraders With Their Relative Pathways for Efficient Removal of Individual BTEX Compounds
Yavas, Alper; İçgen, Bülent (Wiley, 2018-11-01)
Benzene, toluene, ethylbenzene, and xylene (BTEX) compounds are of great environmental concern due to their toxicity and carcinogenicity. Bacterial removal of BTEX has proven to be highly efficient, cost-effective, and nondisruptive, provided that, efficient bacterial degraders are available. The objective of this study, therefore, is to discover aerobic bacterial degraders with their relative pathways that could be employed for the efficient removal of individual BTEX compounds. A total of 22 petroleum hyd...
Anaerobic treatment of synthetic textile wastewater containing a reactive azo dye
Sen, S; Demirer, Göksel Niyazi (American Society of Civil Engineers (ASCE), 2003-07-01)
In this study, anaerobic treatment of synthetic textile wastewater containing a reactive azo dye, namely, Remazol Brilliant Violet 5R, was investigated. A fluidized bed reactor (FBR) was used in the study. Before the operation period, start-up of the FBR was completed in 128 days with an immobilized microorganism level of 0.069 g volatile suspended solids per g support material (pumice). Anaerobic treatment of synthetic textile wastewater revealed that 300 mg/L dye was removed in the FBR system. Chemical ox...
Disinfection by-products formation in low - bromide and low - suva waters
Ateş, Nuray; Yetiş, Ülkü; Department of Environmental Engineering (2008)
The main objective of this study was to conduct a systematic investigation of the disinfection by-products (DBPs) formation in low-bromide and low- specific ultraviolet absorbance (SUVA) waters and the control of DBP precursors by nanofiltration (NF) and ultrafiltration (UF) processes in such waters. To this end, firstly, the effect of bromide ion on the formation and speciation of DBPs was investigated. In fractionated Alibeyköy source water, increasing bromide concentrations in NOM fractions increased con...
Anaerobic co-digestion of sewage sludge and primary clarifier skimmings for increased biogas production
Alanya, S.; Yılmazel Tokel, Yasemin Dilşad; Park, C.; Willis, J. L.; Keaney, J.; Kohl, P. M.; Hunt, J. A.; Duran, M. (IWA Publishing, 2013-01-01)
The objective of the study was to identify the impact of co-digesting clarifier skimmings on the overall methane generation from the treatment plant and additional energy value of the increased methane production. Biogas production from co-digesting clarifier skimmings and sewage sludge in pilot-scale fed-batch mesophilic anaerobic digesters has been evaluated. The digester was fed with increasing quantities of clarifier skimmings loads: 1.5, 2.6, 3.5 and 7.0 g COD equivalent/(L.d) (COD: chemical oxygen dem...
Citation Formats
C. B. Bural, “Aerobic biological treatment of opium alkaloid wastewater-effect of gamma radiation and fenton’s oxidation as pretreatment,” M.S. - Master of Science, Middle East Technical University, 2008.