Eyup Debik

Use of the Static Granular Bed Reactor (SGBR) with anaerobic sludge to treat poultry slaughterhouse wastewater and kinetic modeling.

Poultry slaughterhouses discharge very high amount of wastewaters and these wastewaters can be treated successfully at a very low cost using anaerobic treatment. In this study, the Static Granular Bed Reactor (SGBR), a newly developed anaerobic process which is fully anaerobic granule, and another Static Granular Bed Reactor containing both anaerobic granular biomass and non-granular biomass were employed for the treatment of poultry slaughterhouse wastewater. The objective of the use of two reactors having different types of anaerobic biomass is to evaluate whether anaerobic sludge could be used effectively instead of anaerobic granule, which is much more difficult to obtain than the other during the start up period. Average COD removal efficiencies were greater than 95% for both of the reactors. Furthermore, Grau second-order and modified Stover-Kincannon models were successfully used to develop a kinetic model of the experimental data with a high correlation coefficient (R(2)>0.95).

Antibiotic Fermentation Broth Treatment by a pilot upflow anaerobic sludge bed reactor and kinetic modeling

In this study, an upflow anaerobic sludge blanket (UASB) mesophilic reactor was used to remove antibiotic fermentation broth wastewater. The hydraulic retention time was held constant at 13.3 days. The volumetric organic loading value increased from 0.33 to 7.43 kg(COD)m(-3)d(-1) using antibiotic fermentation broth wastewater gradually diluted with various ratios of domestic wastewater. A COD removal efficiency of 95.7% was obtained with a maximum yield of 3,700 L d(-1) methane gas production. The results of the study were interpreted using the modified Stover-Kincannon, first-order, substrate mass balance and Van der Meer and Heertjes kinetic models. The obtained kinetic coefficients showed that antibiotic fermentation broth wastewater can be successfully treated using a UASB reactor while taking COD removal and methane production into account.

Optimization of energy costs in the pretreatment of olive mill wastewaters by electrocoagulation

In this study, the electrocoagulation process was evaluated as a pretreatment process for olive mill wastewaters. Aluminium (Al) and iron (Fe) electrodes, several contact times and 0.5, 1 and 2 A currents were used to compare chemical oxygen demand (COD) removal efficiencies for each case. The optimum contact time and current were 45 minutes and 1 A, respectively, which resulted in a COD removal of 58.7% with an Al electrode. Experimental data from distinct operational conditions were used to fit a model for COD removal efficiencies. Energy consumption was also predicted. Under optimum operational conditions, the treatment cost was approximately €0.13 kg−1 CODremoved and €4.41 m−3. The results showed that the electrocoagulation process was a cost-effective method for the pretreatment of olive mill wastewaters.

Treatment of poultry slaughterhouse wastewater using a membrane process, water reuse, and economic analysis

AbstractPoultry slaughterhouse wastewater, which represents one of the most important pollutants in Turkey, is generally treated with conventional biological processes in Turkey and around the world. In this study, poultry slaughterhouse wastewater was treated using laboratory-scale membrane processes, which were substituted for conventional processes. The performances of the membrane processes were investigated in terms of chemical oxygen demand (COD), conductivity, and membrane fluxes. Economic analyses were conducted for several membrane system alternatives. In addition, the alternatives were compared with each other and with conventional economic analysis of the data obtained in this study and data from several previous studies. The membranes used for the membrane processes were AG for reverse osmosis (RO), DK for nanofiltration (NF), and ER for ultrafiltration (UF). The highest COD removal efficiencies were 90% for NF and 97.4% for RO, and the conductivities decreased by 51.7% for NF and 96.6% for RO...

Disinfection By-Products Removal by Nanoparticles Sintered in Zeolite

Ab stract—Disinfection process by chlorine has been applying effectively in drinking water treatment processes; nevertheless it causes the formation of THMs which are thought to be carcinogen. Restrictions of THMs had been imposed by organizations in most of the countries. In Istanbul, these limit values were not exceeded in present time, but organic content of drinking water supplies is accreted by the increment pollution on occasion of population growth. This will lead to investigate and apply an extra treatment unit for THM removals. In this study, application of nanoparticle was researched in THM removal from tap water. Nanoparticle used in the process was sintered into zeolite in coin form. The results were promising. It was observed that unsintered form was more effective on removal of THMs than sintered form of α-Fe2O3. Fu rthermore, nan oparticles in zeolite form advanced the adsorption capacity of z eolite.

The evaluation of fouling effects in membrane process dealing with the biologically pre-treated textile effluents

Abstract Wastewater reuse is necessary in the textile industry due to its consumption of large amounts of freshwater. However, the main problem with the membranes is the decline of permeate flux due to the accumulation of organic and inorganic molecules on the membrane surface when the raw wastewater is used. This study focused on the fouling effect of aerobically and anaerobically pre-treated textile industry effluents using ultrafiltration (UC010) and nanofiltration (NP010 and NP030) membrane processes. Ultrafiltration (UF) and nanofiltration (NF) membranes were applied sequestered (UF or NF) and combined (UF + NF) to treat effluents from a full-scale aerobic sequencing batch reactor (SBR), which is present in the factory, and a laboratory-scale anaerobic treatment plant, namely the static granular bed reactor (SGBR). Membrane experiments at 10 bar operating pressure were carried out on the laboratory scale to obtain better results. Initial fluxes with NP010 seriously declined after 24 h during the long...