Asli Coban

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...

Environmental Evaluation of Organohalogens and Removal Methods

Organohalogens are organic compounds that contain one or more halogen atoms (fluorine, chlorine, bromine or iodine). Having adverse effects on the environment and public health these compounds, which have been originated naturally and anthropogenically, have to be investigated carefully. In recent years, organohalogen accumulation by living organisms have been examined and removal alternatives have been studied due to their carcinogenic characteristics. There have been physicochemical and biological removal methods of organohalogens. Primarily source, type and concentration of these pollutants have been determined when any regional pollution has occurred. Afterwards an appropriate removal method of this pollutant has been selected. In this study, a general assessment of removal methods and accumulation of organohalogens has been made in terms of definition, formation and adverse effects of them. Keywords: Biological treatment, physicochemical treatment, organohalogens