:: Journal of International Environmental Application & Science ::

Year 2006, Volume I (Issue I-II)

Journal of International Environmental Application and Science , Vol. 1, No. 3 (2006), 41-53


Removal of tetrachloroethylene (PCE) in up flow anaerobic sludge blanket reactors (UASB)

Celalettin ÖZDEMİR1, Nejdet ŞEN2

1Selcuk University Environmental Eng. Dept. Konya-TURKEY
2Selçuk University, Department of Chemistry, 42031, Konya-Turkey


Abstract: Low concentration of chlorinated aliphatic compounds may be found in wastewater and contaminated soils from different industrial sources and in the air arisen from these sources. Low levels of Volatile Organic Compounds (VOC)’s could be removed by adsorption, incineration and biofiltration methods. These methods have some disadvantages with low removal efficiency or high operation cost. Chlorine has been removed from the chlorinated aliphatic compounds by anaerobic conditions. The aim of this research was investigation of biological treatment of VOC’s in high flow speed reactors. Resistance capacity of micro-organisms was investigated in an upflow anaerobic sludge blanket reactors (UASB) designed automate control system by feeding with addition co-substrate, by loading different ratio of organic matter, hydraulic retention time (HRT), at stable condition of COD, Volatile Faty Acids (VFA), pH, alkalinity, temperature (35Co) etc. during the anaerobic treatment. Glucose, sodium sulphate, calcium chloride, ammonium bicarbonate, potassium phosphate and methanol were used as the co-substrates. In this studies the removal of PCE was approximately 97,5 % respectively. The decomposition ratios were calculated for PCE as 0,136 mg /gVSS.d respectively. The highest methane ratio in the obtained biogas was 68,3 % for CF. Also inhibition concentrations (IC) in 24 hour were determinated as IC50; 24,9 and IC25; 6,7.

 
Keywords: Wastewater, CF, UASB, anaerobic treatment, COD, methane.