TÖZÜM, Seda Süleyman Demirel Üniversitesi - Mühendislik Mimarlık Fakültesi - Çevre Mühendisligi Bölümü, Turkey , SEVNDR, Hüseyin Cahit Süleyman Demirel Üniversitesi - Mühendislik Mimarlık Fakültesi - Çevre Mühendisligi Bölümü, Turkey

Removal of COD from Olive Mill Wastewater (Blackwater) with Adsorption onto Pumice Stone

25189

Olive mill wastewater is characterized by high values of COD, BOD, and phenolic content. The aim of this study was to investigate removal of chemical oxygen demand from olive mill wastewater using raw pumice. Batch kinetic studies were carried out under varying experimental conditions of contact time and adsorbent dosage. The adsorption of chemical oxygen demand increased with increasing contact time and decreased with increasing amount of adsorbent used. The maximum adsorption capacity for raw pumice was reached in 5 h. Adsorption capacity increased with increasing temperature. Linear and non-linear regression methods were compared to determine the best fitting of kinetic model to experimental data. Non-linear regression method was found to be the more appropriate method to determine the rate kinetic parameters. In column studies, the effect of different adsorption parameters like flow rate, bed height and particle size on the adsorption capacity of the raw pumice was investigated. The percentage removal of COD was found to increase with increasing in bed height but decrease with increasing in both particle size and flow rate. For the small particle size and big particle size, the percentage removal during a contact time of 15 min were obtained as 80% and 70%, respectively.

104

Olive Mill Wastewater , Adsorption , Pumice , High COD , Adsorption Kinetics , Column Study

Journal Of Natural an‎d Applied Sciences

110