Evaluation of Color and COD Removal Efficiency for Textile Finishing Wastewater Treated by Sequencing Batch Activated Sludge System (SBASS) Utilizing Different Adsorbents – 2013

Abstract

Waste water of textile industry includes high COD and colour. The colour of textile waste water results in an esthetic problem as well as toxicity for receiving bodies So, the colour in waste water must be removed before discharge to any surface water . The colour removal of textile waste water can not be achieved by conventional treatment processes, completely. So, it can be performed pratically using two approachs. First one is intensification of colour in the sludge. The second one is the decomposition of colourful molecules. At this point, it is very important to decide which approach is the most suitable for colour removal from wastewater in terms of  both environment and cost. In this study, since investigated plant’s wastewater is treated in a sequencing batch activated sludge system (SBASS), biological treatability studies were run without/with using different adsorbent materials such as Waste Aluminum Sludge, Granular Activate Carbon (GAC) and Poly Aluminum Chloride (PACl). In these studies, while maximum colour removal efficiencies were determined as 38%, 62% and 44% (Pt-Co) for above mentioned adsorbents, respectively, the study without adsorbent addition was only found  as %13 (Pt-Co). By the way, the cost assesment  based on  COD and  Colour removal efficiecies for all situations were estimated. According to this, while the best colour removal efficiencies were determined at 20 days sludge age as 38%, 62% and 44% (Pt-Co) for above mentioned adsorbents, respectively, the study run without adsorbent addition was only found  as %13 (Pt-Co).