title: Powdered ZELIAC augmented sequencing batch reactors (SBR) process for co-treatment of landfill leachate and domestic wastewater.
abstract: Sequencing batch reactor (SBR) is one of the various methods of biological treatments used for treating wastewater and landfill leachate. This study investigated the treatment of landfill leachate and domestic wastewater by adding a new adsorbent (powdered ZELIAC; PZ) to the SBR technique. ZELIAC consists of zeolite, activated carbon, lime stone, rice husk ash, and Portland cement. The response surface methodology and central composite design were used to elucidate the nature of the response surface in the experimental design and describe the optimum conditions of the independent variables, including aeration rate (L/min), contact time (h), and ratio of leachate to wastewater mixture (%; v/v), as well as their responses (dependent variables). Appropriate conditions of operating variables were also optimized to predict the best value of responses. To perform an adequate analysis of the aerobic process, four dependent parameters, namely, chemical oxygen demand (COD), color, ammonia-nitrogen (NH3-N), and phenols, were measured as responses. The results indicated that the PZ-SBR showed higher performance in removing certain pollutants compared with SBR. Given the optimal conditions of aeration rate (1.74 L/min), leachate to wastewater ratio (20%), and contact time (10.31 h) for the PZ-SBR, the removal efficiencies for color, NH3-N, COD, and phenols were 84.11%, 99.01%, 72.84%, and 61.32%, respectively.
authors.affiliation: School of Civil Engineering, Engineering Campus, University Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
authors.forename: Amin
authors.initials: A
authors.lastname: Mojiri
authors.affiliation: School of Civil Engineering, Engineering Campus, University Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. Electronic address: cehamidi@usm.my.
authors.forename: Hamidi Abdul
authors.initials: HA
authors.lastname: Aziz
authors.affiliation: School of Civil Engineering, Engineering Campus, University Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
authors.forename: Nastaein Q
authors.initials: NQ
authors.lastname: Zaman
authors.affiliation: Department of Civil Engineering, College of Engineering, University of Salahaddin, Erbil, Iraq.
authors.forename: Shuokr Qarani
authors.initials: SQ
authors.lastname: Aziz
authors.affiliation: Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Zahed
mesh_terms: D000327:Adsorption; D000641:Ammonia / Q000032:analysis / Q000737:chemistry; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002119:Calcium Carbonate / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D012275:Oryza; D010636:Phenols / Q000032:analysis / Q000737:chemistry; D011208:Powders; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D000641:Ammonia; D002119:Calcium Carbonate; D002244:Carbon; D010636:Phenols; D011208:Powders; D062065:Wastewater; D014874:Water Pollutants, Chemical; D017641:Zeolites
keywords: Co-treatment; Landfill leachate; Phenols; Sequencing batch reactor; Wastewater; ZELIAC