Optimization of hydraulic retention time (HRT) employing statistical tools of a lab-scale sequencing batch rector (SBR) treating real wastewater of a University campus
Paper Details
Optimization of hydraulic retention time (HRT) employing statistical tools of a lab-scale sequencing batch rector (SBR) treating real wastewater of a University campus
Abstract
Two lab-scale sequencing batch reactors (SBR) with combined capacity of 45 L/day, each having holding volume of 6 L were installed and operated at Institute of Environmental Sciences and Engineering (IESE) lab. The SBR systems were automated for variable hydraulic retention time (HRT) to treat real university wastewater (average COD = 220 mg/L). The HRT optimized based upon activated sludge growth pattern, and COD & BOD removal rates from unsteady to steady state condition. The optimized results will be utilized for under construction bio-tanks at the full scale membrane bioreactor (MBR) plant for reclamation and reuse of university wastewater. Each treatment cycle was operated with 2 and 3hr HRT (aeration time), followed by 30 minutes settling and 15 minutes decant time. The sludge withdrawal was based upon solids retention time (SRT) of 15 days and approximately 4 g/L mix liquor suspended solids (MLSS). Nutrient removal, COD, BOD, Total suspended solids (TSS), Total dissolved solids (TDS), temperature & pH, extracellular polymeric substances (EPS), microbial counts and Total Organic Carbon (TOC) for influent & effluent and sludge volume index (SVI), EPS, capillary suction time and MLSS/MLVSS for sludge were analyzed through standard operating procedures.
APHA. 2012. Standard methods for the examination of water and wastewater. (Washington: American Public Health Association).
Asadi A, Ziantizadeh AAL. 2011. Statistical analysis and optimization of an aerobic SBR treating an industrial estate wastewater using response surface methodology (RSM). Iranica Journal of Energy & Environment 2(4), 356-365.
Calderón K, Reboleiro-Rivas P, Rodríguez FA, Poyatos JM, González-López J, Rodelas B. 2013. Comparative analysis of the enzyme activities and the bacterial community structure based on the aeration source supplied to an MBR to treat urban wastewater. Journal of Environmental Management 128, 471-479.
Chan YJ, Chong MF, Law CL, Hassell DG. 2009. A review on anaerobic–aerobic treatment of industrial and municipal wastewater. Chemical Engineering Journal 155, 1–18.
Chen Q, Ni J, Ma T, Liu T, Zheng M. 2015. Bioaugmentation treatment of municipal waste water with heterotrophic-aerobic nitrogen removal bacteria in a pilot-scale SBR. Bioresource Technology 183, 25–32.
Hastuti E, Medawaty I, Pamekas R. 2011. Application of domestic wastewater. Journal of Applied Sciences in Environmental Sanitation 6(3), 367-376.
Kapdan IK, Oztekin R. 2006. The effect of hydraulic residence time and initial COD concentration on color and COD removal performance of the anaerobic–aerobic SBR system. Journal of hazardous materials 136(3), 896-901.
Lamine M, Bousselmi L, Ghrabi A. 2007. Biological treatment of grey water using sequencing batch reactor. Desalination 215, 127–132.
Lim JX, Vadivelu VM. 2014. Treatment of agro based industrial wastewater in sequencing batchreactor: Performance evaluation and growth kinetics of aerobic biomass. Journal of Environmental Management 146, 217-225.
Mamert OF, Hubert ZTS, Ernest K, Lie NTN, Simeon T. 2016. Influence of municipal and industrial pollution on the diversity and the structure of benthic macro invertebrates community of an urban river in Douala, Cameroon. Journal of Biodiversity and Environmental Sciences 8(6), 120-133.
Matsumoto EM, Osako MS, Pinho SC, Tommaso G, Gomes TM, Ribeiro R. 2012. Treatment of wastewater from dairy plants using Anaerobic Sequencing Batch Reactor (ASBR) following by Aerobic Sequencing Batch Reactor (SBR) aiming the removal of organic matter and nitrification. Water Practice & Technology 7(3) DOI: 10.2166/wpt.2012.048
Nawaz MS, Khan SJ. 2013. Effect of HRT on SBR Performance for Treatability of Combined Domestic and Textile Wastewaters. Journal of Chemical Society of Pakistan 35(2), 527-532.
The world bank report. 2005. 1818 H St NW Washington DC 20433 USA.
Xu S, Wub D, Hua Z. 2014. Impact of hydraulic retention time on organic and nutrient removal in a membrane coupled sequencing batch reactor water research 55, 12-20.
Ghalib Hasnain, Sher Jamal Khan, Saud Ahmed Khan, Usama Awais, Muhammad Junaid, Ahmed Ali, Nelufar Raza, Saimar Pervez, 2016. Optimization of hydraulic retention time (HRT) employing statistical tools of a lab-scale sequencing batch rector (SBR) treating real wastewater of a University campus. J. Biodiv. Environ. Sci., 9(2), 129-141.
Copyright © 2016 by the Authors. This article is an open access article and distributed under the terms and conditions of the Creative Commons Attribution 4.0 (CC BY 4.0) license.