Main Article Content
Wastewater treatment plants operators prefer to make adjustments because they are more cost effective, to use the existing tank instead of building new ones. In this case an imported materials would be used as bio-loads to increase biomass and thus maintain efficiency as the next organic loading increases.In the present study, a local substance "pumice stone" was used as a biological carrier in the aeration tank, and the experiments were carried out in five stages: without biological carriers, filling ratio of 4%,10%,20%, and25% with pumice stone, the maximum organic loading at each stage (1.1884, 1.2144, 1.9432, 2.7768, 3.3141)g BOD /l.d respectively.Other experiments were carried out to determine the best filling ratio, the SS removal ratio was (67.57%, 69.5%,79.44%,89.61%,and 99.2%) when the filling ratio with pumice stone was (0, 4, 10, 20, and 25)% respectively, at organic loading 2 ± 0.0528 g BOD /l.d, so the best filling ratio of pumice stone was 25% .
In this case an imported materials would be used as bio-loads to increase biomass and thus maintain efficiency as the next organic loading increases.
In this research, a local substance "pumice stone" was used as a biological carrier in the aeration tank, and the experiments were carried out in five stages: without biological carriers, filling ratio of 4%,10%,20%, and25% with pumice stone, The maximum organic loading at each stage (1.1884, 1.2144, 1.9432, 2.7768, 3.3141)g BOD /l.d respectively.
The SS removal ratio was when we operatio without biological carriers and with pumice stone with a filling ratio of 4% (82.86 % and 84.96 %) respectively, at organic loading 1.15 ± 0.0384 g BOD / d, the SS removal ratio when using pumice stone with a filling ratio of 4% and 10% was (80.36%, 91.59%) respectively, at organic loading 1.25 ± 0.024 g BOD /l.d
The SS removal ratio when using pumice stone with a filling ratio of 10% and 20% was (79.44%, 91.23%) respectively, at organic loading 2 ± 0.0528 g BOD /l.d , and The SS removal ratio when using pumice stone with a filling ratio of 20% and 25% was (80.45 %, 92.28%) respectively, at organic loading 2.85 ± 0.0624 g BOD /l.d ,which means there is improvement in yield using pumice stone with filling ratio 4%,10%,20 and 25% by 2.1% ,11.23%,11.79% and 11.83%, respectively.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Kim H-s, Gellner JW, Boltz JP, Freudenberg RG, Gunsch CK, Schuler AJ. Effects of integrated fixed film activated sludge media on activated sludge settling in biological nutrient removal systems. Water Res 44:1553–1561; 2010.
Mehrdadi N, Azimi A, Bidhendi GN, Hooshyari B . Determination of design criteria of an H-IFAS reactor in comparison with an extended aeration activated sludge process; 2007.
Regmi P, Thomas W, Schafran G, Bott C, Rutherford B, Waltrip D. Nitrogen removal assessment through nitrification rates and media biofilm accumulation in an IFAS process demonstration study. Water Res 45:6699–6708; 2011.
Rosso D, Lothman SE, Jeung MK, Pitt P, Gellner WJ, Stone AL, Howard D. Oxygen transfer and uptake, nutrient removal, and energy footprint of parallel full-scale IFAS and activated sludge processes. Water Res 45:5987–5996; 2011.
Andreottola G, Foladori P, Gatti G, Nardelli P, Pettena M, Ragazzi M . Upgrading of a small overloaded activated sludge plant using a MBBR system. J Environ Sci Health A 38:2317–2328; 2003.
Eslami H, Samaei MR, Shahsavani E, Ebrahimi AA . Biodegradation and fate of linear alkylbenzene sulfonate in integrated fixed-film activated sludge using synthetic media. Desalin Water Treat 92:128–133; 2017b.
Eslami et al," Biodegradation and nutrients removal from greywater by an integrated fixed‑film activated sludge (IFAS) in different organic loadings rates" . AMB Expr 8:3; 2018.https://doi.org/10.1186/s13568-017-0532-9
Pipraiya, A. Performance Evaluation of Wastewater Treatment Plant Based on MBBR Technology- A Case Study of Kaithal Town, Haryana (India): M.Tech Department of Civil Engineering, National Institute of Technology Kurukshetra Haryana, India; 2014.
Michael J. Shreve, Rachel A. Brennan,Trace organic contaminant removal in six full-scale integrated fixed film activated sludge (IFAS) systems treating municipal wastewater". Water Res.151 (2019) 318e331; 2019.www.elsevier.com/locate/waters
Sen.D,et al. Successful Evaulation Of Ten Ifas And Mmbr Facilities By Applying The Unified Model To Quantify Biofilm Surface Area Requirements For Nitrificaiton, Determine Its Accuracy In Prediciting Effluent Characteristics, And Underholder The Contribution Of Media Towards Organics Removal AndNitrification: Water Environment Foundation; 2006.
Mortazavi S.B. , Khavanin A. , Moussavi G. and Azhdarpoor A. Removal of Sodium Dodecyl Sulfate in an Intermittent Cycle Extended Aeration System: 11(2), 290-293; 2008.
Mota C. , Melanie A.H. , Ridenoure J.A. , Cheng J.J. and Reyes F.L. Effects of Aeration Cycles on Nitrifying Bacterial Populations and Nitrogen Removal in Intermittently Aerated Reactors:APPL ENVIRON MICROB, 71 (12), 8565–8572 ; 2005.