Treatment of cattle slaughterhouse wastewater by sequential coagulation-flocculation/electrooxidation process

Year 2024, , 116 - 128, 21.06.2024

Nawid Ahmad Akhtar , Mehmet Kobya

https://doi.org/10.51354/mjen.1407291

Abstract

This study aimed to investigate the applicability and efficiency of sequential coagulation-flocculation (CF) and electrooxidation (EO) processes for cattle slaughterhouse wastewater by evaluating treatment efficiency and total operating cost values together. The effect of two different coagulant dosages (FeCl3 and alum) in the CF process and operating parameters such as current density (5 to 30 mA/cm2), wastewater flow rate (0.9 to 3.6 L/h), and supporting electrolyte concentration (1 to 3 g NaCl/L) in the EO process on chemical oxygen demand (COD) and turbidity removal were investigated. During the first part of the study, the FeCl3 coagulant dosage worked better than other coagulants, eliminating 50% of the COD and 68% of the turbidity. Due to the insufficient removal efficiencies of COD and turbidity, a secondary treatment was required. In the second part of the study, a boron-doped diamond (BDD) electrode was used to treat the coagulated effluent in a continuous EO reactor. The COD and turbidity removal efficiency under optimum treatment conditions (j = 30 mA/cm2, Q = 0.9 L/h, pH = 8.5, SE = 3.0 g NaCl/L, and hydraulic retention time = 1 hour) were calculated as 97.2% and 99.9%, respectively. At these optimum conditions, the energy consumption and total operating cost were calculated as 91.1 kWh/m3 (73.5 kWh/kg COD) and 3.50 US $/m3 (1.5 US $/kg COD), respectively. As a result, combined coagulation-flocculation and electrooxidation processes have proven to be very successful and cost-efficient for treating cattle slaughterhouse wastewater.

Keywords

Continuous electrooxidation reactor, Coagulation-flocculation, cattle Slaughterhouse, Treatment

References

• [1] C. F. Bustillo-Lecompte and M. Mehrvar, “Slaughterhouse wastewater characteristics, treatment, and management in the meat processing industry: A review on trends and advances,” J Environ Manage, vol. 161, pp. 287–302, Sep. 2015, doi: 10.1016/j.jenvman.2015.07.008.
• [2] E. Bazrafshan, F. Kord Mostafapour, M. Farzadkia, K. A. Ownagh, and A. H. Mahvi, “Slaughterhouse Wastewater Treatment by Combined Chemical Coagulation and Electrocoagulation Process,” PLoS One, vol. 7, no. 6, p. e40108, Jun. 2012, doi: 10.1371/journal.pone.0040108.
• [3] R. Terán Hilares, D. F. Atoche-Garay, D. A. Pinto Pagaza, M. A. Ahmed, G. J. Colina Andrade, and J. C. Santos, “Promising physicochemical technologies for poultry slaughterhouse wastewater treatment: A critical review,” J Environ Chem Eng, vol. 9, no. 2, p. 105174, Apr. 2021, doi: 10.1016/j.jece.2021.105174.
• [4] Ü. Tezcan Ün, A. S. Koparal, and Ü. Bakir Öğütveren, “Hybrid processes for the treatment of cattle- slaughterhouse wastewater using aluminum and iron electrodes,” J Hazard Mater, vol. 164, no. 2–3, pp. 580– 586, May 2009, doi: 10.1016/j.jhazmat.2008.08.045.
• [5] P. V. Ngobeni, M. Basitere, and A. Thole, “Treatment of poultry slaughterhouse wastewater using electrocoagulation: a review,” Water Pract Technol, vol. 17, no. 1, pp. 38–59, Jan. 2022, doi: 10.2166/wpt.2021.108.
• [6] P. W. Harris and B. K. McCabe, “Review of pre-treatments used in anaerobic digestion and their potential application in high-fat cattle slaughterhouse wastewater,” Appl Energy, vol. 155, pp. 560–575, Oct. 2015, doi: 10.1016/j.apenergy.2015.06.026.
• [7] T. Schmidt, B. K. McCabe, P. W. Harris, and S. Lee, “Effect of trace element addition and increasing organic loading rates on the anaerobic digestion of cattle slaughterhouse wastewater,” Bioresour Technol, vol. 264, pp. 51–57, Sep. 2018, doi: 10.1016/j.biortech.2018.05.050.
• [8] M. A. Musa and S. Idrus, “Physical and Biological Treatment Technologies of Slaughterhouse Wastewater: A Review,” Sustainability, vol. 13, no. 9, p. 4656, Apr. 2021, doi: 10.3390/su13094656.
• [9] R. Davarnejad, K. Sarvmeili, and M. Sabzehei, “Car Wash Wastewater Treatment Using an Advanced Oxidation Process: A Rapid Technique for the COD Reduction of Water Pollutant Sources,” J Mex Chem Soc, vol. 63, no. 4, Dec. 2019, doi: 10.29356/jmcs.v63i4.786.
• [10] D. Ozturk and A. E. Yilmaz, “Treatment of slaughterhouse wastewater with the electrochemical oxidation process: Role of operating parameters on treatment efficiency and energy consumption,” Journal of Water Process Engineering, vol. 31, p. 100834, Oct. 2019, doi: 10.1016/j.jwpe.2019.100834.
• [11] S. Keskes, F. Hmaied, H. Gannoun, H. Bouallagui, J. J. Godon, and M. Hamdi, “Performance of a submerged membrane bioreactor for the aerobic treatment of abattoir wastewater,” Bioresour Technol, vol. 103, no. 1, pp. 28–34, Jan. 2012, doi: 10.1016/j.biortech.2011.09.063.
• [12] D. I. Massé and L. Masse, “The effect of temperature on slaughterhouse wastewater treatment in anaerobic sequencing batch reactors,” Bioresour Technol, vol. 76, no. 2, pp. 91–98, Jan. 2001, doi: 10.1016/S0960-8524(00)00105-X.
• [13] M. Pronk, M. K. de Kreuk, B. de Bruin, P. Kamminga, R. Kleerebezem, and M. C. M. van Loosdrecht, “Full scale performance of the aerobic granular sludge process for sewage treatment,” Water Res, vol. 84, pp. 207–217, Nov. 2015, doi: 10.1016/j.watres.2015.07.011.
• [14] P. Bruno, R. Campo, M. G. Giustra, M. De Marchis, and G. Di Bella, “Bench scale continuous coagulation- flocculation of saline industrial wastewater contaminated by hydrocarbons,” Journal of Water Process Engineering, vol. 34, p. 101156, Apr. 2020, doi: 10.1016/j.jwpe.2020.101156.
• [15] M. Shestakova and M. Sillanpää, “Electrode materials used for electrochemical oxidation of organic compounds in wastewater,” Rev Environ Sci Biotechnol, vol. 16, no. 2, pp. 223–238, Jun. 2017, doi: 10.1007/s11157- 017-9426-1.
• [16] T. Le Luu, “Tannery wastewater treatment after activated sludge pre-treatment using electro-oxidation on inactive anodes,” Clean Technol Environ Policy, vol. 22, no. 8, pp. 1701–1713, Oct. 2020, doi: 10.1007/s10098- 020-01907-x.
• [17] C. A. Martínez-Huitle and S. Ferro, “Electrochemical oxidation of organic pollutants for the wastewater treatment: direct and indirect processes,” Chem. Soc. Rev., vol. 35, no. 12, pp. 1324–1340, 2006, doi: 10.1039/B517632H.
• [18] B. A. Fil and S. Günaslan, “Electrooxidation treatment of slaughterhouse wastewater: investigation of efficiency of Ti/Pt anode,” Particulate Science and Technology, vol. 41, no. 4, pp. 496–505, May 2023, doi: 10.1080/02726351.2022.2119905.
• [19] APHA, Standard Methods for the Examination of Water and Wastewater, 19th ed. Washington, DC., 1998.
• [20] M. Kobya and E. Demirbas, “Evaluations of operating parameters on treatment of can manufacturing wastewater by electrocoagulation,” Journal of Water Process Engineering, vol. 8, pp. 64–74, Dec. 2015, doi: 10.1016/j.jwpe.2015.09.006.
• [21] S. Verma, B. Prasad, and I. M. Mishra, “Pretreatment of petrochemical wastewater by coagulation and flocculation and the sludge characteristics,” J Hazard Mater, vol. 178, no. 1–3, pp. 1055–1064, Jun. 2010, doi: 10.1016/j.jhazmat.2010.02.047.
• [22] Ö. B. Gökçek and S. Özdemir, “Optimization of the Coagulation–Flocculation Process for Slaughterhouse Wastewater Using Response Surface Methodology,” Clean (Weinh), vol. 48, no. 7–8, Aug. 2020, doi: 10.1002/clen.202000033.
• [23] D. Ozturk, A. E. Yilmaz, and Z. Sapci Ayas, “Electrochemical mineralization of abattoir wastewater with continuous system,” International Journal of Environmental Science and Technology, vol. 18, no. 12, pp. 3761– 3776, Dec. 2021, doi: 10.1007/s13762-020-03109-w.
• [24] O. T. Can, E. Gengec, and M. Kobya, “TOC and COD removal from instant coffee and coffee products production wastewater by chemical coagulation assisted electrooxidation,” Journal of Water Process Engineering, vol. 28, pp. 28–35, Apr. 2019, doi: 10.1016/j.jwpe.2019.01.002.
• [25] S. O. Ganiyu, N. Oturan, S. Raffy, M. Cretin, C. Causserand, and M. A. Oturan, “Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media,” Sep Purif Technol, vol. 208, pp. 142–152, Jan. 2019, doi: 10.1016/j.seppur.2018.03.076.
• [26] H. Hai, X. Xing, S. Li, S. Xia, and J. Xia, “Electrochemical oxidation of sulfamethoxazole in BDD anode system: Degradation kinetics, mechanisms and toxicity evaluation,” Science of The Total Environment, vol. 738, p. 139909, Oct. 2020, doi: 10.1016/j.scitotenv.2020.139909.
• [27] E. Gengec, “Treatment of highly toxic cardboard plant wastewater by a combination of electrocoagulation and electrooxidation processes,” Ecotoxicol Environ Saf, vol. 145, pp. 184–192, Nov. 2017, doi: 10.1016/j.ecoenv.2017.07.032.
• [28] S. Periyasamy and M. Muthuchamy, “Electrochemical oxidation of paracetamol in water by graphite anode: Effect of pH, electrolyte concentration and current density,” J Environ Chem Eng, vol. 6, no. 6, pp. 7358–7367, Dec. 2018, doi: 10.1016/j.jece.2018.08.036.
• [29] P. Alfonso-Muniozguren, A. I. Gomes, D. Saroj, V. J. P. Vilar, and J. Lee, “The role of ozone combined with UVC/H2O2 process for the tertiary treatment of a real slaughterhouse wastewater,” J Environ Manage, vol. 289, p. 112480, Jul. 2021, doi: 10.1016/j.jenvman.2021.112480.