References
- APHA. 2005. Standard methods for the examination of water and wastewater. 21st ed. Washington, DC: American Public Health Association (APHA).
- Bougrier, C., C. Albasi, J. P. Delgenès, and H. Carrère. 2006. Effect of ultrasonic, thermal and ozone pre-treatments on waste activated sludge solubilisation and anaerobic biodegradability. Chemical Engineering and Processing: Process Intensification 45 (8):711–8. doi: https://doi.org/10.1016/j.cep.2006.02.005.
- Cai, Q. Y., C. H. Mo, Q. T. Wu, and Q. Y. Zeng. 2008. Polycyclic aromatic hydrocarbons and phthalic acid esters in the soil-radish (Raphanus sativus) system with sewage sludge and compost application. Bioresource Technology 99 (6):1830–6. doi: https://doi.org/10.1016/j.biortech.2007.03.035.
- Cao, Y., and A. Pawłowski. 2012. Sewage sludge-to-energy approaches based on anaerobic digestion and pyrolysis: Brief overview and energy efficiency assessment. Renewable and Sustainable Energy Reviews 16 (3):1657–65. doi: https://doi.org/10.1016/j.rser.2011.12.014.
- Dichtl, N., S. Rogge, and K. Bauerfeld. 2007. Novel strategies in sewage sludge treatment. CLEAN – Soil, Air, Water 35 (5):473–9. doi: https://doi.org/10.1002/clen.200720022.
- Dular, M., T. Griessler-Bulc, I. Gutierrez-Aguirre, E. Heath, T. Kosjek, A. Krivograd Klemenčič, M. Oder, M. Petkovšek, N. Rački, M. Ravnikar, et al. 2016. Use of hydrodynamic cavitation in (waste)water treatment. Ultrasonics Sonochemistry 29:577–88. doi: https://doi.org/10.1016/j.ultsonch.2015.10.010.
- Eftekharzadeh, S., D. Harrison, J. J. Marx, T. E. Wilson, E. Tech, B. Parkway, and L. Forest. 2007. Applying rheological techniques to upgrade anaerobic digesters and handle high solids concentrations. Water Practice 1 (1):1–9. doi: https://doi.org/10.2175/193317707X195971.
- Elalami, D., H. Carrere, F. Monlau, K. Abdelouahdi, A. Oukarroum, and A. Barakat. 2019. Pretreatment and co-digestion of wastewater sludge for biogas production: Recent research advances and trends. Renewable and Sustainable Energy Reviews 114:109287. doi: https://doi.org/10.1016/j.rser.2019.109287.
- Eurostat. 2020. Eurostat database [website accessed on May 16th, 2020].
- Feng, X., H. Lei, J. Deng, Q. Yu, and H. Li. 2009. Physical and chemical characteristics of waste activated sludge treated ultrasonically. Chemical Engineering and Processing: Process Intensification 48 (1):187–94. doi: https://doi.org/10.1016/j.cep.2008.03.012.
- Garuti, M., M. Langone, C. Fabbri, and S. Piccinini. 2018. Monitoring of full-scale hydrodynamic cavitation pretreatment in agricultural biogas plant. Bioresource Technology 247:599–609. doi: https://doi.org/10.1016/j.biortech.2017.09.100.
- Gianico, A., C. M. Braguglia, R. Cesarini, and G. Mininni. 2013. Reduced temperature hydrolysis at 134 °C before thermophilic anaerobic digestion of waste activated sludge at increasing organic load . Bioresource Technology 143:96–103. doi: https://doi.org/10.1016/j.biortech.2013.05.069.
- Gogate, P. R., and A. M. Kabadi. 2009. A review of applications of cavitation in biochemical engineering/biotechnology. Biochemical Engineering Journal 44 (1):60–72. doi: https://doi.org/10.1016/j.bej.2008.10.006.
- Graber, E. R., P. Fine, and G. J. Levy. 2006. Soil stabilization in semiarid and arid land agriculture. Journal of Materials in Civil Engineering 18 (2):190–205. doi: https://doi.org/10.1061/(ASCE)0899-1561(2006)18:2(190).
- Hai, N. M., S. Sakamoto, V. C. Le, H. S. Kim, R. Goel, M. Terashima, and H. Yasui. 2014. A modified anaerobic digestion process with chemical sludge pre-treatment and its modelling. Water Science and Technology 69 (11):2350–6. doi: https://doi.org/10.2166/wst.2014.164.
- Hirooka, K., R. Asano, A. Yokoyama, M. Okazaki, A. Sakamoto, and Y. Nakai. 2009. Reduction in excess sludge production in a dairy wastewater treatment plant via nozzle-cavitation treatment: Case study of an on-farm wastewater treatment plant. Bioresource Technology 100 (12):3161–6. doi: https://doi.org/10.1016/j.biortech.2009.01.011.
- Houtmeyers, S., J. Degrève, K. Willems, R. Dewil, and L. Appels. 2014. Comparing the influence of low power ultrasonic and microwave pre-treatments on the solubilisation and semi-continuous anaerobic digestion of waste activated sludge. Bioresource Technology 171:44–9. doi: https://doi.org/10.1016/j.biortech.2014.08.029.
- Hudcová, H., J. Vymazal, and M. Rozkošný. 2019. Present restrictions of sewage sludge application in agriculture within the European Union. Soil and Water Research 14 (No. 2):104–20. doi: https://doi.org/10.17221/36/2018-SWR.
- Kim, H., B. Koo, X. Sun, and J. Yong. 2020. Investigation of sludge disintegration using rotor-stator type hydrodynamic cavitation reactor. Separation and Purification Technology 240:116636. doi: https://doi.org/10.1016/j.seppur.2020.116636.
- Kumar, V., A. K. Chopra, and A. Kumar. 2017. A review on sewage sludge (Biosolids) a resource for sustainable agriculture. Archives of Agriculture and Environmental Science 2 (4):340–7. doi: https://doi.org/10.26832/24566632.2017.020417.
- Landry, H., F. Thirion, C. Laguë, and M. Roberge. 2006. Numerical modeling of the flow of organic fertilizers in land application equipment. Computers and Electronics in Agriculture 51 (1-2):35–53. doi: https://doi.org/10.1016/j.compag.2005.11.001.
- Langone, M., M. Soldano, C. Fabbri, F. Pirozzi, and G. Andreottola. 2018. Anaerobic digestion of cattle manure influenced by swirling jet induced hydrodynamic cavitation. Applied Biochemistry and Biotechnology 184 (4):1200–18. doi: https://doi.org/10.1007/s12010-017-2612-3.
- Le, N. T., C. Julcour-Lebigue, and H. Delmas. 2013. Ultrasonic sludge pretreatment under pressure. Ultrasonics Sonochemistry 20 (5):1203–10. doi: https://doi.org/10.1016/j.ultsonch.2013.03.005.
- Lee, I., and J. Han. 2013. The effects of waste-activated sludge pretreatment using hydrodynamic cavitation for methane production. Ultrasonics Sonochemistry 20 (6):1450–5. doi: https://doi.org/10.1016/j.ultsonch.2013.03.006.
- Lewis, D. L., and D. K. Gattie. 2002. Peer reviewed: Pathogen risks from applying sewage sludge to land. Environmental Science & Technology 36 (13):286A–93A. doi: https://doi.org/10.1021/es0223426.
- Liu, J., D. Yu, J. Zhang, M. Yang, Y. Wang, Y. Wei, and J. Tong. 2016. Rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H2O2 pretreatment. Water Research 98:98–108. doi: https://doi.org/10.1016/j.watres.2016.03.073.
- Lundin, M., M. Olofsson, G. J. Pettersson, and H. Zetterlund. 2004. Environmental and economic assessment of sewage sludge handling options. Resources, Conservation and Recycling 41 (4):255–78. doi: https://doi.org/10.1016/j.resconrec.2003.10.006.
- Mancuso, G. 2018. Experimental and numerical investigation on performance of a swirling jet reactor. Ultrasonics Sonochemistry 49:241–8. doi: https://doi.org/10.1016/j.ultsonch.2018.08.011.
- Mancuso, G., M. Langone, and G. Andreottola. 2017. A swirling jet-induced cavitation to increase activated sludge solubilisation and aerobic sludge biodegradability. Ultrasonics Sonochemistry 35 (Pt A):489–501. doi: https://doi.org/10.1016/j.ultsonch.2016.11.006.
- Mancuso, G., M. Langone, and G. Andreottola. 2020. A critical review of the current technologies in wastewater treatment plants by using hydrodynamic cavitation process: Principles and applications. Journal of Environmental Health Science & Engineering 18 (1):311–33. doi: https://doi.org/10.1007/s40201-020-00444-5.
- Mancuso, G., M. Langone, G. Andreottola, and L. Bruni. 2019. Effects of hydrodynamic cavitation, low-level thermal and low-level alkaline pre-treatments on sludge solubilisation. Ultrasonics Sonochemistry 59:104750. doi: https://doi.org/10.1016/j.ultsonch.2019.104750.
- Mancuso, G., M. Langone, M. Laezza, and G. Andreottola. 2016. Decolourization of Rhodamine B: A swirling jet-induced cavitation combined with NaOCl. Ultrasonics Sonochemistry 32:18–30. doi: https://doi.org/10.1016/j.ultsonch.2016.01.040.
- Nabi, M., G. Zhang, P. Zhang, X. Tao, S. Wang, J. Ye, Q. Zhang, M. Zubair, S. Bao, and Y. Wu. 2019. Contribution of solid and liquid fractions of sewage sludge pretreated by high pressure homogenization to biogas production. Bioresource Technology 286:121378. doi: https://doi.org/10.1016/j.biortech.2019.121378.
- Pilli, S., S. Yan, R. D. Tyagi, and R. Y. Surampalli. 2015. Thermal pretreatment of sewage sludge to enhance anaerobic digestion: A review. Critical Reviews in Environmental Science and Technology 45 (6):669–702. doi: https://doi.org/10.1080/10643389.2013.876527.
- Pourcher, A. M., P. B. Françoise, F. Virginie, G. Agnieszka, S. Vasilica, and M. Gérard. 2007. Survival of faecal indicators and enteroviruses in soil after land-spreading of municipal sewage sludge. Applied Soil Ecology 35 (3):473–9. doi: https://doi.org/10.1016/j.apsoil.2006.10.005.
- Prabu, S. L., T. K. N. Suriyaprakash, R. Kandasamy, and T. Rathinasabapathy. 2020. Effective waste water treatment and its management. In Waste management: Concepts, methodologies, tools, and applications, 49–72. IGI Global.
- Prasad, M. N. V., P. J. Favas, C. de, M. Vithanage, and S. Venkata Mohan, ed. 2019. Industrial and municipal sludge: Emerging concerns and scope for resource recovery. Butterworth-Heinemann.
- Puiseau, W. D. E., G. Andreottola, E. C. Rada, and M. Ragazzi. 2015. Application of a novel hydrodynamic cavitation system in wastewater treatment plants. UPB Scientific Bulletin, Series D: Mechanical Engineering 77 (1):225–34.
- Ratkovich, N., W. Horn, F. P. Helmus, S. Rosenberger, W. Naessens, I. Nopens, and T. R. Bentzen. 2013. Activated sludge rheology: A critical review on data collection and modelling. Water Res 47 (2):463–82. doi: https://doi.org/10.1016/j.watres.2012.11.021.
- Ruffino, B., G. Campo, G. Genon, L. Eugenio, D. Novarino, G. Scibilia, and M. Zanetti. 2015. Improvement of anaerobic digestion of sewage sludge in a wastewater treatment plant by means of mechanical and thermal pre-treatments: Performance, energy and economical assessment. Bioresource Technology 175:298–308. doi: https://doi.org/10.1016/j.biortech.2014.10.071.
- Ruiz-Hernando, M., G. Martinez-Elorza, J. Labanda, and J. Llorens. 2013. Dewaterability of sewage sludge by ultrasonic, thermal and chemical treatments. Chemical Engineering Journal and the Biochemical Engineering Journal 230:102–10. doi: https://doi.org/10.1016/j.cej.2013.06.046.
- Salsabil, M. R., A. Prorot, M. Casellas, and C. Dagot. 2009. Pre-treatment of activated sludge: Effect of sonication on aerobic and anaerobic digestibility. Chemical Engineering Journal and the Biochemical Engineering Journal 148 (2-3):327–35. doi: https://doi.org/10.1016/j.cej.2008.09.003.
- Sanin, F. D. 2002. Effect of solution physical chemistry on the rheological properties of activated sludge. Water SA 28 (2):207–11. doi: https://doi.org/10.4314/wsa.v28i2.4886.
- Song, U., and E. U. Lee. 2010. Environmental and economical assessment of sewage sludge compost application on soil and plants in a landfill. Resources, Conservation and Recycling 54 (12):1109–16. doi: https://doi.org/10.1016/j.resconrec.2010.03.005.
- Suenaga, T., M. Nishimura, H. Yoshino, H. Kato, M. Nonokuchi, T. Fujii, H. Satoh, A. Terada, and M. Hosomi. 2015. High-pressure jet device for activated sludge reduction: Feasibility of sludge solubilization. Biochemical Engineering Journal 100:1–8. doi: https://doi.org/10.1016/j.bej.2015.03.022.
- Tanaka, S., T. Kobayashi, K. I. Kamiyama, and M. Bildan. 1997. Effects of thermochemical pretreatment on the anaerobic digestion of waste activated sludge. Water Science and Technology 35 (8):209–15. doi: https://doi.org/10.2166/wst.1997.0315.
- Tyagi, V. K., S.-L. Lo, L. Appels, and R. Dewil. 2014. Ultrasonic treatment of waste sludge: A review on mechanisms and applications. Critical Reviews in Environmental Science and Technology 44 (11):1220–88. doi: https://doi.org/10.1080/10643389.2013.763587.
- Tyagi, V. K., S. L. Lo, and A. Rajpal. 2014. Chemically coupled microwave and ultrasonic pre-hydrolysis of pulp and paper mill waste-activated sludge: Effect on sludge solubilisation and anaerobic digestion. Environmental Science and Pollution Research International 21 (9):6205–17. doi: https://doi.org/10.1007/s11356-013-2426-y.
- Tytła, M., and E. Zielewicz. 2018. The impact of temporal variability of excess sludge characteristics on the effects obtained in the process of its ultrasonic disintegration. Environmental Technology 39 (23):3020–32. doi: https://doi.org/10.1080/09593330.2017.1371251.
- United-Nations. 2018. Sustainable Development Goals (SDGs) in Agenda 2030: Clean Water and Sanitation (SDG 6).
- Usman, K., S. Khan, S. Ghulam, M. U. Khan, N. Khan, M. A. Khan, and S. K. Khalil. 2012. Sewage sludge: An important biological resource for sustainable agriculture and its environmental implications. American Journal of Plant Sciences 03 (12):1708–21. doi: https://doi.org/10.4236/ajps.2012.312209.
- Van den Berg, P., E. Huerta-Lwanga, F. Corradini, and V. Geissen. 2020. Sewage sludge application as a vehicle for microplastics in eastern Spanish agricultural soils. Environmental Pollution 261:114198. doi: https://doi.org/10.1016/j.envpol.2020.114198.
- Verma, M., S. K. Brar, A. R. Riopel, R. D. Tyagi, and R. Y. Surampalli. 2007. Pre-treatment of wastewater sludge-biodegradability and rheology study. Environmental Technology 28 (3):273–84. doi: https://doi.org/10.1080/09593332808618788.
- Wang, X., T. Chen, Y. Ge, and Y. Jia. 2008. Studies on land application of sewage sludge and its limiting factors. Journal of Hazardous Materials 160 (2-3):554–8. doi: https://doi.org/10.1016/j.jhazmat.2008.03.046.
- Zhang, G., P. Zhang, J. Yang, and H. Liu. 2008. Energy-efficient sludge sonication: Power and sludge characteristics. Bioresource Technology 99 (18):9029–31. doi: https://doi.org/10.1016/j.biortech.2008.04.021.
- Zielewicz, E. 2016. Effects of ultrasonic disintegration of excess sewage sludge. Applied Acoustics 103:182–9. doi: https://doi.org/10.1016/j.apacoust.2015.05.007.