Chemical Removal of Phosphorus from Swine Effluent: the Impact of Previous Effluent Treatment Technologies on Process Efficiency
- 152 Downloads
Chemical phosphorus removal with hydrated lime was evaluated on effluents from different biological treatment processes applied to swine manure. The objective of this study was to establish the most suitable process for this kind of wastewater treatment. Effluents a UASB reactor, a nitrification reactor (NR), a modified Lutzak–Ettinger (MLE) reactor and a deammonification (DMX) reactor were evaluated. A comprehensive study was developed at laboratory scale to evaluate the effect of possible interferences, including alkalinity, total organic carbon, and ammonia, on phosphorus precipitation. The highest soluble phosphorus (Psol) removal efficiency and the lowest Ca:P molar ratio were obtained for the NR effluent (92% and 2.0, respectively). The good performance of the NR effluent could be attributed to the low level of ammoniacal nitrogen and alkalinity and to the presence of a relatively high concentration of calcium. Highly promising results were also obtained in field experiments, where a phosphorus removal unit was installed as the last step in a swine manure treatment system, and precipitation was applied to effluent from the NR. In this case, efficiencies of Psol removal higher than 90% were obtained. The produced sludge was rich in phosphorus and could be used as, for example, fertilizer. The results obtained in this work showed the importance of applying an efficient treatment system to swine manure for reduction of ammoniacal nitrogen, alkalinity, and carbon before chemical removal of phosphorus by precipitation with hydrated lime.
KeywordsPhosphorus removal Chemical process Hydrated lime Interferences
Special thanks to Mr. Carmo Holdefer for his help on the work in phosphorus removal unit.
This study is financially supported by the CAPES, CNPq, and Eletrosul.
- Adera, S., Drizo, A., Twohig, E., Jagannathan, K., & Benoit, G. (2018). Improving performance of treatment wetlands: Evaluation of supplemental aeration, varying flow direction, and phosphorus removing filters. Water, Air, and Soil Pollution, 229(100), 1–15. https://doi.org/10.1007/s11270-018-3723-3.CrossRefGoogle Scholar
- American Public Health Association. (2012). Standard methods for the examination of water and wastewater. (E. W. Rice & L. Bridgewater, Eds.) (22nd ed.). American Public Health Association.Google Scholar
- Chini, A., Kunz, A., Viancelli, A., Scussiato, L. A., Dias, J. R., & Jacinto, I. C. (2016). Recirculation and aeration effects on deammonification activity. Water, Air, and Soil Pollution, 227(2). https://doi.org/10.1007/s11270-016-2765-7.
- Estado de Santa Catarina. (2009). LEI No 14.675 Código Estadual do Meio Ambiente.Google Scholar
- Fernandes, G. W., Kunz, A., Steinmetz, R. L. R., Szogi, A., Vanotti, M., Flores, É. M. d. M., & Dressler, V. L. (2012). Chemical phosphorus removal: A clean strategy for piggery wastewater management in Brazil. Environmental Technology, 3314(14), 1677–1683. https://doi.org/10.1080/09593330.2011.642896.CrossRefGoogle Scholar
- Laridi, R., Auclair, J.-C., Benmoussa, H., & Benmoussa, A. H. (2017). Laboratory and pilot-scale phosphate and ammonium removal by controlled struvite precipitation following coagulation and flocculation of swine wastewater. Environmental Technology, 26, 525–536. https://doi.org/10.1080/09593332608618533.CrossRefGoogle Scholar
- Larsdotter, K., La, J., Jansen, C., & Dalhammar, G. (2017). Biologically mediated phosphorus precipitation in wastewater treatment with microalgae biologically mediated phosphorus precipitation in wastewater treatment with microalgae. Environmental Technology, 28, 953–960. https://doi.org/10.1080/09593332808618855.CrossRefGoogle Scholar
- Li, R. h., & Li, X. y. (2017). Recovery of phosphorus and volatile fatty acids from wastewater and food waste with an iron-flocculation sequencing batch reactor and acidogenic co-fermentation. Bioresource Technology, 245(September), 615–624. https://doi.org/10.1016/j.biortech.2017.08.199.CrossRefGoogle Scholar
- Loehr, R. C., T. B. S. Prakasam, E. G. Srinath, and Y. D. Y (1973). Nutriet removal from animal wastes.pdf.Google Scholar
- Ngatia, L. W., Hsieh, Y. P., Nemours, D., Fu, R., & Taylor, R. W. (2017). Potential phosphorus eutrophication mitigation strategy: Biochar carbon composition, thermal stability and pH influence phosphorus sorption. Chemosphere, 180, 201–211. https://doi.org/10.1016/j.chemosphere.2017.04.012.CrossRefGoogle Scholar
- Withers, P. J. A., Rodrigues, M., Soltangheisi, A., De Carvalho, T. S., Guilherme, L. R. G., Benites, V. D. M., et al. (2018). Transitions to sustainable management of phosphorus in Brazilian agriculture. Scientific Reports, 8(2537), 1–13. https://doi.org/10.1038/s41598-018-20887-z.CrossRefGoogle Scholar