Integration of swine manure anaerobic digestion and digestate nutrients removal/recovery under a circular economy concept

Autor: Bruno Venturin, Ricardo Luis Radis Steinmetz, Daniela Cândido, Gabriela Bonassa, Camila Ester Hollas, Alice Chiapetti Bolsan, Fabiane Goldschmidt Antes, Airton Kunz, Marcelo Bortoli, Deisi Cristina Tápparo
Rok vydání: 2022
Předmět:
Zdroj: Journal of Environmental Management. 301:113825
ISSN: 0301-4797
DOI: 10.1016/j.jenvman.2021.113825
Popis: The application of the circular economy concept should utilize the cycles of nature to preserve materials, energy and nutrients for economic use. A full-scale pig farm plant was developed and validated, showing how it is possible to integrate a circular economy concept into a wastewater treatment system capable of recovering energy, nutrients and enabling water reuse. A low-cost swine wastewater treatment system consisting of several treatment modules such as solid-liquid separation, anaerobic digestion, biological nitrogen removal by nitrification/denitrification and physicochemical phosphorus removal and recovery was able to generate 1880.6 ± 1858.5 kWh d−1 of energy, remove 98.6% of nitrogen and 89.7% of phosphorus present in the swine manure. In addition, it was possible to produce enough fertilizer to fertilize 350 ha per year, considering phosphorus and potassium. In addition, the effluent after the chemical phosphorus removal can be safely used in farm cleaning processes or disposed of in water bodies. Thus, the proposed process has proven to be an environmentally superior swine waste management technology, with a positive impact on water quality and ensuring environmental sustainability in intensive swine production.
Databáze: OpenAIRE
Externí odkaz: