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Energy demand for phosphorus recovery from municipal wastewater
Mälardalen University, Sweden.ORCID-id: 0000-0002-9373-2774
Mälardalen University, Sweden.
Mälardalen University, Sweden.
2019 (Engelska)Ingår i: Energy Procedia, Elsevier Ltd , 2019, s. 4338-4343Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Phosphorus (P) is one of the essential nutrients for production of food. In modern agriculture, a large part of P comes from finite sources. There are several suggested processes for reuse of P from wastewater. In this paper, the energy use of direct reuse of sludge in agriculture is compared to the energy demand connected to use of mineral P and to reuse of P after thermal processing of sludge. The study is based on literature data from life cycle analysis (LCA). In the case of direct sludge reuse the sludge stabilization processes applied and the system boundaries of the LCA has a large impact on the calculated energy demand. The results though indicate that direct reuse of sludge in agriculture is the reuse scenario that potentially has the lowest energy demand (3-71 kWh/kg P), compared to incineration and extraction of P from sludge ashes (45-70 kWh/kg P) or pyrolysis of sludge (46-235 kWh/kg P). The competitiveness compared to mineral P (-4-22 kWh/kg P) depends on the mineral P source and production. For thermal processing, the energy demand derives mainly from energy needed to dry sludge and supplement fuel used during sludge incineration together with chemicals required to extract P. Local conditions, such as available waste heat for drying, can make one of these scenarios preferable. 

Ort, förlag, år, upplaga, sidor
Elsevier Ltd , 2019. s. 4338-4343
Nyckelord [en]
Combustion, Incineration, Nutrient reuse, Pyrolysis, Wastewater sludge, Agriculture, Energy management, Heat treatment, Life cycle, Minerals, Nutrients, Phosphorus, Waste heat, Waste incineration, Essential nutrients, Life cycle analysis, Local conditions, Modern agricultures, Municipal wastewaters, Phosphorus recovery, Sludge stabilization, Wastewater reclamation
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:ri:diva-72392DOI: 10.1016/j.egypro.2019.01.787Scopus ID: 2-s2.0-85063882988OAI: oai:DiVA.org:ri-72392DiVA, id: diva2:1846669
Konferens
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Tillgänglig från: 2024-03-25 Skapad: 2024-03-25 Senast uppdaterad: 2024-04-02Bibliografiskt granskad

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Sylwan, Ida

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