University of Oulu

Tuomikoski, S. & Prokkola, H. & Van der Aa, S. & Sauvola, E. & Pesonen, J. (2019) Preparation of sludge-based recycled fertilizer. In: Proceedings of the Seventh International Conference on Environmental Management, Engineering, Planning & Economics. Mykonos Island, Greece, May 19-24, 2019, pp. 312-319.

Preparation of sludge-based recycled fertilizer

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Author: Tuomikoski, S.1; Prokkola, H.1; Van der Aa, S.1;
Organizations: 1Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 4300, 90014 University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2019062421749
Language: English
Published: Aristotle University of Thessaloniki and Society of Ecotoxicology and Environmental Safety (SECOTOX), 2019
Publish Date: 2019-06-24
Description:

Abstract

Phosphorus and nitrogen are the main nutrients in agricultural and municipal sludges. They runoff easily to waterways especially when sludges are used as fertilizers. The main goal of this study was to create a slow-release sludge-based recycled fertilizer that is stable and easy to handle and spread. The production of recycled fertilizer contained four steps: 1) adjusting and decreasing the pH of the sludge to prevent ammonium evaporating as ammonia, 2) drying the sludge to a suitable moisture content to enable granulation and pelleting, 3) granulating or pelleting the sludge with some additives to improve the quality of the fertilizer, 4) drying the produced fertilizers at room temperature. Additives in the granulation or pelleting process were biocarbon, calcium hydroxide or ammoniumsulfate. Elemental analysis and leaching tests of mixed recycled fertilizer product provided information about the mechanical strength and the total and soluble nutrient contents.

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ISBN Print: 978-618-5271-73-2
Pages: 312 - 319
Host publication: Proceedings of the Seventh International Conference on Environmental Management, Engineering, Planning & Economics. Mykonos Island, Greece, May 19-24, 2019
Conference: International Conference on Environmental Management, Engineering, Planning & Economics (CEMEPE)
Type of Publication: B3 Article in conference pro-ceedings
Field of Science: 116 Chemical sciences
Subjects:
Copyright information: © 2019 The Authors and Aristotle University of Thessaloniki and Society of Ecotoxicology and Environmental Safety.