Evaluation of the Use of Sewage Sludge Biochar as a Soil Amendment—A Review

Elena Goldan, Valentin Nedeff, Narcis Barsan, Mihaela Culea, Claudia Tomozei, Mirela Panainte-Lehadus and Emilian Mosnegutu
Additional contact information
Elena Goldan: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Valentin Nedeff: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Narcis Barsan: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Mihaela Culea: Faculty of Letters, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Claudia Tomozei: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Mirela Panainte-Lehadus: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania
Emilian Mosnegutu: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, No. 157, 600115 Bacau, Romania

Sustainability, 2022, vol. 14, issue 9, 1-22

Abstract: In recent decades, minimization and recycling/reuse policies were introduced to reduce the quantities of generated waste and for alternative waste recovery. Organic wastes represent 46% of total global solid waste. Possible uses of organic wastes include using it as fertilizer and amendment for soil, for energy recovery and for the production of chemical substances. Sewage sludge disposal and reuse are identified as future problems concerning waste. The total amount of sludge generated in the entire world has increased dramatically, and this tendency is expected to increase significantly in the years to come. In most developed countries, special attention is given to sewage sludge treatment in order to improve the quality and safety of using it on the ground surface. Sewage sludge pyrolysis is considered an acceptable method, from an economic and ecological perspective, for the beneficial reuse of sewage sludge. This method has many advantages because, during the pyrolysis process, the sludge volume is reduced by 80%, pathogenic agents and hazardous compounds from sewage sludge are eliminated, metals are immobilized in solid residue and organic and inorganic fractions are immobilized in a stabilized form of pyrolytic residues (biochar). The biochar generated by sewage sludge pyrolysis does not contain pathogenic agents and is rich in carbon and nutrients.

Keywords: organic waste; sewage sludge; soil amendment; biochar (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/9/5309/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/9/5309/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:9:p:5309-:d:804158

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().