TY - JOUR
T1 - Biochar production from Cypress sawdust and olive mill wastewater
T2 - Agronomic approach
AU - Haddad, Khouloud
AU - Jeguirim, Mejdi
AU - Jellali, Salah
AU - Thevenin, Nicolas
AU - Ruidavets, Lionel
AU - Limousy, Lionel
N1 - Funding Information:
This work was financially supported by the “PHC Utique” program of the French Ministry of Foreign Affairs and Ministry of Higher Education and Research and the Tunisian Ministry of higher education and scientific research in the GEDURE Project (N° 34863VB ) and the authors gratefully acknowledge the “Comité Mixte franco-tunisien pour la Coopération Universitaire (CMCU)” for their support. Authors would like also to thank the Carnot MICA institute for funding the experimental tests in the frame of CARBOVIT project.
Publisher Copyright:
© 2020
PY - 2021/1/15
Y1 - 2021/1/15
N2 - Olive mill wastewater (OMW) is nowadays considered as a serious source pollution. At the same time, it contains high amounts of nutrients, especially potassium and phosphorus that could be recovered for agricultural purposes. The aim of the current experimental research work is to investigate the agronomic potential use of OMW based biochar produced from the slow pyrolysis at 500 °C of raw cypress sawdust (CS) impregnated with OMW (ICS-OMW-B). In order to understand the contribution of OMW, two additional biochars were produced from raw cypress sawdust (RCS-B) and cypress sawdust pretreated with potassium chloride (ICS-K-B). Results indicated that RCS impregnation by OMW significantly improved the produced biochar's chemical properties, especially its nutrients contents. Furthermore, in comparison with the other biochars, ICS-OMW-B application as an organic fertilizer showed promising results in terms of produced fresh and dry masses, as well as potassium bioavailability as assessed in test experiments with ryegrass. For instance, the dry matter masses of the rye-grass treated with ICS-OMW-B were about 23, 34 and 50 wt% higher than the ones measured for the tests using RCS-B, ICS-K-B and synthetic K-fertilizer as amendments, respectively. Besides, this biochar has a potential effect on the suppression of various pathogens existing in the tested agricultural soil. All these results demonstrated that the biochar generated from the slow pyrolysis of impregnated sawdust with OMW could be considered as attractive and promising organic fertilizer for acidic agricultural soils.
AB - Olive mill wastewater (OMW) is nowadays considered as a serious source pollution. At the same time, it contains high amounts of nutrients, especially potassium and phosphorus that could be recovered for agricultural purposes. The aim of the current experimental research work is to investigate the agronomic potential use of OMW based biochar produced from the slow pyrolysis at 500 °C of raw cypress sawdust (CS) impregnated with OMW (ICS-OMW-B). In order to understand the contribution of OMW, two additional biochars were produced from raw cypress sawdust (RCS-B) and cypress sawdust pretreated with potassium chloride (ICS-K-B). Results indicated that RCS impregnation by OMW significantly improved the produced biochar's chemical properties, especially its nutrients contents. Furthermore, in comparison with the other biochars, ICS-OMW-B application as an organic fertilizer showed promising results in terms of produced fresh and dry masses, as well as potassium bioavailability as assessed in test experiments with ryegrass. For instance, the dry matter masses of the rye-grass treated with ICS-OMW-B were about 23, 34 and 50 wt% higher than the ones measured for the tests using RCS-B, ICS-K-B and synthetic K-fertilizer as amendments, respectively. Besides, this biochar has a potential effect on the suppression of various pathogens existing in the tested agricultural soil. All these results demonstrated that the biochar generated from the slow pyrolysis of impregnated sawdust with OMW could be considered as attractive and promising organic fertilizer for acidic agricultural soils.
KW - Biochar
KW - Cypress sawdust
KW - Impregnation
KW - Olive mill wastewater
KW - Organic fertilizer
KW - Pyrolysis
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U2 - 10.1016/j.scitotenv.2020.141713
DO - 10.1016/j.scitotenv.2020.141713
M3 - Article
C2 - 32892041
AN - SCOPUS:85090223186
SN - 0048-9697
VL - 752
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 141713
ER -