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The use of elemental sulphur as organic alternative to control pH during composting of olive mill wastes.
Chemosphere. 2004 Dec; 57(9):1099-105.C

Abstract

High values of pH may represent a limitation for the agricultural use of the composts, not only when used as soil-less substrate but also as soil amendment in high pH soils. The addition of elemental S during the maturation phase of the composting process was evaluated as suitable method to reduce pH of the composts under the organic agriculture regulations. A compost prepared with two phase olive mill waste (OMW) and sheep litter (SL) was used to study the effect of elemental sulphur addition on the pH of the composting mixture. Initially, different bench scale experiments were designed in order to study the influence of moisture, sulphur concentration, and incubation temperature on the sulphur oxidation rate and thus on the pH of the compost. A concentration of 0.5% in sulphur (dry weight basis) and moisture of 40% were proposed as the optimum conditions to decrease the compost pH by 1.1 units without increasing in EC to levels that may suppose a limitation for its agricultural use. Finally, these optimum experimental conditions found at bench scale were tested at full scale in a commercial composting plant treating the same organic materials by windrowing. The pH values of the composting mixture were reduced by one unit after 2 weeks following the addition of elemental S causing no negative effects on the final compost quality.

Authors+Show Affiliations

Department of Soil and Water Conservation and Organic Waste Management, Centro de Edafologiía y Biología Aplicada del Segura, CSIC, Campus Universitario de Espinardo, 30100 Espinardo Murcia, Spain. aroig@cebas.csic.esNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15504468

Citation

Roig, A, et al. "The Use of Elemental Sulphur as Organic Alternative to Control pH During Composting of Olive Mill Wastes." Chemosphere, vol. 57, no. 9, 2004, pp. 1099-105.
Roig A, Cayuela ML, Sánchez-Monedero MA. The use of elemental sulphur as organic alternative to control pH during composting of olive mill wastes. Chemosphere. 2004;57(9):1099-105.
Roig, A., Cayuela, M. L., & Sánchez-Monedero, M. A. (2004). The use of elemental sulphur as organic alternative to control pH during composting of olive mill wastes. Chemosphere, 57(9), 1099-105.
Roig A, Cayuela ML, Sánchez-Monedero MA. The Use of Elemental Sulphur as Organic Alternative to Control pH During Composting of Olive Mill Wastes. Chemosphere. 2004;57(9):1099-105. PubMed PMID: 15504468.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The use of elemental sulphur as organic alternative to control pH during composting of olive mill wastes. AU - Roig,A, AU - Cayuela,M L, AU - Sánchez-Monedero,M A, PY - 2003/12/11/received PY - 2004/07/23/revised PY - 2004/08/10/accepted PY - 2004/10/27/pubmed PY - 2005/3/25/medline PY - 2004/10/27/entrez SP - 1099 EP - 105 JF - Chemosphere JO - Chemosphere VL - 57 IS - 9 N2 - High values of pH may represent a limitation for the agricultural use of the composts, not only when used as soil-less substrate but also as soil amendment in high pH soils. The addition of elemental S during the maturation phase of the composting process was evaluated as suitable method to reduce pH of the composts under the organic agriculture regulations. A compost prepared with two phase olive mill waste (OMW) and sheep litter (SL) was used to study the effect of elemental sulphur addition on the pH of the composting mixture. Initially, different bench scale experiments were designed in order to study the influence of moisture, sulphur concentration, and incubation temperature on the sulphur oxidation rate and thus on the pH of the compost. A concentration of 0.5% in sulphur (dry weight basis) and moisture of 40% were proposed as the optimum conditions to decrease the compost pH by 1.1 units without increasing in EC to levels that may suppose a limitation for its agricultural use. Finally, these optimum experimental conditions found at bench scale were tested at full scale in a commercial composting plant treating the same organic materials by windrowing. The pH values of the composting mixture were reduced by one unit after 2 weeks following the addition of elemental S causing no negative effects on the final compost quality. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/15504468/The_use_of_elemental_sulphur_as_organic_alternative_to_control_pH_during_composting_of_olive_mill_wastes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(04)00672-1 DB - PRIME DP - Unbound Medicine ER -