Optimization and enhancement of soil bioremediation by composting using the experimental design technique
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The objective of this study was the application of the experimental design technique to optimize the conditions for the bioremediation of contaminated soil by means of composting. A low-cost material such as compost from the Organic Fraction of Municipal Solid Waste as amendment and pyrene as model pollutant were used. The effect of three factors was considered: pollutant concentration (0.1–2 g/kg), soil:compost mixing ratio (1:0.5–1:2 w/w) and compost stability measured as respiration index (0.78, 2.69 and 4.52 mg O2 g−1 Organic Matter h−1). Stable compost permitted to achieve an almost complete degradation of pyrene in a short time (10 days). Results indicated that compost stability is a key parameter to optimize PAHs biodegradation. A factor analysis indicated that the optimal conditions for bioremediation after 10, 20 and 30 days of process were (1.4, 0.78, 1:1.4), (1.4, 2.18. 1:1.3) and (1.3, 2.18, 1:1.3) for concentration (g/kg), compost stability (mg O2 g−1 Organic Matter h−1) and soil:compost mixing ratio, respectively.
KeywordsSoil bioremediation Compost stability Experimental design Pyrene Municipal solid waste
Financial support was provided by the Spanish Ministerio de Educación y Ciencia (Project CTM2006-00315/TECNO). T. Sayara thanks Agencia Española de Cooperación Internacional para el Desarrollo (AECID) for a pre-doctoral scholarship.
- Beaudin N, Caron RF, Legros R, Ramsay J, Lalor L, Ramsay B (1996) Composting of weathered hydrocarbon-contaminated soil. Compost Sci Util 4:37–45Google Scholar
- Cookson JT (1995) Bioremediation engineering design and application. McGraw-Hill, New York, USAGoogle Scholar
- Deming SN, Morgan SL (1987) Experimental design: a chemometric approach. Data handling in science and technology, vol 3. Elsevier, AmsterdamGoogle Scholar
- Gourlay C, Tusseau-Vuillemin MH, Garric J, Mouchel JM (2003) Effect of dissolved organic matter of various origins and biodegradability on the bioaccumulation of polycyclic aromatic hydrocarbons in Daphnia magna. Environ Toxicol Chem 22:288–1294Google Scholar
- Harrison RM (2001) Pollution: causes, effects and control, 4th edn. The Royal Society of Chemistry, BirminghamGoogle Scholar
- In BH, Park JS, Namkoong W, Kim JD, Ko BI (2007) Effect of sewage sludge mixing ratio on composting of TNT-contaminated soil. Ind Eng Chem Res 13:190–197Google Scholar
- Potter CL, Glaser JA, Hermann R, Dosani MA (1999) Remediation of contaminated east river sediment by composting technology. In: Leeson A, Alleman BC (eds) Bioremediation technologies for polycyclic aromatic hydrocarbon compounds. The fifth international in situ and on-site bioremediation symposium. Battelle Press, Columbus, pp 31–36Google Scholar
- Quadri G, Chen X, Jawitz JW, Tambone F, Genevini P, Faoro F, Adani F (2008) Biobased surfactant-like molecules from organic wastes: the effect of waste composition and composting process on surfactant properties and on the ability to solubilize Tetrachloroethene (PCE). Environ Sci Technol 42:2618–2623CrossRefPubMedGoogle Scholar
- Serrano Silva I, dos Santos E, de Menezes CR, Fonseca de Faria A, Franciscon E, Grossman M, Durrant LR (2009) Bioremediation of a polyaromatic hydrocarbon contaminated soil by native soil microbiota and bioaugmentation with isolated microbial consortia. Bioresour Technol 100:4669–4675CrossRefGoogle Scholar
- The US Department of Agriculture, The US Composting Council (2001) Test methods for the examination of composting and compost. Edaphos International, HoustonGoogle Scholar
- Thomas JM, Ward CH, Raymond RL, Wilson JT, Loehr RC (1992) Bioremediation. Encyclopaedia of microbiology. Academic Press, San DiegoGoogle Scholar