Bioremediation of contaminated soil and sediment by composting

Khan, Zareen; Anjaneyulu, Y.

doi:10.1002/rem.20105

Cited by 8 publications

(12 citation statements)

References 11 publications

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“…The final drop in the pH was due to the formation of organic acids from decomposition of fats and grease (Epstein, 1997). A similar pH trend was observed by Khan and Anjaneyulu (2006) who explained the rise in pH as due to the breakdown of protein into ammonia.…”

Section: Phsupporting

confidence: 72%

“…In the present study, the 68-73% degradation of PC was achieved in a much shorter period of time. Khan and Anjaneyulu (2006) achieved complete phenolic compounds and benzene degradation after 40 days of composting contaminated soil and sediment. Stoilova et al (2008) studied the biodegradation of mixtures of phenolic compounds by monocultures and mixed culture of Thermoascus aurantiacus and Aspergillus awamori and reported a negative interaction between the studied species.…”

Section: Lignocellulosementioning

confidence: 95%

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Biodegradation of Phenolic Compounds in Creosote Treated Wood Waste by a Composting Microbial Culture Augmented with the Fungus <i>Thermoascus aurantiacus</i>

Ghaly¹,

Zhang²,

Dave³

2011

American Journal of Biochemistry and Biotechnology

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Problem statement:Creosote is used as a wood preservative and water proof agent in railway sleepers, utility poles, buildings foundations and fences and garden furniture. It is a mixture of over 300 hydrocarbons which include 75% polycyclic aromatic hydrocarbons, 2-17% phenolic compounds and 10-18% heterocyclic organic compounds. Exposure to creosote may result in several health problems including damage to kidney, liver, eyes and skin. Potential contamination of soil and water exist from creosote treated wood from construction and demolition sites. Approach: The possibility of using an invessel composting process augmented with the ascomycetous fungus Thermoascus aurantiacus as a mesophilic/thermophilic bioremediation option for the degradation of phenolic compounds in creosote treated wood waste was evaluated. Results: The temperatures of bioremediation process reached thermophilic phase and the mesophilic and thermophilic lag phases were clearly identified. The moisture content decreased significantly indicating that the water produced by microbial respiration did not compensate for the water lost as vapor with the exhaust gases. Initial increases in pH due to the breakdown of organic nitrogen to ammonium and final drop in pH due to the formation of organic acids and the loss of ammonium with the exhaust gases in the latter stage were observed. Different degradation rates were observed in the mesophilic and thermophilic stages of composting. The control experiment achieved higher reductions of volatile solids, total carbon and TKN and higher degradation of phenolic compounds, cellulose and lignin, indicating a higher level of activity of microorganisms during the composting process compared with the inoculated experimental trial. The stability and maturity of the product of the control experiment were also better than those of the product from the inoculated experimental trial. Conclusion: The inoculation of the cellulolytic-thermophilic fungus Thermoascus aurantiacus did not accelerate the bioremediation process in degrading phenolic compounds and the fungus may have inhibited the growth and metabolic activities of composting organisms.

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Section: Phsupporting

confidence: 72%

Section: Lignocellulosementioning

confidence: 95%

Biodegradation of Phenolic Compounds in Creosote Treated Wood Waste by a Composting Microbial Culture Augmented with the Fungus <i>Thermoascus aurantiacus</i>

Ghaly¹,

Zhang²,

Dave³

2011

American Journal of Biochemistry and Biotechnology

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“…La máxima remoción de contaminantes se observó durante la fase de termofílica. El compost resultante podría emplearse como inóculo en procesos de descontaminación y/o como fertilizante [16].…”

Section: Estudios Desarrollados En Relación Con Tecnologías Para La Recuperación De Suelosunclassified

Análisis de tendencias en la recuperación de suelos empleando vigilancia tecnológica

Cabeza¹,

Tobar²,

Díaz³

et al. 2021

ITECKNE

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Las actividades antropogénicas han afectado recursos naturales limitados, como el recurso suelo, el cual soporta diferentes actividades que se pueden considerar indispensables para la humanidad. En este sentido, la salud del suelo es ampliamente estudiada desde lo académico, especialmente en el contexto de la recuperación de suelos degradados. Así, el presente documento desarrollo una vigilancia tecnológica que permitirá analizar la información disponible relacionada a técnicas de recuperación de suelos degradados, lo que permite presentar un contexto general, las técnicas y estudios más significativos del área. La vigilancia se realizó empleando las bases de datos de Scopus y ESPACENET, que corresponden a la búsqueda de artículos científicos y patentes, respectivamente. Se evaluaron indicadores relacionados al número de publicaciones, tipo de publicación, registro de patentes por país, entre otros. Se encontraron más de 22.907 artículos y 380 patentes que correspondían al objeto de la búsqueda. Estas investigaciones e invenciones se relacionan, en su mayoría, a procesos de fitorremediación enfocados en la problemática de contaminación de suelos por metales pesados, y se desarrollan en países como China y Estados Unidos, lo que se asocia al crecimiento de procesos agroindustriales altamente tecnificados, la mitigación de la degradación por contaminación antrópica y la búsqueda del desarrollo sostenible.

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“…Recent investigations also report the successful application of composting to the bioremediation of phenolic compounds. Khan and Anjaneyulu 74 investigated the lab-scale composting of sediment and soil contaminated with a phenolic mixture (0.016-0.024 g/kg) and benzene (0.003-0.007 g/kg). They proposed a procedure consisting of the addition of a commercial fertilizer and commercial compost to the soil (or sediment), as nutrient and microorganism sources, respectively.…”

Section: Compostingmentioning

confidence: 99%

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

Tomei

Daugulis

2012

Critical Reviews in Environmental Science and Technology

122

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Bioremediation as a sustainable alternative to chemical-physical processes is an attractive solution for soil decontamination and renewal of polluted sites. Depending on the site characteristics and target treatment requirements for the decontaminated soil, in situ or ex situ technologies are employed. Ex situ technologies are advantageous when a safe and effective intervention is required (i.e., in the presence of severe contamination of highly hazardous compounds). In this review, conventional and innovative ex situ technologies for soil bioremediation are presented. For each one the principle of operation and recent applications are reported. In addition, strategies to improve their efficiency are explored. Finally, the possibility of making these technologies more competitive by indicating research needs for their future development is highlighted.

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Bioremediation of contaminated soil and sediment by composting

Cited by 8 publications

References 11 publications

Biodegradation of Phenolic Compounds in Creosote Treated Wood Waste by a Composting Microbial Culture Augmented with the Fungus <i>Thermoascus aurantiacus</i>

Biodegradation of Phenolic Compounds in Creosote Treated Wood Waste by a Composting Microbial Culture Augmented with the Fungus <i>Thermoascus aurantiacus</i>

Análisis de tendencias en la recuperación de suelos empleando vigilancia tecnológica

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

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