Biodegradation of phthalate esters during the mesophilic anaerobic digestion of sludge

Gavala, Hariklia N.; Alatriste‐Mondragón, Felipe; Iranpour, R.; Ahring, Birgitte Kiær

doi:10.1016/s0045-6535(03)00126-7

Cited by 119 publications

(64 citation statements)

References 22 publications

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“…Madsen et al [23] found that the firstorder kinetics rate (K h ) for DEHP removal from sludgeamended soil incubated under aerobic conditions was between 0.23 Â 10 À2 day À1 and 1.27 Â 10 À2 day À1 , while K h for sludge-amended soil incubated under anaerobic conditions K h was of about 0.23 Â 10 À2 day À1 . Gavala et al [30] found the same range of values for the biodegradation of DEHP during mesophilic anaerobic digestion of sludge: about 0.35 Â 10 À2 day À1 . Therefore, the much high rates determined in this study could reflect the aerobic conditions of medium.…”

Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 76%

“…Otherwise, the high levels of DEHP and relatively high levels of DBP in LS sludges can be attributed to the weak biodegradation under the anaerobic or methanogenic conditions in the wastewater plant lagoon [20,29,30].…”

Section: Levels Of Five Common Paes In Lagooning and Activated Sludgesmentioning

confidence: 99%

“…3 and 4). First-order kinetics is frequently used to describe the biodegradation of a substrate at a low concentration and leads to the estimation of the biodegradation rates [10,18,30]. Therefore, the biodegradation rate of DEHP was calculated using a first-order kinetic model with a least squares fitting method.…”

Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 99%

“…3) may lead to an inhibition or toxic effect on the microbial biodegradation. Some studies show that high levels of DEHP or other recalcitrant PAEs in the medium compromise the removal of biodegradable PAEs [28,30]. It has been hypothesized that DEHP affects the membrane of the microbial cells thus causing the inhibition.…”

Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 99%

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Fate of phthalic acid esters during composting of both lagooning and activated sludges

Amir¹,

Hafidi²,

Merlina³

et al. 2005

Process Biochemistry

126

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Among the phthalic acid esters (PAEs) targeted by the United States Environmental Protection Agency (USEPA) as priority pollutants, diethyl-hexyl phthalate (DEHP) is the major pollutant identified at high concentration level in lagooning sludge (LS), at about 28.67 mg/kg, and in activated sludge (AS), at about 6.26 mg/kg. Other phthalic acid esters, such as di-butyl phthalate (DBP) and di-methyl phthalate (DMP) show very low concentrations. During sludge composting, after the stabilization phase, the subsequent appearance of DEP and then DMP occurred indicating that microbial metabolism begins by alkyl side-chain degradation before aromatic ring-cleavage. The appearance and accumulation of PAEs with a short alkyl side-chain in the last stages of AS and LS composting is suggested originating from the degradation of phthalates with a much long side-chain. The DEHP showed a rate of biodegradation that follows a first-order kinetic model during composting of both AS and LS. The calculated DEHP half-lives are 45.4 days for LS and 28.9 days for AS. The better DEHP biodegradation rate (2.4 Â 10 À2 day À1 ) have been observed in the case of AS composting compared to LS compost (1.53 Â 10 À2 day À1 ). The mono-ethylhexyl phthalates MEHP has been shown to follow the same order of biodegradation as DEHP indicating that the same mechanism is followed (hydrolysis or dealkylation of each DEHP side-chain). Composting could be suggested as a detoxification process for the removal of PAEs (mainly DEHP) from sludges after a sufficient time of treatment to provide a safe end product.

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Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 76%

Section: Levels Of Five Common Paes In Lagooning and Activated Sludgesmentioning

confidence: 99%

Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 99%

Section: Biodegradation Of Dehp During Compostingmentioning

confidence: 99%

See 2 more Smart Citations

Fate of phthalic acid esters during composting of both lagooning and activated sludges

Amir¹,

Hafidi²,

Merlina³

et al. 2005

Process Biochemistry

126

View full text Add to dashboard Cite

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“…Anaerobic transformation of DEP apparently requires methanogenic conditions, resulting in production of the corresponding monoethyl isomer and phthalic acid, as observed in simulated landfill conditions (Ejlertsson et al 1996). Half-lives reported for anaerobic transformation of DEP are 33.6 days (Yuan et al 2002), and 8.6 and 10.9 days (Gavala et al 2003). …”

Section: Phthalate Plasticizersmentioning

confidence: 79%

Environmental Transport and Fate Process Descriptors for Propellant Compounds

Mirecki¹,

Porter²,

Weiss³

2006

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Sustainable management of Army training ranges requires quantification of the distribution, transport, and fate of munitions constituents (propellants and explosives) in soil, surface and groundwater. Propellant formulations are mixtures consisting of energetic compounds, binders, stabilizers, and burning-rate modifiers. Factors that affect the transport and fate of these diverse compounds include dissolution, sorption, biotransformation, volatilization, and photochemical transformation. This report summarizes the current understanding of these processes, and provides process descriptors for propellant compounds. Results of leaching experiments on representative single-base, double-base, and triple-base propellant mixtures also are presented.

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DEHP (Diethylhexylphtalat)

Litz

2004

Bodengefährdende Stoffe: Bewertung ‐ Stoffdaten ‐ Ökotoxikologie ‐ Sanierung

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Di‐2‐ethylhexylphthalat, DEHP (117‐81‐7, auch Phthalsäure‐di‐(2‐ethylhexyl)ester) ist ein weltweit eingesetztes Additiv (Weichmacher) zur Erlangung einer dauerhaften Haltbarkeit und Flexibilität von Kunststoffen. Durchschnittlich 95 % des DEHP wird für PVC in Mengenanteilen von 1–40 % verwendet. Weitere wichtige Phthalate sind DINP (Diisononylphthalat) und DIDP (Diisooctylphthalate); insgesamt werden davon ca. 1 Mio. Tonnen in Europa hergestellt. Auf Grund der enormen Verbrauchsmengen besitzen Phthalate eine große Bedeutung und werden eine bleibende Immission für den Boden darstellen. Die Gefahr auf Mensch und Umwelt wird als unerheblich angesehen (Ausnahmen bilden die vermuteten endokrinen Wirkungen).

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Biodegradation of phthalate esters during the mesophilic anaerobic digestion of sludge

Cited by 119 publications

References 22 publications

Fate of phthalic acid esters during composting of both lagooning and activated sludges

Fate of phthalic acid esters during composting of both lagooning and activated sludges

Environmental Transport and Fate Process Descriptors for Propellant Compounds

DEHP (Diethylhexylphtalat)

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