Anaerobic digestion of a nonionic surfactant: inhibition effect and biodegradation

Jiménez-González, A.; Salazar-González, M.; Gutiérrez-Rojas, M.; Monroy, O.

doi:10.2166/wst.2001.0214

Cited by 21 publications

(7 citation statements)

References 6 publications

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“…Ferguson and Brown well [39] and Jimenez-Gonzalez et al [40], have reported poor anaerobic degradation due to detergents, mainly as a result of process inhibition [41][42]. Even though the kh values from this study are close to the values reported by Mahmoud [34] and Luo et al [15], and the values also fall within the ranges reported by Aldin [16], there is need for caution in comparison of the values due to the different experimental conditions.…”

Section: Discussionsupporting

confidence: 80%

Hydrolysis rates of domestic wastewater sludge using biochemical methane potential tests

2018

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Domestic wastewater treatment can be improved by reducing energy consumption and increasing carbon recovery, which can be achieved using anaerobic digestion of sludge with methane recovery at ambient temperature. Hydrolysis can be a limiting step in anaerobic digestion, and characterisation of hydrolysis rates and process models should improve design and operation of treatment systems. The hydrolysis of primary sludge and secondary sludge were examined using biochemical methane potential (BMP) tests, with the monitoring of volatile solids concentrations and pH values at 25 o C and 37 o C, and data analysis using MATLAB non-linear least squares curve fitting to a first order hydrolysis model. Low reduction of solids was observed at 25 o C compared to 37 o C, and higher hydrolysis rates at 25 o C than at 37 o C. A correlation was observed between the first order model, digestion time and the reduction of solids based on coefficients of determination (R 2 ). Model predictions were close to observed values, and therefore, the model should be reliable in predicting hydrolysis of sludge at 25 o C and 37 o C.

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Section: Discussionsupporting

confidence: 80%

Hydrolysis rates of domestic wastewater sludge using biochemical methane potential tests

2018

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“…The SDS was used below its CMC to minimize surfactant adsorption to GAC. Although Tween 80 was not the most effective non‐ionic surfactant, it is a food‐grade surfactant that may enhance contaminant biodegradation, while being less inhibitory toward some anaerobic cultures than either Brij 30 or Triton X‐100 ( Jiménez‐González et al, 2001 ; Yeh et al, 1998 ). Additionally, Tween 80 can be used at low concentrations because of its low CMC (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Desorption of RDX from Granular Activated Carbon

Morley

Speitel²,

Fatemi³

2006

Water Environment Research

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Several methods (cosolvents, surfactants, and cyclodextrins) were compared for improving desorption of a high explosive, RDX, from granular activated carbon (GAC). In batch desorption tests, 3% of the adsorbed RDX (initially 71.1 mg RDX/g GAC) was desorbed by water over 11 days, compared to 92.6% desorption by 100% ethanol. Solutions of ethanol or methanol in water also effectively desorbed RDX, although methanol was somewhat less effective than ethanol. Sodium dodecyl sulfate desorbed as much as 70% of the adsorbed RDX, while the non‐ionic surfactants Tween 80, Triton X‐100, and Brij 30 desorbed as much as 42 to 51% of the RDX. In continuous flow column tests, GAC was partially regenerated. One‐half of the adsorbed RDX was desorbed by 2100 bed volumes (BV) of 10% ethanol, compared to the 22 500 BV of buffered water. Column modeling indicated that competitive adsorption and altered equilibrium conditions combined to enhance RDX desorption.

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“…The inhibitory effect of a surfactant on the biodegradation capability may have its origin in any of the following (i) toxicity, (ii) preferential use as substrate, as carbon source alternative to the pollutant, (iii) low pollutant concentration in the aqueous phase by a miscellation effect or (iv) the possibility that the surfactant acts as an interference in the microbial metabolic processes 15. The surfactant Triton X100 has a toxic effect on aerobic microorganism,28 inhibiting the mineralization of glucose29 by anaerobic microorganisms30 acting as non‐competitive inhibitor on the acetogenic and methanogenic acetoclastic activities while affecting neither the fermentative nor the hydrogentrophic activities 31. These effects may be derived from an alteration in the function of the cell cytoplasmatic membrane29 due to the partial lysis that the surfactant Triton X100 exerts on the cell wall 32.…”

Section: Discussionmentioning

confidence: 99%

Effect of surfactants on the soil desorption of hexachlorocyclohexane (HCH) isomers and their anaerobic biodegradation

Quintero

Moreira

Feijoó

et al. 2005

J of Chemical Tech & Biotech

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The extensive utilization of hydrophobic organic compounds (HOCs) such as pesticides generates high environmental pollution levels. Due to their hydrophobicity, this type of compound tends to accumulate in soil organic matter and, thus, soil desorption limits their availability for microbial degradation. The use of surfactants may increase the pollutant's desorption from the soil. One of the pesticides with strong sorption characteristics is hexachlorocyclohexane (HCH), a mixture of isomers: α-, β-, γ -and δ-HCH. In this work, we evaluated the use of three surfactants, Triton X100, Tween 80 and sodium dodecyl sulfate (SDS), on the HCH desorption from a sandy loam soil. The effects of the addition of these surfactants on anaerobic biodegradation were studied. To attain this purpose, different assays were performed to evaluate both effects. Triton X100 exerted the best desorption of HCH isomers, followed by Tween 80, whereas SDS caused no significant desorption of the isomers. Triton had a strong inhibitory effect on the HCH biodegradation, while Tween 80 did not decrease the degradation rates of the different isomers. Moreover, the degradation rates of β-and δ-HCH were significantly enhanced (around 10%). On the other hand, detrimental effects on the biodegradation rates and yields were due to the ageing of the soil, depending on the period of exposure of the soil to the pollutant.

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Anaerobic digestion of a nonionic surfactant: inhibition effect and biodegradation

Cited by 21 publications

References 6 publications

Hydrolysis rates of domestic wastewater sludge using biochemical methane potential tests

Hydrolysis rates of domestic wastewater sludge using biochemical methane potential tests

Enhanced Desorption of RDX from Granular Activated Carbon

Effect of surfactants on the soil desorption of hexachlorocyclohexane (HCH) isomers and their anaerobic biodegradation

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