Effect of linear alkylbenzene sulphonates (LAS) on the anaerobic digestion of sewage sludge

Garcı́a, M. Teresa; Campos, E.; Sánchez‐Leal, J.; Ribosa, Isabel

doi:10.1016/j.watres.2006.05.033

Cited by 80 publications

(26 citation statements)

References 19 publications

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“…According to the mass balance of LAS, the degradation efficiency was equal to 28.5% (Table 2), which was lower than that (50-85%) of other UASB reactors under mesophilic conditions (30-37 °C) (Sanz et al, 2003;Lobner et al, 2005). Namely, the influent concentration used in previous studies was lower than those employed in the present investigation, which decreased the inhibitory potential of LAS (Mosche and Meyer, 2002;Garcia et al, 2006b). Lobner et al (2005) .…”

Section: Uasb Reactorcontrasting

confidence: 55%

“…Namely, inhibition of acetate and propionate degraders has been observed at LAS concentrations of 3-27 mg.L -1 (Mosche and Meyer, 2002;Garcia et al, 2006b), which increased the VFA content and led to instability in the bacterial consortium. Probably, the instability in the bacterial consortium decreased the LAS removal since the surfactant degradation requires the formation of consortium (Khleifat, 2006;Peressutti et al, 2008).…”

Section: Uasb Reactormentioning

confidence: 99%

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Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Okada

Esteves

Delforno

et al. 2013

Braz. J. Chem. Eng.

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-The removal of linear alkylbenzene sulfonate (LAS) was evaluated in a UASB reactor using shortchain alcohols (ethanol and methanol) and complex co-substrate (yeast extract). Using only methanol and ethanol as co-substrates resulted in removal of LAS between 30 and 41%. At the end, addition of a complex substrate (yeast extract) increased the removal of LAS to 50%. During the assay, water supply aeration increased the volatile fatty acid of the effluent (70 mg HAc.L -1 ) and decreased the removal of LAS (from 40 to 30%). According to the fluorescence in situ hybridization (FISH) results, the amount of Archaea decreased due to water supply aeration (from 64 to 48%). Furthermore, addition of complex co-substrate increased the total anaerobic bacteria and methanogenic archaea content (three and four log units, respectively), which were estimated using the most probable number technique.

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Section: Uasb Reactorcontrasting

confidence: 55%

Section: Uasb Reactormentioning

confidence: 99%

Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Okada

Esteves

Delforno

et al. 2013

Braz. J. Chem. Eng.

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“…Recently, Garcia et.al reported that for LAS, a widely used alkyl sulfate compound, a highly significant relationship between toxicity and alkyl chain length was evident with toxicity increasing with increasing alkyl chain length (32). Based on similar gene expression profiles observed for induction by exposure to SDS, C8, C6, and C4 (table 3), it appears that these compounds may cause toxicity via similar mechanisms.…”

Section: Structure Of N-alkyl Sulfates and Their Toxicitymentioning

confidence: 86%

Functional genomics analysis of n-alkyl sulfates toxicity in the yeast Saccharomyces cerevisiae

Sirisattha

Kitagawa²,

Yonekura³

et al. 2008

CBIJ

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The n-alkyl sulfates (AS) are a class of anionic surfactants that are widely used in industry and in consumer products. In this study, the effects of AS on yeast growth and genome wide transcriptional profiles were analysed by DNA microarray technology. Induced genes were categorized by localization of gene products and by function according to accepted gene ontologies using the MIPS database. A number of genes whose products localized to the cell wall and peroxisome were significantly induced. Genes involved in energy metabolism (i.e., fatty acid β-oxidation pathway) were also significantly induced. To confirm the role of these functions, the sensitivity of selected single gene deletion strains to sodium dodecyl sulfate (SDS) was tested. Deletion strains of cell wall maintenance genes (ΔGAS1, ΔKRE6, and ΔCHS5) were found to be highly sensitive. Interestingly, mutants deleted for genes in the fatty acid β-oxidation pathway were not found to be sensitive. However, regulating genes in the fatty acid β-oxidation pathway were found to respond to SDS exposure in a dose-dependent manner and to be involved in H 2 O 2 production. Here, we report a functional genomics analysis of genome-wide expression data to screen and evaluate AS toxicity in yeast. While the approach begins with a determination of highly-induced genes, its power lies in then determining the most relevant functions targeted by AS, and then assessing loss of key genes by evaluating AS sensitivity in the corresponding deletion mutants.

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“…They reported that the upper allowable LAS in a municipal wastewater treatment plant that employs anaerobic technology should be 14 mg LAS/gVSS. In another study by Garcia et al [46], they showed that addition of LAS to the anaerobic digesters increased the biogas production at concentrations of 5 to 10 g/kg dry sludge but at higher surfactant loads it caused inhibition of the methanogenic activity. Other surfactants have been studied by Pérez-Armendáriz et al [47], they investigated anaerobic biodegradability and inhibitory effects on methane production of three different surfactants, two anionic: sodium lauryl sulphate (SLS) and sodium dodecylbenzene sulphonate (SDBS), and a cationic surfactant: trialkyl-methylammonium chloride (TMAC), in two different anaerobic sludges-granular and flocculent.…”

Section: (2) Cleaning Chemicals Effect On Biological Processmentioning

confidence: 97%

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

et al. 2017

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This review article addresses wastewater treatment methods in the red meat processing industry. The focus is on conventional chemicals currently in use for abattoir wastewater treatment and energy related aspects. In addition, this article discusses the use of cleaning and sanitizing agents at the meat processing facilities and their effect on decision making in regard to selecting the treatment methods. This study shows that cleaning chemicals are currently used at a concentration of 2% to 3% which will further be diluted with the bulk wastewater. For example, for an abattoir that produces 3500 m 3 /day wastewater and uses around 200 L (3%) acid and alkaline chemicals, the final concentration of these chemical will be around 0.00017%. For this reason, the effects of these chemicals on the treatment method and the environment are very limited. Chemical treatment is highly efficient in removing soluble and colloidal particles from the red meat processing industry wastewater. Actually, it is shown that, if chemical treatment has been applied, then biological treatment can only be included for the treatment of the solid waste by-product and/or for production of bioenergy. Chemical treatment is recommended in all cases and especially when the wastewater is required to be reused or released to water streams. This study also shows that energy consumption for chemical treatment units is insignificant while efficient compared to other physical or biological units. A combination of a main (ferric chloride) and an aid coagulant has shown to be efficient and cost-effective in treating abattoir wastewater. The cost of using this combination per cubic meter wastewater treated is 0.055 USD/m 3 compared to 0.11 USD/m 3 for alum and the amount of sludge produced is 77% less than that produced by alum. In addition, the residues of these chemicals in the wastewater and the sludge have a positive or no impact on biological processes. Energy consumption from a small wastewater treatment plant (WWTP) installed to recycle wastewater for a meet facility can be around $500,000.

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Effect of linear alkylbenzene sulphonates (LAS) on the anaerobic digestion of sewage sludge

Cited by 80 publications

References 19 publications

Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Functional genomics analysis of n-alkyl sulfates toxicity in the yeast Saccharomyces cerevisiae

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

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