Protein hydrolysis under anaerobic, saline conditions in presence of acetic acid

González, Gerardo; Urrutia, Homero; Roeckel, Marlene; Aspé, Estrella

doi:10.1002/jctb.1165

Cited by 37 publications

(43 citation statements)

References 17 publications

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“…However, 20 g/L of acetate inhibited carbohydrate hydrolysis by 30%, which value did not agree with those obtained by or Babel et al (2004) without inhibition. The inhibitions by pH or VFA on protein hydrolysis were similar to those reported by González et al (2005).…”

Section: Discussionsupporting

confidence: 87%

“…Zou et al (2003) and , observed the decline in hydrolysis rate of biowaste caused by the accumulation of VFA. González et al (2005) found that the hydrolysis of soluble protein was completely inhibited at a concentration of acetate of over 1,000 mg/L. Anaerobic Digestion Model No.1 (ADM1) revealed that pH could inhibit hydrolysis, if required (Batstone et al, 2002).…”

Section: Introductionmentioning

confidence: 97%

“…The effect of pH on hydrolysis is typically qualitatively described or empirically determined by linear regression . Angelidaki et al (1999) and González et al (2005) used the non-competitive inhibition model to interpret hydrolysis data. González et al (2005) determined that the Levenspiel model and the Luong model fitted their data.…”

Section: Introductionmentioning

confidence: 99%

“…Angelidaki et al (1999) and González et al (2005) used the non-competitive inhibition model to interpret hydrolysis data. González et al (2005) determined that the Levenspiel model and the Luong model fitted their data. Competitive or incompetitive inhibition was seldom applied in the hydrolysis studies.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enzymatic hydrolysis of polysaccharide‐rich particulate organic waste

Lü

Shao

et al. 2006

Biotech & Bioengineering

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Hydrolysis of organic particulates in rapid fermentative processes can be inhibited. The volatile fatty acids (VFA) released during fermentation reduce pH. Whether VFA or the drop in pH inhibits hydrolysis is unclear. The effects of pH and acetate on the enzymatic hydrolysis of a potato sample that contains both carbohydrate and protein were studied at fixed pH (5-9) in the presence/absence of 20 g/L of acetate. Experimental results showed that the effects of pH and acetate on the hydrolysis of carbohydrate differed from those on the hydrolysis of protein. Numerous kinetic models fitted the hydrolysis data obtained during the first 40 h of hydrolysis when inhibitory effects were insignificant. The Chen-Hashimoto model was used herein to fit the hydrolysis data obtained during 144 h of reaction. Also, the non-competitive inhibition model of three inhibitors (H(+), OH(-), total/undissociated/dissociated acetate) successfully described the inhibition of the hydrolysis of both carbohydrate and protein.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enzymatic hydrolysis of polysaccharide‐rich particulate organic waste

Lü

Shao

et al. 2006

Biotech & Bioengineering

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“…Acetic acid was the dominant VFA observed in this study, followed by propionic and butyric acid. VFAs could be generated from hydrolysis and anaerobic digestion of carbohydrates (Babel et al, 2004;Gonzalez et al, 2005), fats, and proteins present in the waste and could accumulate when inadequate oxygen was supplied during aerobic biodegradation (Nicolas, 2006).…”

Section: Predominant Compoundsmentioning

confidence: 99%

Gaseous pollutants emitted from a mechanical biological treatment plant for municipal solid waste: Odor assessment and photochemical reactivity

Fang

Zhang

Yang

et al. 2013

Journal of the Air & Waste Management Association

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The concentrations and chromatographic profiles of gaseous pollutants emitted from a municipal solid waste (MSW) biological treatment plant were investigated to identify the major odor substances and atmospheric photochemical reactive species (PRS). Four methods were used to measure different gaseous pollutants in this study, including colorimetric tubes, gas chromatography with mass spectrometry/flame ionization detection/pulsed flame photometric detection (GC-MS/FID/PFPD) preceded by cold trap concentration, GC-FID preceded by solid-phase microextraction (SPME), and high-performance liquid chromatography (HPLC) after derivation by 2,4-dinitrophenylhydrazine (DNPH). Seventy-five gaseous compounds belonging to nine groups (nitrogen compounds, sulfur compounds, alkanes, alkenes, aromatics, terpenes, alcohols, carbonyls, and volatile fatty acids [VFAs]) were identified. In the prebiotreatment facility, the total concentration of the gaseous pollutants reached the maximum value on day 7 (317 ppm). During the postbiotreatment process, the total concentration of gaseous pollutants decreased from 331 ppm at the beginning to 162 ppm in the end. The group with the greatest decrease was carbonyls, from 64 to 7.4 ppm, followed by alcohols, from 40 to 4.5 ppm, which were both oxygenated compounds. The proportion of aromatics was notably high in the pre-mechanical treatment facility, accounting for 50.6% of the total, revealing the xenobiotic compounds disseminated by stirring and agitating the waste in the initial stage. The proportions of nitrogen compounds were lower in the pre-and post-mechanical treatment facilities (1.5% and 6.9%) than in the pre-and postbiotreatment facilities (11.9% and 13.8%), suggesting that their generation was closely associated with waste degradation. The major odor compounds in the facilities were acetic acid, butyric acid, valeric acid, isovaleric acid, and dimethyl sulfide. The major PRS in the facilities were aromatics, acetaldehyde, butyraldehyde, hexanal, isopentyl aldehyde, alcohol, a-pinene, limonene, and terpinene. Outside the facilities, VFAs and aromatics were the most important compounds causing an environmental impact.Implications: The aim of this work is to assess the gaseous environmental impacts of mechanical biological treatment technology. The emission of gaseous pollutants greatly affects the living quality of nearby residents and odor complaints are becoming a major problem now. In this study, the authors utilized various pretreatment and analytical methods to obtain integrated emission information of gaseous pollutants. The results showed the transformation and fate of the gas pollutants during the treatment processes, which would help to improve the processes and to mitigate gaseous pollution.

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Kinetics of syntrophic acetogenesis in a saline medium

Huiliñir

Roa

Vargas

et al. 2008

J of Chemical Tech & Biotech

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BACKGROUND: The anaerobic degradation kinetics of volatile fatty acids (VFA) in a saline (24 g NaCl dm −3 ) and mesophilic (37 • C) medium was studied under batch test conditions. The acetate production kinetics without inhibition by propionic, butyric and valeric acids was determined. The inhibition of acetate production during syntrophic acetogenesis by VFA and pH was studied. The acetogenesis without inhibition was modelled using a Monod equation. The pH inhibition was represented by a Michaelis pH function, while the inhibition by acetic acid (HAc) was represented by a non-competitive model.

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Protein hydrolysis under anaerobic, saline conditions in presence of acetic acid

Cited by 37 publications

References 17 publications

Enzymatic hydrolysis of polysaccharide‐rich particulate organic waste

Enzymatic hydrolysis of polysaccharide‐rich particulate organic waste

Gaseous pollutants emitted from a mechanical biological treatment plant for municipal solid waste: Odor assessment and photochemical reactivity

Kinetics of syntrophic acetogenesis in a saline medium

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