Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

Cuetos, M.J.; Gómez, Xiomar; Otero, Marta; Morán, Antonio

doi:10.1007/s10532-009-9322-7

Cited by 48 publications

(23 citation statements)

References 62 publications

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“…A mass loss registered above 500°C was also reported by Lopez-Capel et al (2006), this being associated with polycondensation and the formation of increasingly stable C and N forms in the study of the fungal degradation of wheat straw. The formation of complex molecules containing N, has also been reported by Cuetos et al (2009Cuetos et al ( , 2010 in the study of anaerobic digestion of slaughterhouse wastes, with thermal profiles presenting high intensity peaks centred at around 550°C. The digestate sample obtained on day 33 of stabilisation from the thermophilic reactor presented a peak of particularly high intensity associated with these stable molecules.…”

Section: Thermal Analysissupporting

confidence: 60%

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

et al. 2010

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Digestion of cattle manure collected from a livestock farm together with bedding material (straw) has been studied under mesophilic and thermophilic conditions in batch reactors. The digestion was carried out for a prolonged period with the aim of evaluating the changes undergone by the organic matter. The mesophilic digestion carried out revealed a greater capacity to produce gas and transform organic matter, while a higher conversion rate, but a lower gas yield, was obtained under thermophilic conditions. Degradation of the organic matter was evaluated by means of thermal analysis and (1)H NMR. Stabilisation through anaerobic digestion (either mesophilic or thermophilic) resulted in an increase in the quality of the organic matter, as characterised by an enrichment in thermostable compounds, and an accumulation of long chain aliphatic materials. The experiments performed demonstrated the transformation of organic matter into complex materials under anaerobic conditions with an accumulation of aliphatic components under both types of conditions tested. Degradation through mesophilic digestion, in comparison to the thermophilic process, resulted in a greater destruction of straw particles.

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Section: Thermal Analysissupporting

confidence: 60%

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

et al. 2010

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“…In this study, Fourier transform infrared spectroscopy (FTIR) analysis was carried out to investigate the group functional of the AnMBR sludge, concentrate, fouling layers, and fouled and cleaned membranes, and data are shown in Figure S2a,b,c. The Figure S2a, the peak at 2500-3700 cm −1 is suggested to represent the stretching of the O−H bond [54] and 1413 cm −1 (C−N stretch) may indicate the secondary and tertiary amines. Figure S2b spectra exhibits absorption band around 1052 cm −1 , which can be assigned to the C−O stretching of polysaccharides or polysaccharide-like substances [55] and 1157 cm −1 band suggested to be assigned to C−O bond of ethers or carboxylic acid [53].…”

Section: Ftir Analysismentioning

confidence: 99%

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

Vincent

Tong

et al. 2018

Processes

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A lab-scale of a side stream anaerobic membrane bioreactor (AnMBR) equipped with a tubular membrane operated at the mesophilic temperature of 37.0 ± 1.2 • C for treating domestic wastewater was tested to investigate its performance and fouling characteristics at two organic loading rates (OLR) of 0.25 kg COD m −3 d −1 , and 0.70 kg COD m −3 d −1 , respectively. The AnMBR was operated for 600 days at sludge retention time (SRT) of 100 days. This AnMBR exhibits excellent chemical oxygen demand (COD) removal of 91% at 0.25 kg COD m −3 d −1 , and 94% at 0.7 kg COD m −3 d −1 respectively, with effluent-soluble COD below 50 mg/L. Chemically-enhanced cleaning method using NaOH, NaOCl, and citric acid solution were introduced for fouling investigation at these two stages. The results showed that sequential chemical cleaning of alkaline and acid were most effective to recover the membrane flux. The alkaline cleaning was effective at removing organic foulants, while citric acid cleaning was effective at removing the scalants. The analyses of the excitation emission matrix, gel permeation chromatography, and extracellular polymeric substances indicated that major components of membrane foulants were proteins, carbohydrates, humic, and fulvic acids. At 0.25 kg COD m −3 d −1 , organic fouling was more prone to be trapped in the cake layers and responsible for membrane pore blockage, inorganic fouling exhibited marginal contribution to the membrane fouling behavior. However, at 0.70 kg COD m −3 d −1 , high concentrations of organic and inorganic foulants supported an essential role of organic and inorganic fouling on membrane fouling behavior.Processes 2018, 6, 50 2 of 17 is a challenge in many parts of the world for domestic wastewater treatment. The application of anaerobic conventional technologies, such as up-flow anaerobic sludge blanket (UASB), expanded granular sludge blanket (EGSB), and strengthened circulation anaerobic (SCA) for low-strength domestic wastewater, have shown poor quality of effluent as a result of biomass loss [5,6]. The anaerobic digestion normally operates at mesophilic temperatures due to low biomass growth rate and the reduction of substrate utilization at low operational temperatures [7,8]. Conventional anaerobic technology has been the driving tool to deal with wastewater produced in different parts of the world [9,10]. However, this conventional anaerobic technology has been limited to meet society's needs.The anaerobic membrane bioreactor (AnMBR) technology appeared to be the suitable emerging technology. AnMBR has gained in popularity for the treatment of both low-and high-strength wastewater [11] as membrane costs have dropped drastically [12]. This is largely because AnMBR has the ability to provide superior effluent quality for reuse [13], has a small footprint of operation [14], and nutrient recovery compared to conventional anaerobic treatment facility that relies on gravity sedimentation. The AnMBR process proved to be a reliable technology in tourist areas and public places for wastewat...

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“…Assignment of bands was based on a longestablished bibliography (Cuetos et al 2010;Wu et al 2011). Spectra of samples retrieved after 0 weeks (T0), 4 weeks (T4), and 12 weeks (T12) are illustrated in figure 3.…”

Section: Ftir Spectramentioning

confidence: 99%

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

Provenzano

Carella

Malerba

2015

Compost Science & Utilization

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In this article composting of 40% Posidonia oceanica, 20% ligno-cellulosic residues, and 40% sewage sludge was monitored by retrieving samples every 2 weeks from the composting pile and by characterizing them both by chemical and spectroscopic analysis in Fourier transform infrared spectroscopy and fluorescence spectroscopy in the emission mode and as EEM spectra. Chemical data indicated the occurrence of extended mineralization and stabilization during the process. The decreasing trend of E 4 /E 6 ratios suggested a progressive humification of the substrate. Ratios of peaks of aliphatics to aromatics as a function of composting time showed a decreasing trend due to consumption of aliphatic structures and increase of aromatics during the process. The trend of fluorescence intensity observed on emission spectra showed an increase up until 6 weeks and then a decrease until the end of the process, as a consequence of the decomposition process, which broke down organic macromolecules contained in the fresh substrate followed by the humification process. EEM spectra of all samples produced a peak D in the range 345-355 ex /437-446 em . Samples retrieved at the beginning of the process showed, in addition, a peak B at 280 ex /344 em whose disappearance during the process was consistent with bio-degradation of organic matter. Samples retrieved at the beginning and after 2, 4, 6, 8, 10, and 12 weeks exhibited also a peak C at 255 ex /440 em whose fluorescence intensity trend suggested a progressive humification of the substrates.Correspondence to:

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Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

Cited by 48 publications

References 62 publications

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

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