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Bruce C Anderson - One of the best experts on this subject based on the ideXlab platform.
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enhanced biogas production from anaerobic co digestion of municipal wastewater treatment sludge and fat oil and grease fog by a modified two stage thermophilic digester system with selected thermo Chemical pre treatment
Renewable Energy, 2015Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Anaerobic co-digestions with fat, oil and grease (FOG) were investigated in two-stage thermophilic (55 °C) semi-continuous flow co-digestion systems. One two-stage co-digestion system (System I) was modified to incorporate a thermo-Chemical Pre-Treatment of pH = 10 at 55 °C, which was the best Pre-Treatment condition for FOG co-digestion identified during laboratory-scale bioChemical methane potential (BMP) testing. The other two-stage co-digestion system (System II) was operated without a Pre-Treatment process. The anaerobic digester of each digestion system had a hydraulic retention time (HRT) of 24 days. An organic loading rate (OLR) of 1.83 ± 0.09 g TVS/L·d was applied to each digestion system. It was found that System I effectively enhanced biogas production as the thermo-Chemical Pre-Treatment improved the substrate hydrolysis including increased COD solubilization and VFA concentrations. Overall, the modified System I yielded a 25.14 ± 2.14 L/d biogas production rate, which was substantially higher than the 18.73 ± 1.11 L/d obtained in the System II.
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effects of ultrasonic and thermo Chemical pre treatments on methane production from fat oil and grease fog and synthetic kitchen waste kw in anaerobic co digestion
Bioresource Technology, 2013Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Abstract The effects of ultrasonic and thermo-Chemical Pre-Treatments on the methane production potential of anaerobic co-digestion with synthetic kitchen waste (KW) or fat, oil and grease (FOG) were investigated. Non-linear regressions were fitted to accurately assess and compare the methane production from co-digestion under the various Pre-Treatment conditions and to achieve representative simulations and predictions. Ultrasonic Pre-Treatment was not found to improve methane production effectively from either FOG co-digestion or KW co-digestions. Thermo-Chemical Pre-Treatment could increase methane production yields from both FOG and KW co-digestions. COD solubilization was found to effectively represent the effects of Pre-Treatment. A comprehensive evaluation indicated that the thermo-Chemical Pre-Treatments of pH = 10, 55 °C and pH = 8, 55 °C provided the best conditions to increase methane production from FOG and KW co-digestions, respectively. The most effective enhancement of biogas production (288 ± 0.85 mL CH4/g TVS) was achieved from thermo-Chemically pre-treated FOG co-digestion, which was 9.9 ± 1.5% higher than FOG co-digestion without thermo-Chemical Pre-Treatment.
Chenxi Li - One of the best experts on this subject based on the ideXlab platform.
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enhanced biogas production from anaerobic co digestion of municipal wastewater treatment sludge and fat oil and grease fog by a modified two stage thermophilic digester system with selected thermo Chemical pre treatment
Renewable Energy, 2015Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Anaerobic co-digestions with fat, oil and grease (FOG) were investigated in two-stage thermophilic (55 °C) semi-continuous flow co-digestion systems. One two-stage co-digestion system (System I) was modified to incorporate a thermo-Chemical Pre-Treatment of pH = 10 at 55 °C, which was the best Pre-Treatment condition for FOG co-digestion identified during laboratory-scale bioChemical methane potential (BMP) testing. The other two-stage co-digestion system (System II) was operated without a Pre-Treatment process. The anaerobic digester of each digestion system had a hydraulic retention time (HRT) of 24 days. An organic loading rate (OLR) of 1.83 ± 0.09 g TVS/L·d was applied to each digestion system. It was found that System I effectively enhanced biogas production as the thermo-Chemical Pre-Treatment improved the substrate hydrolysis including increased COD solubilization and VFA concentrations. Overall, the modified System I yielded a 25.14 ± 2.14 L/d biogas production rate, which was substantially higher than the 18.73 ± 1.11 L/d obtained in the System II.
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effects of ultrasonic and thermo Chemical pre treatments on methane production from fat oil and grease fog and synthetic kitchen waste kw in anaerobic co digestion
Bioresource Technology, 2013Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Abstract The effects of ultrasonic and thermo-Chemical Pre-Treatments on the methane production potential of anaerobic co-digestion with synthetic kitchen waste (KW) or fat, oil and grease (FOG) were investigated. Non-linear regressions were fitted to accurately assess and compare the methane production from co-digestion under the various Pre-Treatment conditions and to achieve representative simulations and predictions. Ultrasonic Pre-Treatment was not found to improve methane production effectively from either FOG co-digestion or KW co-digestions. Thermo-Chemical Pre-Treatment could increase methane production yields from both FOG and KW co-digestions. COD solubilization was found to effectively represent the effects of Pre-Treatment. A comprehensive evaluation indicated that the thermo-Chemical Pre-Treatments of pH = 10, 55 °C and pH = 8, 55 °C provided the best conditions to increase methane production from FOG and KW co-digestions, respectively. The most effective enhancement of biogas production (288 ± 0.85 mL CH4/g TVS) was achieved from thermo-Chemically pre-treated FOG co-digestion, which was 9.9 ± 1.5% higher than FOG co-digestion without thermo-Chemical Pre-Treatment.
J B Van Lier - One of the best experts on this subject based on the ideXlab platform.
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effects of thermo Chemical pre treatment on anaerobic biodegradability and hydrolysis of lignocellulosic biomass
Bioresource Technology, 2009Co-Authors: Tânia V Fernandes, G Zeeman, Johan P M Sanders, J B Van LierAbstract:The effects of different thermo-Chemical Pre-Treatment methods were determined on the biodegradability and hydrolysis rate of lignocellulosic biomass. Three plant species, hay, straw and bracken were thermo-Chemically pre-treated with calcium hydroxide, ammonium carbonate and maleic acid. After Pre-Treatment, the plant material was anaerobically digested in batch bottles under mesophilic conditions for 40 days. From the Pre-Treatment and subsequent anaerobic digestion experiments, it was concluded that when the lignin content of the plant material is high, thermo-Chemical Pre-Treatments have a positive effect on the biodegradability of the substrate. Calcium hydroxide Pre-Treatment improves the biodegradability of lignocellulosic biomass, especially for high lignin content substrates, like bracken. Maleic acid generates the highest percentage of dissolved COD during Pre-Treatment. Ammonium Pre-Treatment only showed a clear effect on biodegradability for straw.
Dumitru Baleanu - One of the best experts on this subject based on the ideXlab platform.
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continuous wavelet transforms for simultaneous spectral determination of trimethoprim and sulphamethoxazole in tablets
Journal of The Iranian Chemical Society, 2011Co-Authors: Erdal Dinc, Yucel Kadioglu, Fatma Demirkaya, Dumitru BaleanuAbstract:A new signal processing approach was developed to improve the simultaneous spectrophotometric determination of trimethoprim (TMP) and sulphamethoxazole (SMX) in their binary mixtures without using any Chemical Pre-Treatment. This approach was essentially based on the continuous wavelet transform (CWT) of the absorption spectra of the target compounds and their samples. A set of continuous wavelet transforms was applied. Biorthogonal with 2.4 order (BIOR2.4), Coiflets with 2 order (COIF2), Daubechies with 3 order (DB3) and Haar (HAAR) were found to be suitable for the quantitative resolution of the twocomponent mixture containing TMP and SMX compounds. The confirmation of the determination results obtained by applying the BIOR2.4, COIF2, DB3 and HAAR wavelet families was achieved by first derivative spectrophotometry (DS1) analysis of the same mixtures. The validation of the above-mentioned signal processing methods was tested by analyzing various binary mixtures of the related compounds, and by using the standard addition technique. The simultaneous determination of TMP and SMX in commercial tablets was assessed by using the proposed signal processing tools.
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comparative study of the continuous wavelet transform derivative and partial least squares methods applied to the overlapping spectra for the simultaneous quantitative resolution of ascorbic acid and acetylsalicylic acid in effervescent tablets
Journal of Pharmaceutical and Biomedical Analysis, 2005Co-Authors: Erdal Dinc, Abdil Ozdemir, Dumitru BaleanuAbstract:The simultaneous spectrophotometric determination of ascorbic acid (AA) and acetylsalicylic acid (ASA) in effervescent tablets in the presence of the overlapping spectra was accomplished by the continuous wavelet transform (CWT), derivative spectrophotometry (DS) and partial least squares (PLS) approaches without using any Chemical Pre-Treatment. CWT and DS calibration equations for AA and ASA were obtained by measuring the CWT and DS amplitudes corresponding to zero-crossing points of spectra obtained by plotting continuous wavelet coefficients and first-derivative absorbance values versus the wavelengths, respectively. The PLS calibration was constructed by using the concentration set and its full absorbance data consisting of 850 points from 220 to 305 nm in the range of 210-310 nm. These three methods were tested by analyzing the synthetic mixtures of the above drugs and they were applied to the real samples containing two commercial pharmaceutical preparations of subjected drugs. A comparative study was carried out by using the experimental results obtained from three analytical methodologies and precise and accurate results were obtained.
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multidetermination of thiamine hcl and pyridoxine hcl in their mixture using continuous daubechies and biorthogonal wavelet analysis
Talanta, 2003Co-Authors: Erdal Dinc, Dumitru BaleanuAbstract:Abstract A new graphical method based on the one-dimensional wavelet transform (WT) was proposed and tested on mixture of thiamine hydrochloride (THI) and pyridoxine hydrochloride (PYR) in the presence of strongly overlapping signals. We selected from the data of the UV-VIS absorption spectra a signal consisting of 1150 points corresponding to the concentration range 8–32 mg ml−1 for each vitamin and we subjected it to Daubechies8 (DAUB8) and Biorthogonal6.8 (BIOR6.8) wavelet transforms. Since the peaks of the transformed signals were bigger than original ones a zero crossing method was applied to obtain the calibration graphs. In addition, the validity of Beer–Lambert law was assumed for the transformed signals. An appropriate scale setting was choosing to obtain an alternative calibration for each method. Matlab 6.5 software was used for one-dimensional wavelet analysis and the basic concepts about wavelet method were given. The obtained results were successfully compared among each other as well as with those obtained by other literature methods. The method developed in this paper is rapid, easy to apply, not expensive and it is suitable for analyzing of the overlapping signals of compounds in their mixtures without any Chemical Pre-Treatment.
Pascale Champagne - One of the best experts on this subject based on the ideXlab platform.
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enhanced biogas production from anaerobic co digestion of municipal wastewater treatment sludge and fat oil and grease fog by a modified two stage thermophilic digester system with selected thermo Chemical pre treatment
Renewable Energy, 2015Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Anaerobic co-digestions with fat, oil and grease (FOG) were investigated in two-stage thermophilic (55 °C) semi-continuous flow co-digestion systems. One two-stage co-digestion system (System I) was modified to incorporate a thermo-Chemical Pre-Treatment of pH = 10 at 55 °C, which was the best Pre-Treatment condition for FOG co-digestion identified during laboratory-scale bioChemical methane potential (BMP) testing. The other two-stage co-digestion system (System II) was operated without a Pre-Treatment process. The anaerobic digester of each digestion system had a hydraulic retention time (HRT) of 24 days. An organic loading rate (OLR) of 1.83 ± 0.09 g TVS/L·d was applied to each digestion system. It was found that System I effectively enhanced biogas production as the thermo-Chemical Pre-Treatment improved the substrate hydrolysis including increased COD solubilization and VFA concentrations. Overall, the modified System I yielded a 25.14 ± 2.14 L/d biogas production rate, which was substantially higher than the 18.73 ± 1.11 L/d obtained in the System II.
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effects of ultrasonic and thermo Chemical pre treatments on methane production from fat oil and grease fog and synthetic kitchen waste kw in anaerobic co digestion
Bioresource Technology, 2013Co-Authors: Chenxi Li, Pascale Champagne, Bruce C AndersonAbstract:Abstract The effects of ultrasonic and thermo-Chemical Pre-Treatments on the methane production potential of anaerobic co-digestion with synthetic kitchen waste (KW) or fat, oil and grease (FOG) were investigated. Non-linear regressions were fitted to accurately assess and compare the methane production from co-digestion under the various Pre-Treatment conditions and to achieve representative simulations and predictions. Ultrasonic Pre-Treatment was not found to improve methane production effectively from either FOG co-digestion or KW co-digestions. Thermo-Chemical Pre-Treatment could increase methane production yields from both FOG and KW co-digestions. COD solubilization was found to effectively represent the effects of Pre-Treatment. A comprehensive evaluation indicated that the thermo-Chemical Pre-Treatments of pH = 10, 55 °C and pH = 8, 55 °C provided the best conditions to increase methane production from FOG and KW co-digestions, respectively. The most effective enhancement of biogas production (288 ± 0.85 mL CH4/g TVS) was achieved from thermo-Chemically pre-treated FOG co-digestion, which was 9.9 ± 1.5% higher than FOG co-digestion without thermo-Chemical Pre-Treatment.