Influence of pretreatment and pH on the enhancement of

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Influence of pretreatment and pH on the enhancement of ...

Feb 04, 2020  The purpose of this study was to evaluate the best pretreatment among the three different pretreatment methods used for the inoculums, along with the evaluation of 3 different pH values on the H 2 and VFAs production utilizing food waste. It is evident that in Fig. 1 and Fig. 2, the pretreatments have a significant influence on the H 2 concentration and H 2 yield along with pH values.

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Influence of pretreatment and pH on the enhancement of ...

Influence of pretreatment and pH on the enhancement of hydrogen and volatile fatty acids production from food waste in the semi-continuously running reactor Author links open overlay panel Reham Yasser Farouk a b Leigang Li a Yuanyuan Wang a Yu Li a Sherif Melak c

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Optimization of NaOH pretreatment for enhancement of ...

NaOH Pretreatment Effect. pH variation of samples during the NaOH pretreatment. The pH values of the samples were measured during the NaOH pretreatment and are shown in Fig. 3. For all samples, the pH values actually declined with pretreatment time (Fig. 3a), likely due to the consumption of OH – (Chandra et al. 2012; Zheng et al. 2009 ...

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Effect of pretreatment techniques on food waste ...

10%  May 08, 2015  Alkaline pretreatment. Figure 1 shows the effect of alkaline pretreatment on total biogas, VFA, and sCOD production. Apart from control and the batch pretreated at pH 12, all other experiments showed enhanced production of biogas comprising mostly H 2 (52 %) and CO 2 (47 %) in a short period of time. In batches pretreated at pH 9, 10, and 11, most of the hydrogen

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Ionisation and the effect of absorption enhancers on ...

Purpose: to investigate if salicylic acid (SA)-permeation through excised human skin (HS) and silastic rubber (SR) conforms to the pH-hypothesis and to assess the influence of a range of absorption enhancers on the transport of SA with and without a transmembrane pH-gradient. Methods: Franz cells were used to study SA permeation from solutions and saturated suspensions.

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Optimization of NaOH pretreatment for enhancement of ...

NaOH Pretreatment Effect. pH variation of samples during the NaOH pretreatment. The pH values of the samples were measured during the NaOH pretreatment and are shown in Fig. 3. For all samples, the pH values actually declined with pretreatment time (Fig. 3a), likely due to the consumption of OH – (Chandra et al. 2012; Zheng et al. 2009 ...

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Lignosulfonate and elevated pH can enhance enzymatic ...

Jan 28, 2013  The elevated pH study was conducted with the application of SPORL pretreatment hydrolysate for further enhancement of saccharification efficiency. This work lays the foundation for direct simultaneous enzymatic saccharification and combined fermentation (SSFCombF) of the whole lignocellulosic slurry at high solids loadings without a separation ...

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Effect of pH on inhibition and enhancement of luminol-H2O2 ...

The effect of pH on inhibition and enhancement of luminol-H2O2-Co2+ chemiluminescence (CL) by 18 phenolic compounds and 20 amino acids was studied. It was found that most of the tested compounds showed an inhibiting effect at lower pH and an enhancing effect at higher pH. At a midrange pH

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Effect of pretreatment techniques on food waste ...

May 08, 2015  Alkaline pretreatment. Figure 1 shows the effect of alkaline pretreatment on total biogas, VFA, and sCOD production. Apart from control and the batch pretreated at pH 12, all other experiments showed enhanced production of biogas comprising mostly H 2 (52 %) and CO 2 (47 %) in a short period of time. In batches pretreated at pH 9, 10, and 11, most of the hydrogen was generated

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Polymers Free Full-Text Effect of Pre-Corrected pH on ...

The content of PCs decreased by 33.78% during pre-corrected pH hydrothermal pretreatment (pH 4.0) compared to that during traditional hydrothermal pretreatment (pH 3.5). Thus, the dissolution and degradation of lignin was maximally inhibited, while hemicellulose was heavily extracted at pH 4.0 by 170 °C pre-corrected pH hydrothermal pretreatment.

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The Impact of Electron Beam Pretreatment on the ...

However, since pretreatment must be vigorous, many options create by-products which may be inhibitory to fermentation and/or saccharification. The effect of high energy electron beam (EB) pretreatment has been studied by many groups, and EB pretreatment has repeatedly been shown to enhance the rate and yield of glucose

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Effect of alkaline microwaving pretreatment on anaerobic ...

May 10, 2017  The main objective of this study was to evaluate the effect of pH and energy input on swine manure pretreatment and the effects of pH and AN

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(PDF) Enhancement of biogas production by pretreatment: A ...

Tel: (+91) 8089839561, E-mail: [email protected] Abstract: This paper presents the review of different pretreatment techniques that are used to enhance the biogas. production by anaerobic ...

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Biomass Pretreatment for Enhancement of Biogas Production ...

Jan 18, 2019  This chapter concludes the effect of various biomass pretreatment for enhancement of biogas production and the future challenges for an energy efficient and eco-friendly manner. Therefore, optimizing the pretreatment conditions in order to lower production costs, improving the process performance and production of fewer residues is needed.

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Process optimization and effect of thermal, alkaline, H2O2 ...

May 06, 2020  According to Fig. 2, COD solubility is predicted to increase up to 32% in combined pretreatment of 60 mg H 2 O 2 /g TS, 90 °C, and pH = 12, while the highest solubility enhancement from experimental results was 30.4% (19th test).

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Long‐term effect of inoculum pretreatment on fermentative ...

Mar 04, 2011  Methanogenic activity could be inhibited at pH lower than 6, both under mesophilic and thermophilic conditions, while homoacetogenic activity could only be inhibited under thermophilic condition at initial pH 5.5. Microbial community analysis showed that pretreatment did not affect the dominant bacteria.

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(PDF) Enhancement in mesophilic aerobic digestion of waste ...

Enhancement in mesophilic aerobic digestion of waste activated sludge by chemically assisted thermal pretreatment method. Bioresource Technology, 2012. Shang-lien Lo. Download PDF. Download Full PDF Package. This paper. A short summary of this paper.

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ENHANCEMENT OF ANAEROBIC DIGESTION OF SOLID

ENHANCEMENT OF ANAEROBIC DIGESTION OF SOLID WASTES BY PRE-TREATMENT AND POST-TREATMENT By Wei Liu May 2008 Chair: Pratap C. Pullammanappallil Cochair: Arthur A. Teixeira Major: Agricultural and Biological Engineering This study reports on the development of methods for pretreatment of feedstock and post

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Lignosulfonate and elevated pH can enhance enzymatic ...

Jan 28, 2013  The elevated pH study was conducted with the application of SPORL pretreatment hydrolysate for further enhancement of saccharification efficiency. This work lays the foundation for direct simultaneous enzymatic saccharification and combined fermentation (SSFCombF) of the whole lignocellulosic slurry at high solids loadings without a separation ...

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Impact of Alkaline Pretreatment to Enhance Volatile Fatty ...

The Effect of Pretreatment on pH during Anaerobic VFAs Production. Figure 8 shows the changes in pH during the anaerobic hydrolysis of rice husk. For sample 1# (untreated), the pH first falls quickly, reaching its lowest point within 3 d. This was followed by a

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Effect of alkaline microwaving pretreatment on anaerobic ...

May 10, 2017  The main objective of this study was to evaluate the effect of pH and energy input on swine manure pretreatment and the effects of pH and AN

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Enhancement of Delignification by Ionic Liquids ...

Enhancement of Delignification by Ionic Liquids ... dosage, pH value in the range 2 to 3, 70 °C for 30 min in chlorine dioxide stage (D), 12 kg/t pulp of H 2 O 2 dosage, 5 wt.% of NaOH dosage for adjusting pH ... Effect of ILs Pretreatment on the Chemical Compositions and the

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Pretreatment of wheat straw leads to structural changes ...

Jan 22, 2018  NaOH pretreatment results in slight degradation of hemicellulose compared to that using H 2 SO 4 pretreatment (121 °C, 13.1%, and 11.1%, respectively), whereas the

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Overcoming Assay Inhibition or Enhancement

enhancement test. Adjust the pH with Tris Buffer The LAL assay functions best in the 6.0 to 8.0 pH range. If a product is outside that pH range, pH adjustment may be necessary. Lonza LAL is buffered, so simple dilution of products in LAL Reagent Water may be sufficient to render the product testable. Adjusting the pH of an unbuffered

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(PDF) Enhancement of enzymatic hydrolysis of corncob by ...

Enhancement of enzymatic hydrolysis of corncob by microwave-assisted alkali pretreatment and its effect in morphology. 12 Pages. Enhancement of enzymatic hydrolysis of corncob by microwave-assisted alkali pretreatment and its effect in morphology. Cellulose, 2013. Sujitra Wongkasemjit.

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Long‐term effect of inoculum pretreatment on fermentative ...

Mar 04, 2011  Methanogenic activity could be inhibited at pH lower than 6, both under mesophilic and thermophilic conditions, while homoacetogenic activity could only be inhibited under thermophilic condition at initial pH 5.5. Microbial community analysis showed that pretreatment did not affect the dominant bacteria.

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(PDF) Enhancement in mesophilic aerobic digestion of waste ...

Enhancement in mesophilic aerobic digestion of waste activated sludge by chemically assisted thermal pretreatment method. Bioresource Technology, 2012. Shang-lien Lo. Download PDF. Download Full PDF Package. This paper. A short summary of this paper.

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Field-effect sensors – from pH sensing to biosensing ...

Field-effect sensors – from pH sensing to biosensing: sensitivity enhancement using streptavidin–biotin as a model system B. M. Lowe, K. Sun, I. Zeimpekis, C. Skylaris and N. G. Green, Analyst, 2017, 142, 4173 DOI: 10.1039/C7AN00455A This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

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Pretreatment methods of lignocellulosic biomass for ...

Mar 28, 2017  Steam explosion. Steam explosion (SE) is a well-known technique for the pretreatment of various biomass feedstocks. During SE pretreatment, lignocellulosic material is exposed to a high-pressure saturated steam at a temperature of 160–260 °C

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The effect of NaOH pretreatment on coal structure and ...

Apr 15, 2020  Effect of NaOH pretreatment on the microcrystalline structure of coal. The XRD diffraction diagrams of the raw coal and residual coal pretreated with 1.5 M NaOH for 12 h were shown in Fig 4. The coal samples containing graphite-like structures were demonstrated by an obvious (002) peak at ~ 26° and a weak (100) peak at ~ 43°.

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Enhancement of Phosphate Flotation by Ultrasonic

Enhancement of Phosphate Flotation by Ultrasonic Pretreatment Hassani, Fatemeh; Noaparast, Mohammad*+; Shafaei Tonkaboni, Sied Ziaedin School of Mining Engineering, College of Engineering, University of Tehran, Tehran 1439957131, I.R. IRAN ABSTRACT: Removal of carbonate impurities in sedimentary phosphate is one of the most

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Discussion on the thermal conductivity enhancement of ...

Feb 09, 2011  When pH value is above 8.0, there is no obvious relationship between pH value and the thermal conductivity enhancement. In our opinion, the influence of pH value on thermal conductivity is that pH value has a direct effect on the stability of nanofluids.

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