Production of acetic acid from thermally treated sewage sludge in an upflow anaerobic reactor

Badawi, M. A.; El-Shinnawi, M.M.; Blanc, Frederic C.; Wise, Donald L.; El-Shimi, S.A.

doi:10.1016/0921-3449(92)90017-v

Cited by 8 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The availability of inexpensive sources of organic acids, such as acetic acid, is a prerequisite for the application of organic calcium salts as agents of sulfur removal in coal combustion and in coal gasification. The cost of acetic acid and of other organic acids obtained from petrochemical sources is not low, but acetic acid suitable for the use in acetate production can be obtained from the fermentation of low-quality or negative-value waste products, such as sewage sludge . A much less expensive source of organic acids for the production of organic salts of calcium is provided by bio-oil, the product of the flash (fast) pyrolysis of biomass. , In general, bio-oil consists of water (10−20%), a mixture of carboxylic acids, several aldehydes and alcohols, and pyrolytic lignin.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Decomposition and Calcination of Calcium-Enriched Bio-Oil

Sotirchos

Smith

2003

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The subject of this study is the experimental investigation of the decomposition of calciumenriched bio-oil (CEB), the product of the reaction of bio-oil with calcium hydroxide, at high temperatures and of the calcination of the CaCO 3 material that is obtained when the decomposition is carried out in the presence of CO 2 . Decomposition and calcination experiments are conducted in a thermogravimetric analysis system, and the pore structures of dried, decomposed, and calcined samples are characterized using nitrogen adsorption-desorption, mercury intrusion-extrusion, and photomicrographic examination. The calcination results for CEB-derived CaCO 3 are compared with those for two naturally occurring calcitic solids of high CaCO 3 content. The pore structure characterization results show that the decomposition and calcination products of CEB have very high porosities, higher than 80-90%. Because of its high porosity, the calcination product exhibits a much higher calcination rate than particles of limestones and calcites with a characteristic size similar to that of the CEB layer. This indicates that calcium-enriched bio-oil might perform as a more efficient sorbent than limestones for SO 2 capture in fossil fuel combustors.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Decomposition and Calcination of Calcium-Enriched Bio-Oil

Sotirchos

Smith

2003

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…High performance in solids decomposition and COD removal was demonstrated (Nagano et al, 1992). A process combining the thermal treatment (121°C in 0.1 N Ca( OH h) of partially digested sewage sludge and subsequent fermentation of the soluble material in an up-flow, packed-bed anaerobic reactor was described (Badawi et al, 1992). Conversion of the treated sewage sludge to VFAs ranged between 80 and 90% of the theoretical bioconversion based on the amount of COD reduced (40 to 62%).…”

Section: New Processes Process Modificanons and Applicanonsmentioning

confidence: 99%

Anaerobic processes

Pavlostathis¹

1994

Water Environment Research

View full text Add to dashboard Cite

“…In this work, the bulk and surface structural properties of single- and bi-metal-doped g-C 3 N 4 powders, synthesized by a facile method, were elucidated using complementary techniques with the aim to explore relationships between these and the photoactivity of these materials for the degradation of acetic acid. Acetic acid emissions contribute negatively to global warming ( Budsberg et al, 2020 ), and this chemical is a typical degradation product from wastewater remediation ( Badawi et al, 1992 ). While this acid is of low toxicity, it is quite stable, being oxidation-resistant under ambient conditions ( Li et al, 1991 ).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Metal-Doped Graphitic Carbon Nitride on Photocatalytic Conversion of Acetic Acid to Carbon Dioxide

et al. 2022

View full text Add to dashboard Cite

Metal-doped graphitic carbon nitride (MCN) materials have shown great promise as effective photocatalysts for the conversion of acetic acid to carbon dioxide under UV–visible irradiation and are superior to pristine carbon nitride (g-C3N4, CN). In this study, the effects of metal dopants on the physicochemical properties of metal-doped CN samples (Fe-, Cu-, Zn-, FeCu-, FeZn-, and CuZn-doped CN) and their catalytic activity in the photooxidation of acetic acid were investigated and discussed for their correlation, especially on their surface and bulk structures. The materials in the order of highest to lowest photocatalytic activity are FeZn_CN, FeCu_CN, Fe_CN, and Cu_CN (rates of CO2 evolution higher than for CN), followed by Zn_CN, CuZn_CN, and CN (rates of CO2 evolution lower than CN). Although Fe doping resulted in the extension of the light absorption range, incorporation of metals did not significantly alter the crystalline phase, morphology, and specific surface area of the CN materials. However, the extension of light absorption into the visible region on Fe doping did not provide a suitable explanation for the increase in photocatalytic efficiency. To further understand this issue, the materials were analyzed using two complementary techniques, reversed double-beam photoacoustic spectroscopy (RDB-PAS) and electron spin resonance spectroscopy (ESR). The FeZn_CN, with the highest electron trap density between 2.95 and 3.00 eV, afforded the highest rate of CO2 evolution from acetic acid photodecomposition. All Fe-incorporated CN materials and Cu-CN reported herein can be categorized as high activity catalysts according to the rates of CO2 evolution obtained, higher than 0.15 μmol/min−1, or >1.5 times higher than that of pristine CN. Results from this research are suggestive of a correlation between the rate of CO2 evolution via photocatalytic oxidation of acetic acid with the threshold number of free unpaired electrons in CN-based materials and high electron trap density (between 2.95 and 3.00 eV).

show abstract

Production of acetic acid from thermally treated sewage sludge in an upflow anaerobic reactor

Cited by 8 publications

References 1 publication

Experimental Investigation of the Decomposition and Calcination of Calcium-Enriched Bio-Oil

Experimental Investigation of the Decomposition and Calcination of Calcium-Enriched Bio-Oil

Anaerobic processes

The Influence of Metal-Doped Graphitic Carbon Nitride on Photocatalytic Conversion of Acetic Acid to Carbon Dioxide

Contact Info

Product

Resources

About