A large variety of agro-wastes are actually investigated for their reliability as renewable sources: the possibility to employ some organic residues for the production of biomolecules, biofuels and biomaterials has fostered the born of the concept of second generation biorefineries, which differ from the first generation processes, since non dedicated crops are used as the feedstock. To this ai...

Microbial lipid production from oleaginous yeasts is a promising process for the sustainable development of microbial biodiesel industry. However, feedstock cost poses an economic problem biodiesel. After extraction, yeast biomass can be used as organic source production. In this study, volatile fatty acids (VFAs), produced via anaerobic digestion lipid-extracted (LEY) residue, were utilized ca...

This study was an add-on study to the National Air Emission Monitoring Study (NAEMS). The objective of this study was to measure odor emissions and corresponding concentrations and emissions of target odorous gases. Odor and odorous gas measurements at four NAEMS sites (dairy barns in Wisconsin-WI5B and Indiana-IN5B, swine finisher barn in Indiana-IN3B and swine gestation/farrowing barns in Iow...

The objective of this study was to systematically evaluate and compare the effects of select antimethanogen compounds on methane production, feed digestion and fermentation, and populations of ruminal bacteria and methanogens using in vitro cultures. Seven compounds, including 2-bromoethanesulphonate (BES), propynoic acid (PA), nitroethane (NE), ethyl trans-2-butenoate (ETB), 2-nitroethanol (2N...

Volatile fatty acids (VFAs) have become promising candidates for replacing the conventional expensive carbon sources used to produce polyhydroxyalkanoates (PHAs). Considering inhibitory effect of VFAs at high concentrations and influence VFA mixture composition on bacterial growth PHA production, a thorough investigation different cultivation parameters such as (synthetic waste-derived VFAs) me...

Volatile fatty acids (VFAs) produced by fermentative bacteria can be used instead of high value carbohydrates like glucose to reduce the costs associated mixotrophic microalgal cultivation. This process is however limited a poor assimilation butyrate and low tolerance microalgae VFA concentrations. In this study, 10 strains, isolated from local natural environments or selected culture collectio...

Hydrolysis is the most critical stage in high solids Temperature Phased Anaerobic Digestion (TPAD). In this paper two different Organic Fraction of Municipal Solid Waste (OFMSW) types were tested co-digestion with Digested Sludge (DS) at temperatures: 37, 55 and 65 °C. Volatile fatty acids (VFAs), soluble chemical oxygen demand (CODs) Biochemical Methane Production (BMP) measured calculated aft...

The main objective of wastewater treatment has always been the quality of the final effluent as well as on the efficiency of the treatment process. Nowadays, it was recognized that municipal wastewater has become an attractive source of renewable resources (i.e. cellulose, PHA, phosphorus, nitrogen...) to be efficiently recovered applying the appropriate technologies even in existing wastewater...