Pretreatment methods to improve sludge anaerobic degradability: A review

Anaerobic digested sludge: a new supplementary nutrient source for ethanol production

“…At high temperatures, carbohydrates and released amino acids get involved into maillard reactions leading to the formation of melanoidine, which are extremely recalcitrant compounds (Carrère et al 2010). The thermal treatment done in this study might have resulted in toxic compounds formation and the reduction of ethanol yield consequently.…”

Optimization and Performance of Moderate Combined Alkali and Microwave Pretreatment for Anaerobic Digestion of Waste-Activated Sludge

“…The samples were filtered through 0.45 µm filter before SCOD determination. Biogas yield was measured by the gas-collecting method of drainage-saturated NaHCO 3 . Methane concentration was analyzed by gas chromatography with a thermal conductivity detector and a TDX-01 packed column, using H 2 as the carrier gas.…”

“…Some reviews have summarized and compared different kinds of mechanical, thermal, chemical, and biological treatment methods [3,5,7]. The low-impact pretreatment methods such as mechanical or biological generally increase speed of degradation, while high-impact methods such as thermal hydrolysis or oxidation are likely to improve both speed and degree of degradation [3].…”

Recent Achievements in the Production of Biogas from Microalgae

“…However, under 59 thermophilic conditions there is a higher activity of extracellular enzymes responsible for 60 the hydrolysis of organic compounds, which may enhance the reaction rate and/or 61 biodegradability of the substrate. compounds [1], and to lignocellulosic biomass to disintegrate macromolecules in vegetable 68 cell walls and release intracellular compounds [2]. They have also been tested on 69 microalgae [3].…”

“…Note: 1 Results expressed as methane production rate; 2 Not presented; 3 Refers to waste activated sludge. Table 4.…”