Bio-hydrogen and bio-methane potentials of skim latex serum in batch thermophilic two-stage anaerobic digestion

Anaerobic digestion of skim latex serum (SLS) for hydrogen and methane production using a two-stage process in a series of up-flow anaerobic sludge blanket (UASB) reactor

“…In addition, since containing significant amount of nutrients for microorganisms growth in a form of non-rubber matters, including proteins, carbohydrates, sugars, and organic and inorganic salts, SLS could therefore possibly be converted to hydrogen and methane by anaerobic microorganisms by applying this mentioned two-stage process. In previous batch experiments of thermophilic two-stage anaerobic digestion process, satisfactory results of bio-hydrogen and bio-methane yields of 1.57 ± 0.06 L-H 2 /L-SLS and 12.20 ± 0.31 L-CH 4 /L-SLS were achieved, respectively by using initial SLS concentration of 22.8 g-VS/L [9]. Under thermophilic conditions, thermophiles having more thermodynamic favorability than mesophiles could increase chemical and biological reaction rates [10].…”

Effect of fermentation temperature on hydrogen production from xylose and the succession of hydrogen‐producing microflora

“…Some species affiliated with Thermoanaerobacterium sp. were reported to be found in a thermophilic hydrogen fermentation reactor, with butyric fermentation as the predominant metabolic pathway . A microorganism closely related to Clostridium thermopalmarium was also present at 45–60°C (Band 14), with the ability to ferment cellulose .…”

“…were reported to be found in a thermophilic hydrogen fermentation reactor, with butyric fermentation as the predominant metabolic pathway. 34 microorganism closely related to Clostridium thermopalmarium was also present at 45-60 ∘ C (Band 14), with the ability to ferment cellulose. 36 However, bands 13 and 15, only observed at 55 and 60 ∘ C, showed 99% identity to Thermoanaerobacterium thermosaccharolyticum, a kind of thermophilic spore-forming bacteria.…”

Optimization of process parameters for production of volatile fatty acid, biohydrogen and methane from anaerobic digestion

“…Although Table 3 lists the optimum values of OLR for different type of substrates and reactor configurations. Table 3 From the table it is clear that the limitation in organic loading rate could be avoided in the two-stage anaerobic processes as it eliminates the possible inhibition of methanogenesis by acidification (Intanoo et al, 2014;Jariyaboon et al, 2015;Zhong et al, 2015). In this connection, a study aimed for simultaneous production of hydrogen and methane from palm oil mill effluent using two-stage thermophilic and mesophilic fermentation (Krishnan et al, 2016).…”