Effects of linoleic acid and its degradation by-products on mesophilic hydrogen production using flocculated and granular mixed anaerobic cultures

Energy recovery through biohydrogen production for sustainable anaerobic waste treatment: an overview

“…Nasr et al (2012) reported an 18.5% increase in the energy yield from a two-stage anaerobic digestion process over that from a single-stage process using thin stillage (a by-product of ethanol production process) as substrate. A similar process configuration has also been reported in mesophilic batch reactors (Saady et al, 2012a(Saady et al, , 2012b(Saady et al, , 2012c and resulted in a high H 2 yield of 3.1 mol mol -1 glucose. A similar process configuration has also been reported in mesophilic batch reactors (Saady et al, 2012a(Saady et al, , 2012b(Saady et al, , 2012c and resulted in a high H 2 yield of 3.1 mol mol -1 glucose.…”

“…Similarly, Wu et al (2012) detected Clostridium tyrobutyricum as the major H 2 producing bacteria in a CSTR fed with lactate and acetate. Saady et al (2012aSaady et al ( , 2012bSaady et al ( , 2012c reported a similar finding after investigating different mixed cultures from various sources. Saady et al (2012aSaady et al ( , 2012bSaady et al ( , 2012c reported a similar finding after investigating different mixed cultures from various sources.…”

“…Similarly, almost all the studies published on metabolic flux analysis of mixed culture H 2 dark fermentation have been for pure substrate such as glucose (Chaganti et al, 2011) and some studies with inhibitors to methanogens (Saady et al, 2012b(Saady et al, , 2012c. Similarly, almost all the studies published on metabolic flux analysis of mixed culture H 2 dark fermentation have been for pure substrate such as glucose (Chaganti et al, 2011) and some studies with inhibitors to methanogens (Saady et al, 2012b(Saady et al, , 2012c.…”

“…(Luo et al, 2010;Mohan et al, 2008), freeze-thawing (Mohammadi et al, 2012), repeated-aeration (Ren et al, 2008), and load-shock (Luo et al, 2010;O-Thong et al, 2009). Many of these pretreatments such as treatment with acid and base (BenYi and JunXin, 2009;Luo et al, 2010), BESA , heat-shock (Kotay and Das et al, 2009), repeated-aeration (Ren et al, 2008), combinations of acid, heat and chemicals , and LCFAs (Saady et al, 2012a(Saady et al, , 2012b(Saady et al, , 2012c were reported to be 'the best' in comparison to other methods. The following sections present a review on the effectiveness and deficiencies of specific culture pretreatments concerning H 2 production.…”

“…In batch mixed culture, 2 g l -1 of linoleic (C18:2) and oleic (C18:1) acids increased H 2 yield from glucose fermentation (Saady et al, 2012a(Saady et al, , 2012b(Saady et al, , 2012cRay et al, 2009). They could be obtained from food processing wastewater such as from vegetable oil industry.…”