Performance of leaching bed reactor converting the organic fraction of municipal solid waste to organic acids and alcohols

Investigating two-phase digestion of grass silage for demand-driven biogas applications: Effect of particle size and rumen fluid addition

“…The general trend for pH in all four leaching trials was to initially drop and gradually increase over the 30 day trial period. Similar results were evident in studies investigating the hydrolysis of the organic fraction of municipal solid waste in LBRs [24]. In the trials with no rumen fluid addition, the pH seemed to self-buffer more effectively.…”

“…This was previously reported for leaching trials of food waste [21]. It has also been suggested that the pH can vary during the acidogenesis phase, and with no pH control, the system can subsequently self-buffer towards a higher pH range [24,25]. The optimum range of pH reported for acidogenic bacteria is 4.0e6.5 [26,27].…”

PHA production from the organic fraction of municipal solid waste (OFMSW): Overcoming the inhibitory matrix

“…Lately, the resource recovery approach is mainly implemented, coupling waste management with production of energy or chemicals. Leaching is usually adopted for the treatment of organic waste since it efficiently converts the waste into volatile fatty acids (VFA) which can be subsequently used for biogas production (Chugh et al, 1999, Doǧan et al, 2009. However, energy (in terms of biogas) is a low value product, whereas -from a sustainability point of view-production of chemicals would be more propitious.…”

Physicochemical changes of rice straw after lime pretreatment and mesophilic dry digestion

“…The leaching bed reactor (LBR) system has shown some promise as a method for dry digestion of organic wastes [5], and it has been used widely for anaerobic digestion of various organic matters, including municipal solid waste [5], manure [6] and agricultural residues [2,7e10]. In those studies, the performance of dry digestion of various biomasses was investigated; however, few studies have focused on the changes in physicochemical characteristics of digested matter.…”