Application of biomass-derived hydrochar in process stability of anaerobic digestion

Process Performance of Thermophilic Anaerobic Co-Digestion of Municipal Sewage Sludge and Orange Peel

“…It is worth mentioning that in all series, the ALK content in digestate was established at high level providing in this way a sufficient buffering capacity within AD. Importantly, in all reactors, the VFA/ALK ratio was at a low level below 0.2-0.3, indicating stable process performance (Ayodele et al, 2022). However, an increase of this ratio was observed in OP presence.…”

Investigating the Enhancement in Biogas Production by Hydrothermal Carbonization of Organic Solid Waste and Digestate in an Inter-Stage Treatment Configuration

“…It is a thermo-chemical process that can convert organic feedstocks with high-moisture content into a slurry consisting of a carbonaceous product, called hydrochar, and a liquid (HTCL) with a high load of organic and inorganic compounds. Hydrochar is characterized by higher carbon content and lower hydrogen and oxygen to carbon ratios than the initial substrate [17,18], with surface functionalization patterns that permit hydrochar utilization in numerous end-use applications [19], such as solid fuel [17], microbial carriers in soil [20] and AD [21], adsorbent for pollutants [22,23], and soil amendment [22]. HTCL is characterized by high concentrations of organic matter, and a promising recovery route is AD [24] or recycling in the activated sludge process [25].…”