Biochar utilisation in the anaerobic digestion of food waste for the creation of a circular economy via biogas upgrading and digestate treatment

Granular activated carbon stimulates biogas production in pilot-scale anaerobic digester treating agro-industrial wastewater

“…The average pH in the effluent of the MBR during phase II and III was significantly higher (p-value < 0.0001) in comparison with the pH in the digestate (Table 2, Figure 5). A similar slight increase of pH was also observed in previous work regarding the operation of MBRs for liquid digestate treatment (Lee et al, 2021). The pH increase during the aerobic treatment of the digestate may be correlated with the biodegradation of volatile fatty acids (Mohamed et al, 2008).…”

A robust multicriteria analysis for the post-treatment of digestate from low-tech digesters. Boosting the circular bioeconomy of small-scale farms in Colombia

“…Garfi et al, [14] analyse the potential agricultural reuse of the digestate, remarking the increase in potato yield compared to traditional organic composts. The benefits of using the digestate as a biofertilizer are also highlighted in Lee et al, [35] when applied to the cultivation of kale, lettuce and rocket salad. However, Cucina et al [18] warn about the environmental and health risks of not post-treating the digestate from lowtech digesters working under psychrophilic conditions before soil application.…”

Production of biochar from crop residues and its application for anaerobic digestion

“…Indeed, the CO 2 adsorption capacity of biochar can reach dozens to hundreds of milligrams per gram odd asused biochar (W. Zhao et al, 2021c). However, the difference in the CO 2 adsorption capacity of biochar is found to have much dependence on the biochar physicochemical properties, including the content of functional groups, and aromaticity (Lee et al, 2021). Thus, various modifications Yu et al, 2022) (VFA for short of volatile fatty acids; FAN for short of free ammonia) (W. Zhao et al, 2021c).…”