Comprehensive evaluation of different strategies to recover methanogenic performance in ammonia-stressed reactors

The role of biochar on alleviating ammonia toxicity in anaerobic digestion of nitrogen-rich wastes: A review

“…Recently, the issue of ammonia inhibition has gradually received attention. Many strategies have been proposed to alleviate ammonia inhibition, including 1) adjustment of temperature or pH turn NH3 into NH4 + , thereby reducing the toxicity of ammonia nitrogen (Karlsson and Ejlertsson, 2012); 2) supplement of methanogenic archaea with high resistance to ammonia nitrogen or acclimation under high ammonia nitrogen concentration (Yan et al, 2021); 3) removal of ammonia nitrogen by converting ammonia nitrogen to N2 by nitrification or denitrification (Kwon et al, 2019); 4) addition of nutrients such as trace elements to enhance the ability of microorganisms to resist high ammonia nitrogen concentration.…”

“…The performance of biochar depends on the properties of biochar, biochar addition ratio, operating conditions (e.g., temperature and pH) of AD, and the total ammonia nitrogen (TAN) concentration. Biochar provides an ideal microenvironment for the growth and survival of microorganisms due to its porous structure (Yan et al, 2021). The addition of biochar can also increase the concentration of microorganisms, thereby improving the resistance of the microbial consortium to the high TAN concentration (Wei et al, 2020).…”

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

“…The reason is that NH 4 + -N is a nitrogen source for microbes, so it could limit the growth and metabolism of microorganisms (Cai et al, 2022). In a study by Yan et al (2021), it was found that woodchip-derived biochar with a higher by Tayibi et al (2021a), in which they land-applied liquid digestate with residue biochar after the AD process on a wheat field. They found that the simultaneous use of liquid digestate with residue biochar could enhance wheat growth up to 67.8 % compared to soil alone.…”

Effects of biochar addition on anaerobic co‐digestion of sewage sludge and swine manure: copper immobilization and digestion performance

“…20 It has been reported that sesame straw biochar adsorbs Pb, Cu, Cr, and Zn and exhibits different adsorption capacities for various metals. 21 In general, several factors, such as pH, 22,23 surface functional groups, [23][24][25] porosity, 26 surface loading 27 and mineral composition, 28 could influence the adsorption capacity of biochar. Additionally, it had been revealed that biochar combined with bacterial aggregates could stimulate microbial activity and alter microbial community-specific selection.…”