Decomposition of biogas residues in soil and their effects on microbial growth kinetics and enzyme activities

Effects of anaerobic digestion on soil carbon and nitrogen turnover, N emissions, and soil biological activity. A review

“…In line with these findings, Kautz and Rauber (2007) reported an increase of the dehydrogenase activity, whereas the β-glucosidase activity did not respond to digestate application, indicating that digestate application has no effects to parameters linked to the C inputs, but large influence on parameters linked to nutrient supply. Also, Chen et al (2012) found an increase in soil microbial biomass and a significant promotion of chitinase and leucine amino peptidase activities (related to N-cycle) but no effects of digestate application on three tested enzymes b-glucosidase, cellobiohydrolase (involved in cellulose decomposition), and xylanase (involved in hemicellulose decomposition). The activity of chitinase and leucine amino peptidase is promoted by N-enriched organic components, e.g., peptidoglucan accumulated as microbial residues during the biogas fermentation (Chen et al 2012).…”

“…Also, Chen et al (2012) found an increase in soil microbial biomass and a significant promotion of chitinase and leucine amino peptidase activities (related to N-cycle) but no effects of digestate application on three tested enzymes b-glucosidase, cellobiohydrolase (involved in cellulose decomposition), and xylanase (involved in hemicellulose decomposition). The activity of chitinase and leucine amino peptidase is promoted by N-enriched organic components, e.g., peptidoglucan accumulated as microbial residues during the biogas fermentation (Chen et al 2012). Furthermore, a clear shift in the structure of the microbial community in response to digestate application in comparison to an undigested feedstock was reported (Chen et al 2012;Abubaker et al 2013).…”

“…The activity of chitinase and leucine amino peptidase is promoted by N-enriched organic components, e.g., peptidoglucan accumulated as microbial residues during the biogas fermentation (Chen et al 2012). Furthermore, a clear shift in the structure of the microbial community in response to digestate application in comparison to an undigested feedstock was reported (Chen et al 2012;Abubaker et al 2013). Due to digestate application, the slowly growing microorganism became dominant and a transition of r to K strategists took place.…”

“…This shift seems to be related to changes in the fungi-to-bacteria ratio (data soil N and C inputs, soil N and C content, soil C/N ratio: Möller 2009; data soil water extractable C content: Schauss et al 2006;Schauss 2006). (Chen et al 2012). Abubaker (2012) also concluded that his findings indicate that two different types of microbial shifts occur in residue-amended soils, one faster shift directly correlated with functional properties and one slower shift that may be attributed to altered microbial community composition.…”

Phytochemical properties and heavy metal accumulation in wheat grain after three years’ fertilization with biogas digestate and mineral waste

“…BD also increases the content of organic C in the soil and reduces the rate of its transformation in comparison to non-digested input organic materials (Chen et al 2012, Johansen et al 2013, Lopedota et al 2013. BD contains more (60-70% of total N) mineral nitrogen (NH4 + / NH3 -) compared to different types of organic fertilizers (e.g., compost, cattle manure contains 6-30% mineral N of total N) (Svensson et al 2004, Alburquerque et al 2012, Lopedota et al 2013.…”