A critical review on the interaction of substrate nutrient balance and microbial community structure and function in anaerobic co-digestion

Interactive Effects of Chemical Composition of Food Waste during Anaerobic Co-Digestion under Thermophilic Temperature

“…For the others, these were assigned to six phyla and others, which were Chloroflexi (2.6%), Proteobacteria (1.8%), Tenericutes (1.7%), Bacteroidetes (1.5%), Spirochaetes (1.5%), and Synergistetes (1.0%). Identical to previous studies, we found that Firmicutes and Chloroflexi were able to degrade a large number of organic compounds under a variety of conditions and had been found in a wide range of co-digestion [26]. Illumina MiSeq results indicated that the uppermost bacteria were all affiliated to the phylum Firmicutes in the five reactors and in the control fed with different proportions of substrates.…”

“…The average relative abundances of Firmicutes for T1, T2, T3, T4, and T5 reactors were 90.7%, 94.2%, 96.5%, 89.2%, and 92.5%, respectively ( Figure 4). This indicated that five reactors in this study may have achieved better digestion performance due to the predominance of Firmicutes and greater bacterial diversity [26]. For the others, these were assigned to six phyla and others, which were Chloroflexi (2.6%), Proteobacteria (1.8%), Tenericutes (1.7%), Bacteroidetes (1.5%), Spirochaetes (1.5%), and Synergistetes (1.0%).…”

“…In other words, although lipid had the highest BMP of the three chemical composition, for food waste, high BMP, and GR strongly relied on the appropriate ratios of these chemical composition, as well as their interactive effects. In general, the appropriate C/N ratio was used to enhance the performance of the anaerobic digestion, to improve the buffering capacity, to afford primary or secondary and trace nutrient elements, to dilute potential inhibitory or toxic composition, and the balance the system microenvironment [26]. Several reports agreed that the optimal value of C/N ratio ranges from 20-30 for anaerobic digestion [20,27].…”

“…Illumina MiSeq results indicated that the uppermost bacteria were all affiliated to the phylum Firmicutes in the five reactors and in the control fed with different proportions of substrates. Members of Firmicutes have been reported as the dominant community in reactors [26]. Moreover, most of the data in Firmicutes were attributed to the class Clostridia viz.…”

A Review on the Fate of Nutrients and Enhancement of Energy Recovery from Rice Straw through Anaerobic Digestion

“…Co-digestion offers various advantages like improved system stability, adjusted C/N ratio, a better nutrient balance, dilution of toxic compounds, improved buffer capacity, increased biodegradation, adjusted moisture content, a supply of TEs, and increasing OLR. It can therefore, enhance volumetric biogas recovery [61][62][63] and improves the fertilizer value of the digestate [64]. These advantages of co-digestion are presented in Figure 6.…”