82
3 Bio-augmented Composting of Organic Wastes in Villages and Towns
Fig. 3.13 Change of Shannon-Winner
bands and Shannon-Weaver index under T1 showed the same change trend with
those under T2 during the composting period. The number of bands and ShannonWeaver index under T3 exhibited a significant difference with those under T4 (p <
0.05): during the high-temperature period of composting, the number of bands and
Shannon-Weaver index under T3 were significantly larger than those under T4. It
indicated that abundant nutrient substance in windrows can improve the diversity of
bacteria during cooling and maturation periods of composting. Additionally, after
passing the high-temperature period, the number of bands and diversity index under
T3 greatly declined and then they significantly rose owing to the temperature of the
compost decreased. In the end of composting, the organic matters in windrows prone
to be degraded were consumed out and the wood-fibre macromolecular substances
hard to be degraded were left. Therefore, the number of bands and Shannon-Weaver
index under T3 also gradually reduced.
The predominant bands in different experimental groups during composting were
subjected to sequencing and the sequencing results were deposited into Genebank
for a comparison. The result is shown in Table 3.5. During the humification of
the windrows of mixed biogas residues, bacteria in Proteobacteria and Firmicutes,
Acinetobacter spp., compost bacteria and a great number of bacteria which cannot
be cultured by using traditional methods but play an important role, were detected.
Moreover, Fusobacterium spp., Bacteroides spp. and Pseudomonas spp. which can
degrade lignocelluloses were detected. It is worth noting that non-cultured anaerobic
bacteria, Desulfotomaculum spp. and Psychrobacter spp. were found in the compost
of mixed materials of biogas residues. It implied that compared with the compost
of single materials, the mixed composts (biogas residue, pig manure and chicken
manure) presented higher diversity of functional microorganism.
3 Bio-augmented Composting of Organic Wastes in Villages and Towns
Fig. 3.13 Change of Shannon-Winner
bands and Shannon-Weaver index under T1 showed the same change trend with
those under T2 during the composting period. The number of bands and ShannonWeaver index under T3 exhibited a significant difference with those under T4 (p <
0.05): during the high-temperature period of composting, the number of bands and
Shannon-Weaver index under T3 were significantly larger than those under T4. It
indicated that abundant nutrient substance in windrows can improve the diversity of
bacteria during cooling and maturation periods of composting. Additionally, after
passing the high-temperature period, the number of bands and diversity index under
T3 greatly declined and then they significantly rose owing to the temperature of the
compost decreased. In the end of composting, the organic matters in windrows prone
to be degraded were consumed out and the wood-fibre macromolecular substances
hard to be degraded were left. Therefore, the number of bands and Shannon-Weaver
index under T3 also gradually reduced.
The predominant bands in different experimental groups during composting were
subjected to sequencing and the sequencing results were deposited into Genebank
for a comparison. The result is shown in Table 3.5. During the humification of
the windrows of mixed biogas residues, bacteria in Proteobacteria and Firmicutes,
Acinetobacter spp., compost bacteria and a great number of bacteria which cannot
be cultured by using traditional methods but play an important role, were detected.
Moreover, Fusobacterium spp., Bacteroides spp. and Pseudomonas spp. which can
degrade lignocelluloses were detected. It is worth noting that non-cultured anaerobic
bacteria, Desulfotomaculum spp. and Psychrobacter spp. were found in the compost
of mixed materials of biogas residues. It implied that compared with the compost
of single materials, the mixed composts (biogas residue, pig manure and chicken
manure) presented higher diversity of functional microorganism.