Emerging applications of biochar : Improving pig manure composting and attenuation of heavy metal mobility in mature compost

• This study evaluated the effect of integrated bacterial culture and biochar on heavy metal (HM) stabilization and microbial activity during pig manure composting. High-throughput sequencing was carried out on six treatments, namely T1-T6, where T2 was single application of bacteria culture (C), T3 and T5 were supplemented with 12 % wood (WB) and wheat-straw biochar (WSB), respectively, and T4 and T6 had a combination of bacterial consortium mixed with biochar (12 % WB and 12 % WSB, respectively). T1 was used as control for the comparison. The results show that the populations of bacterial phyla were significantly greater in T6 and T4. The predominate phylum were Proteobacteria (56.22 %), Bacteroidetes (35.40 %), and Firmicutes (8.38 %), and the dominant genera were Marinimicrobium (53.14 %), Moheibacter (35.22 %), and Erysipelothrix (5.02 %). Additionally, the correlation analysis revealed the significance of T6, as the interaction of biochar and bacterial culture influenced the HM adsorption efficiency and microbial dynamics during composting. Overall, the integrated bacterial culture and biochar application promoted the immobilization of HMs (Cu and Zn) owing to improved adsorption, and enhanced the abundance and selectivity of the bacterial community to promote degradation and improving the safety and quality of the final compost product. © 2020 Elsevier B.V.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Industriell bioteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Industrial Biotechnology (hsv//eng)

Nyckelord

Bacteria; Composting; Fertilizers; Heavy metals; Mammals

Bacteria community; Bacterial cultures; Bio chars; Pig manures; Toxic metals

Manures

DNA 16S; heavy metal

bacterium; biochar; compost; composting; element mobility; heavy metal; manure; microbial community; toxic substance

Article; bacterium culture; Bacteroidetes; community structure; comparative study; composting; controlled study; DNA extraction; DNA purification; electric conductivity; Erysipelothrix; Firmicutes; high throughput sequencing; microbial activity; microbial community; nonhuman; Proteobacteria; pyrolysis; swine manure

Bacteria (microorganisms); Bacteroidetes; Erysipelothrix; Firmicutes; Marinimicrobium; Proteobacteria; Suidae; Triticum aestivum

Resource Recovery

Resursåtervinning

Resource Recovery

Resursåtervinning

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)