Open AccessEvaluation of compost, vegetable and food waste as amendments to improve the composting of NaOH/NaClO-contaminated poultry manure
Author(s) -
Yuting Liu,
Wenxia Wang,
Jianqiang Xu,
Xue Han,
Kim Stanford,
Tim A. McAllister,
Weiping Xu
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0205112
Subject(s) - compost , food waste , food science , manure , chemistry , chicken manure , amendment , green waste , alkalinity , agronomy , biology , ecology , political science , law , organic chemistry
Regular usage of NaOH/NaClO disinfectants results in high sodium salt and alkalinity of poultry manure. This study compared three amendments: vegetable waste (V), food waste (F) and mature compost (C) for their ability to improve the composting of NaOH/NaClO-contaminated poultry manure. C compost resulted in the highest compost temperatures ( p <0.001) and greatest reduction in OM, TC, TN and NH 4 -N ( p <0.05). C and V composts were more efficient at lowering extractable-Na (ext-Na) and electrical conductivity (EC) than F ( p <0.05). Maturity was primarily indicated by NH 4 -N, EC and ext-Na. Bacterial dynamics was profoundly influenced by NH 4 -N, EC and TC, with the decrease leading to discriminate genera shift from Sinibacillus and Thiopseudomonas to Brevbacterium , Brachybacterium , and Microbacterium . These findings suggest that mature compost was more desirable amendment than vegetable and food waste in the composting of NaOH/NaClO-contaminated poultry manure, and the decrease of ext-Na indicated compost maturity but did not influence bacterial dynamics.