ORIGINAL RESEARCH
Simulated Ammonia Nitrogen Wastewater
Treated with Spent Mushroom Compost
in a Laboratory Bioreactor
Yunlong Yang1, Wei Liang2, Kaihui Hu1
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1College of Life Science, Fujian Agriculture and Forestry University,
Fuzhou 350002, PR China
2College of Real Estate, Beijing Normal University,
Zhuhai 519087, PR China
Submission date: 2016-03-30
Final revision date: 2016-05-08
Acceptance date: 2016-05-08
Publication date: 2016-10-05
Pol. J. Environ. Stud. 2016;25(5):2197-2203
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ABSTRACT
The simulated ammonia nitrogen wastewater was treated with spent mushroom compost (SMC)
in a laboratory bioreactor (LBR), and shifts in microbial diversity in LBR were conducted by polymerase
chain reaction and denaturing gradient gel electrophoresis (PCR-DGGE). We found that the removal
efficiencies of NH4+-N and COD reached 73.4% and 61.7%, respectively, and that simultaneous nitrification
and denitrification (SND) was observed during the process of NH4+-N removal. In addition, we observed
that there were no obvious changes in microbial diversity shifts, and that the predominant four isolates were
identified as Flavobacterium johnsoniae, Sphinbacterium multivorum, Comamonas sp., and Rhizobium sp.,
which functioned together and played a critical role in treating simulated ammonia nitrogen wastewater
in LBR. Overall, SMC could provide both carbon sources and indigenous functional microorganisms
for nitrogen removal, indicating that SMC has potential for wastewater treatment.