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
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.
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