期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 366, 期 -, 页码 16-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.11.070
关键词
Nutritional slow-release; pH buffer; Function microorganisms; Biotrickling filter; Removal performance
资金
- Key Project of Zhejiang Province Natural Science Foundation [LZ17E080001]
- National Natural Science Foundation of China [51678528]
- Young Talent Cultivation Project of Zhejiang Association for Science and Technology [2016YCGC014]
The type of packing material for biofiltration has a great impact on microbial growth and pollutant removal. This study evaluated the feasibility of a nutritional slow-release packing material with functional microorganisms (NSRP-FM) in a biofilter for the removal of gaseous n-butyl acetate. Through the emulsification-cross linked process and microbial immobilization, an innovative packing material was obtained, with a specific surface area of 2.45 m(2) g(-1) and a bulk density of 40.75 kg m(-3). The cumulative release rates of total phosphorus and total nitrogen were 90.6% and 75.6%, respectively, as measured while continuously spraying deionized water. To evaluate the performance of biofiltration, NSRP-FM was compared with the commercial polyurethane foam (PU-foam), in two identical biotrickling filters (BTFs). The BTF packed with the prepared NSRP-FM maintained a consistent removal efficiency (over 95%) without nutrients addition and pH adjustment. The other BTF had poor removal performance, and the removal efficiency declined to 65% when there was no pH adjustment. Energy dispersive X-ray spectroscopy (EDS) analysis of NSRP-FM showed that inorganic elements were released during the operation of BTF. The abundance of functional microorganisms suggested that the prepared NSRP-FM provided a better environment for microbial growth, despite changes in the operating conditions.
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