期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 192, 期 -, 页码 302-308出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2017.01.080
关键词
Green bio-sorption reactor (GBR); Alum sludge; Constructed wetland; Activated sludge; Aesthetic value; Simultaneous nitrification and denitrification (SND)
资金
- University College Dublin
- China Scholarship Council
In the present study, a novel green bio-sorption reactor (GBR) was firstly proposed and preliminarily investigated by embedding constructed wetland (CW) into the aeration tank of the conventional activated sludge (CAS). This integrated novel system owns the striking features of adding carriers of wetland substrate (i.e. the dewatered alum sludge in this case) in CAS for robust phosphorus adsorption and enriching the biomass. Meanwhile, the green feature of this GBR imparted aesthetic value of CW to the CAS system. The preliminary 3-month trial of GBR based on a sequencing batch reactor (GB-SBR) with diluted piggery wastewater demonstrated an average removal of 96%, 99% and 90% for BOD, TP and TN, respectively. The comparison with moving bed biofilm reactor (MBBR) and integrated fixed-film activated sludge (IFAS) reflected the advantages of GBR over purification performance, aesthetic value and potential carbon sink. Moreover, the carriers used in the GBR are dewatered alum sludge which is in line with the policy of recycle, reuse and reduce. Overall, this GBR undoubtedly offered a more sustainable and economical solution for retrofitting the aging CAS. (C) 2017 Elsevier Ltd. All rights reserved.
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