Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
680209 | Bioresource Technology | 2015 | 10 Pages |
Abstract
An ozone/ultrasound lysis-cryptic growth technology combining a continuous flow anaerobic-anoxic-microaerobic-aerobic (AAMAÂ +Â O3/US) system was investigated. Techno-economic evaluation and sludge lyses return ratio (r) optimization of this AAMAÂ +Â O3/US system were systematically and comprehensively discussed. Economic assessment demonstrated that this AAMAÂ +Â O3/US system with r of 30% (AAMAÂ +Â O3/US2# system) was more economically feasible that can give a 14.04% saving of costs. In addition to economic benefits, a 55.08% reduction in sludge production, and respective 21.17% and 5.45% increases in TN and TP removal efficiencies were observed in this AAMAÂ +Â O3/US2# system. Considering the process performances and economic benefits, r of 30% in AAMAÂ +Â O3/US2# system was recommended. Excitation-emission matrix and Fourier transform infrared spectra analyses also proved that less refractory soluble microbial products were generated from AAMAÂ +Â O3/US2# system. Improvement in 2,3,5-triphenyltetrazolium chloride electron transport system (TTC-ETS) activity in AAMAÂ +Â O3/US2# further indicated that a lower sludge lyses return ratio stimulated the microbial activity.
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Authors
Shan-Shan Yang, Wan-Qian Guo, Yi-Di Chen, Qing-Lian Wu, Hai-Chao Luo, Si-Mai Peng, He-Shan Zheng, Xiao-Chi Feng, Xu Zhou, Nan-Qi Ren,