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Adav S.S.,Harbin Institute of Technology | Adav S.S.,National Taiwan University | Lee D.-J.,Harbin Institute of Technology | Lee D.-J.,National Taiwan University | Lai J.-Y.,Chuan Yuan Christian University
Applied Microbiology and Biotechnology | Year: 2010

Aerobic sludge granules are compact, strong microbial aggregates that have excellent settling ability and capability to efficiently treat high-strength and toxic wastewaters. Aerobic granules disintegrate under high organic loading rates (OLR). This study cultivated aerobic granules using acetate as the sole carbon and energy source in three identical sequencing batch reactors operated under OLR of 9-21.3 kg chemical oxygen demand (COD) m-3 day -1. The cultivated granules removed 94-96% of fed COD at OLR up to 9-19.5 kg COD m-3 day-1, and disintegrated at OLR of 21.3 kg COD m-3 day-1. Most tested isolates did not grow in the medium at >3,000 mg COD l-1; additionally, these strains lost capability for auto-aggregation and protein or polysaccharide productivity. This critical COD regime correlates strongly with the OLR range in which granules started disintegrating. Reduced protein quantity secreted by isolates was associated with the noted poor granule integrity under high OLR. This work identified a potential cause of biological nature for aerobic granules breakdown. © 2009 Springer-Verlag. Source

Luo J.N.,Ming Chuan University | Yang M.H.,Chuan Yuan Christian University | Huang S.-Y.,Chuan Yuan Christian University
Computers and Electrical Engineering | Year: 2015

A number of mobile payment studies have been proposed in recently years. Most of the schemes are largely focused on transaction security, not on users' privacy. In this paper, we propose an Unlinkable Anonymous Payment Scheme to provide a secure and anonymous mobile commerce environment. In the proposed protocol, a user applies an anonymous virtual credit card from a trusted service manager. The sensitive information of the applied credit card is stored in the secure elements of user's mobile device. Our proposed protocol ensures various imperative security properties such as anonymity, unlinkability, and non-repudiation etc. © 2015 Elsevier Ltd. Source

Lai Y.-C.,National Taiwan University | Chang Y.-R.,National Taiwan University of Science and Technology | Chen M.-L.,Taipei City Government | Lo Y.-K.,Taipei City Government | And 4 more authors.
Bioresource Technology | Year: 2016

Cesium (Cs) removal from contaminated water bodies is an emerging issue after the disaster at the Fukushima Daiichi Nuclear Power Plant. The Prussian blue (PB) is an effective Cs adsorbent but will release hexacyanoferrate fragments from the adsorbent matrix during adsorption. Alginate is an affordable biopolymer for PB particles immobilization. This study synthesized poly(vinyl alcohol) (PVA) and alginate cross-linked matrix for immobilization of PB nano-sized particles and a surface-modified styrene-ethyl styrene divinyl benzene resin and tested their swelling stability and Cs adsorption performance in fresh water and in seawater. The PVA-alginate granules have high structural stability in both fresh water and seawater, with the Cs adsorption capability higher for the former than the latter. The adopted resin effectively remove released PB fragments from the tested granules. The transport and reaction parameters for the granules and for the sand filter bed were estimated. © 2016 Elsevier Ltd. Source

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