A microwave-H2O2 process for sludge pretreatment exhibited high efficiencies of releasing organics, nitrogen, and phosphorus, but large quantities of H2O2 residues were detected. A uniform design method was thus employed in this study to further optimize H2O2 dosage by investigating effects of pH and H2O2 dosage on the amount of H2O2 residue and releases of organics, nitrogen, and phosphorus. A...

Membrane fouling limits the effects of long-term stable operation of membrane bioreactor (MBR). Control of membrane fouling can extend the membrane life and reduce water treatment cost effectively. A pilot scale anoxic/aerobic-membrane bioreactor (A/O-MBR, 40 L/hr) was used to treat the hyperhaline municipal sewage from a processing zone of Tianjin, China. Impact factors including mixed liquid ...

This paper proposes and evaluates a multi-level system of steganography (MLSS) which is a combination of steganography, cryptography and compression. Data encryption standard is the encryption algorithm used while the compression algorithm is Lempel-Ziv. Our approach scans through each of the cover image pixels, encodes the message bits with the green object of the pixel component and replaces ...

Dioctadecyldimethylammonium bromide (DODAB) is a double chain cationic lipid, which assembles as bilayer structures in aqueous solution. The precise structures formed depend on, e.g., lipid concentration and temperature. We here combine differential scanning calorimetry (DSC) and X-ray scattering (SAXS and WAXS) to investigate the thermal and structural behavior of up to 120 mM DODAB in water w...

Abstract We introduce multi-branch repeater laser stations (MLSs) for the dissemination of an ultra-stable signal from one point to multiple users and simultaneous evaluation stability accuracy links. perform study noise floor this new instrument. present then optical fiber network 4800 km built with three MLSs 13 (RLSs). show multi-user frequency on four links totalizing 2198 uncertainties bel...

The arrival of new media technology has the potential to radically change education. It has become important for both academics and practitioners to understand the behavioural intentions of students towards media technology. Many scales have been developed to measure the attitudes of secondary students towards the usage of media technology. However, few scales have been developed to assess medi...

The effect of environmental conditions on the diversity and interactions of microbial communities has caused tremendous interest in microbial ecology. Here, we found that with identical influents but differing operational parameters (mainly mixed liquor suspended solid (MLSS) concentrations, solid retention time (SRT) and dissolved oxygen (DO) concentrations), two full-scale municipal wastewate...