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The production of energy from the sea is taking an increasingly important role in energy policy. Among the most promising there is the production of energy by means of Wave Energy Converters (WEC), that allows to exploit the potential of sea waves, starting from their periodic structure. At the same time waveforms that can be obtained from such power take off (PTO) do not allow an effective rectifying...
This article investigate the interconnection between marine sea wave generators and power distribution networks. In particular, it assumes that introducing a spatial offset between generators, and considering them as an unique array, it is possible to improve conversion efficiency. The proposed architecture consider an array of Wave Energy Converter (WEC) interfaced with an electronic power converter,...
Enterobacter cloacae is significant causes of nosocomial infections. The present study aimed to evaluate the antibiotic resistance profiles of Enterobacter cloacae isolated from the First Bethune Hospital. Disk diffusion method was used to study the antimicrobial resistance. The data were analyzed by WHONET 5 software according to Clinical and Laboratory Standards Institute (CLSI). The majority of...
Building on previous service design theories, the authors propose an integrative framework for service design. Through an extensive literature review and qualitative fieldwork in eight Asian service organizations, the authors specify nine constructs with 62 measurement items. These are validated and refined using data from 28 survey respondents. The authors further explore the relationship among the...
The effects of pH on the hydrolysis and acidification from WAS in mesophilic and thermophilic anaerobic fermentation was investigated in this study. Both the mesophilic and thermophilic waste activated sludge (WAS) hydrolysis were improved significantly at alkaline pHs than at other pHs. Themophilic conditions improved the WAS hydrolysis compared to that mesophilic ones. The accumulation of short-chain...
This paper investigated the influence of pH on short-chain fatty acids (SCFAs) production and constituents with anaerobic fermentation of primary sludge from a Chinese wastewater treatment plant (WWTP). Controlled and uncontrolled pH experiments were conducted in ten completely mixed bench-scale reactors. Results showed that pH significantly influenced on the SCFAs yields and constituents from primary...
A series of batch experiments on improving production of soluble substrates such as soluble chemical oxygen demand (SCOD), Short-chain fatty acids (SCFAs), soluble protein as well as soluble carbohydrate from primary sludge fermentation were conducted controlling pH at 4, 7, 10 and uncontrolled (the blank test). Results presented that pH 10 had great advantages over improvements of soluble organic...
In order to enhance the efficiency of anaerobic digestion, the effect of alkaline pre-treatment has been studied on waste activated sludge(WAS) from a wastewater treatment plant(WWTP) in Shanghai, China. The results indicated that sodium hydroxide strongly influenced the solubilization of sludge and subsequent anaerobic digestion. The COD and protein solubilization was most effective when sludge was...
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