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Disruption of microbial cell within waste activated sludge is a key step to the treatment of the sludge. Pulsed electric field (PEF) has been utilized to damage the cell microstructure so as to accelerate the sludge treatment. In this paper, with the purpose of improving the cell disruption efficiency of PEF, a dc corona assisted PEF method has been proposed. Corona discharge triggered by dc voltage...
The existence of space charge has a great effect on breakdown characteristic and is the main reason leading to dielectric breakdown. Fluorination as change the chemical component in surface layer of polymers should give rise to the corresponding change in electrical properties of the surface layer thus influence the charge injection from electrodes. This paper presents a study aimed at clarifying...
Room temperature vulcanized (RTV) silicone rubber (SiR) is a kind of basic insulating material and is widely used to coat porcelain and glass high voltage insulators. In HVDC transmission lines, electric corona could take place even on well-designed hardware and insulators, which could make charge accumulate on the surface of insulators and inject into the surface. However, with the disadvantage of...
Polyimide film, as a special type of engineering plastic film, is a kind of basic insulating material and is widely applied in the aerial, nuclear, microelectronic industry, turn to turn insulation and turn to ground insulation of inverter-fed motors. However, with the disadvantage of organic polymer, its corona-resistance property is not good enough, which makes insulation early failures occur frequently...
A new composite coagulant was prepared by polyaluminum chloride (PAC) and and polydimethyldiallylammonium chloride (PDMDAAC). The chemical species distribution, structure and surface charge of the composite coagulant (PAC-PDMDAAC) were studied by Al-Ferron complexation timed spectrophotometry, TEM and zeta potential measurement, respectively. And the coagulation efficiency of PAC-PDMDAAC was studied...
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