نتایج جستجو برای: trickling filtration

تعداد نتایج: 38335  

Journal: :Environmental Health Perspectives 1979
I A Veldre A R Itra L P Paalme

Data on the content of benzo(a)pyrene (BP) in oil shale industry wastewater, the effectiveness of various effluent treatment processes (evaporation, extraction with butyl acetate, trickling filters, aeration tanks) in reducing the level of BP in oil shale wastewater, the level of BP in various bodies of water of Estonia, and in fish and other water organisms are reviewed. The quantitative deter...

Journal: :Environmental pollution 2000
J H Langwaldt J A Puhakka

On-site biological treatment has been used for groundwater cleanup from industrial and agricultural chemicals. The pump-and-treat efficiency is controlled by retardation of contaminants by sorption onto the saturated subsurface solids and by the presence of non-aqueous-phase liquids in the aquifer. On-site bioreactors have been widely used for treatment of contaminants such as petroleum hydroca...

Journal: :nephro-urology monthly 0
rizna abdul cader nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia; nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, jalan yaacob latif, 56000, kuala lumpur, malaysia. tel: +603-91456097, fax: +603-91735316 halim abdul gafor nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia rozita mohd nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia wei yen kong nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia norazimah arshad nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia norella kong nephrology unit, department of internal medicine, universiti kebangsaan malaysia medical centre, kuala lumpur, malaysia

conclusions the high prevalence of fungaemia and mortality could be attributed to many patients on chronic immunosuppressive therapy. nonetheless, cpfa albeit expensive, does add to our armamentarium of extracorporeal treatment for severe sepsis. regional citrate anticoagulation with cpfa may overcome problems with filter clotting. objectives the main objective was to review our centers' e...

Journal: :international journal of occupational hygiene 0
somayeh farhang dehghan department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran farideh golbaaei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran bozorgmehr maddah department of chemistry, imam hossein university, tehran, iran rasoul yarahmadi department of occupational health, school of public health, iran university of medical sciences, tehran, iran asghar sedigh zadeh nuclear fusion research center, atomic energy organization, tehran, iran

original article   electrospun nanofibrous filter media have attracted considerable attention in the last decade. the present study aimed to develop the electrospun pan (polyacrylonitrile) filter media through experimental investigations for application in high-performance air filters. for this purpose, an experimental design was proposed to assess the effect of electrospinning process conditio...

Journal: :iranian journal of public health 0
f vaezi ah mahvi g safari

conventional sand filtration which has become a common wastewater treatment technology to satisfy regulations appointed for effluent reuse, suffers from the disadvantage of high energy for backwashing. the subject of this study is application of downflow floating media prior to coarse sand filtration, which requires less water for backwash. two pilots have been employed in two stages. for the f...

E. Leusheva V. Morenov,

Filtration of the drilling mud is one of it's most important parameters, especially when drilling-in producing formation. Decrease of filtration characteristics allows reducing both solid and liquid phases's penetration zone into the formation. The study of the effect of the weighting-bridging agent's fractional composition on the filtration rate allows selecting of optimal composition of the s...

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