A fuzzy linguistic model was developed to simulate the effect of leachate recirculation and sludge addition on the biogas generation in anaerobic bioreactor landfills. The model was designed using a fuzzy logic system which incorporated 3 input variables (time, leachate recirculation, and sludge addition) and a single manipulated output (biogas generation rate). The experimental work involved t...

Vascular accesses consist of permanent arteriovenous (AV) accesses (autogenous fistulas and synthetic grafts) and venous accesses (central venous catheters [CVCs]). AV accesses have fewer complications than venous accesses, and are therefore the preferred hemodialysis access. An important additional issue is whether the type of access influences adequacy of dialysis (i.e. Kt/V). Key limiting fa...

Article history: Received on: 05/01/2015 Revised on: 22/01/2015 Accepted on: 07/02/2015 Available online: 27/02/2015 The purpose of current study was to compare the influence on sanitary hygienic parameters of water in recirculation aquaculture systems (RAS) using natural zeolite and macrophytes Lemna minor and Elodea canadensis like a part of its filtration system with the microbiological indi...

Dr. José Guiserix, Service de Néphrologie-Dialyse, Centre Hospitalier Alfred Isautier, BP 350 CHGSPT, F-97448 Saint-Pierre de la Réunion (France) 40 -i Acknowledgment We are indebted to Mr. Eric Woljung for assistance in the preparation of the manuscript. Dear Sir, Despite its limitations [1], the three-sample method is still widely used for blood recirculation estimation to detect underdialysi...

Three-dimensional numerical analyses of flow and transport characteristics in two representative multichamber ozone contactor models with different chamber width were conducted using large eddy simulation LES . Both time-averaged and instantaneous flow patterns suggest that the flow is characterized by the occurrence of large turbulent structures leading to extensive short-circuiting between ch...

We explored the temporal and topographic relations between local cerebral blood flow and regional brain prostaglandin profile following prolonged or transient occlusion of the middle cerebral artery in cats. Each experimental group was subjected to a sham operation, prolonged ischemia, or recirculation. Local cerebral blood flow was measured by the hydrogen clearance method. Following in situ f...

Recirculation systems create unique environments for fish culture. Opportunistic microorganisms may cause disease due to favorable conditions occurring in recirculation systems. The biofilters used may become reservoirs of infectious microorganisms. Stressful conditions such as suspended solids in culture tanks and high rearing densities may contribute to disease outbreaks. Additionally, noninf...

The effect of recirculation in increasing organic loading rate (OLR) and decreasing hydraulic retention time (HRT) in a semi-continuous two-stage anaerobic digestion system using stirred tank reactor (CSTR) and an upflow anaerobic sludge bed (UASB) was evaluated. Two-parallel processes were in operation for 100 days, one with recirculation (closed system) and the other without recirculation (op...

Whether the calcium entry blocker, nimodipine, prevents the increase in the concentration of free fatty acids and metabolic disturbances during ischemia and promotes functional and metabolic recovery after recirculation were examined. Severe forebrain ischemia in rats was induced by four-vessel occlusion with mild hypotension. After 30 minutes of ischemia, recirculation was started by removal o...

A microbial fluidized electrode electrolysis cell (MFEEC) was used to enhance hydrogen gas production from dissolved organic matter. Flowable granular activated carbon (GAC) particles were used to provide additional surface area for growth of exoelectrogenic bacteria. The use of this exoelectrogenic biofilm on the GAC particles with fluidization produced higher current densities and hydrogen ga...