up flow anaerobic sludge blanket (uasb) reactors have been increasingly used for industrial wastewater treatment. because of existing problems in startup step of these reactors, in this research the startup of a uasb in pilot scale and room temperature condition was studied. the total height of uasb reactor was 270 cm and effective height was 240 cm. diameter of the reactor in lower part was 20...

in spite of the existing reports on behavioural and biochemical changes related to the cerebellum due to noise stress, not much is known about the effect of noise stress on the neuronal changes in the cerebellum. the present study aims at investigating the effects from one week noise exposure on granule cell number and purkinje cell volume within the neonate rat cerebellum. 15-day-old male wist...

To understand the long-term stability of nitrifying granules in a membrane bioreactor (GMBR), module was submerged an airlift reactor to eliminate hydraulic selection pressure that believed be driving force aerobic granulation. The monitoring results showed structure could remain stable for 305 days GMBR without pressure; however, majority granule actually inactive due mass diffusion limitation...

background: indoor residual spraying (irs) is functioned as national interventions against malaria in southeastern foci of iran and deltamethrin wp one of the insecticides have been used since past decade. in this study, the residual activity of the wettable granule (wg) was studied on different surfaces in hut scale trial against anopheles stephensi   in iranshahr district, southeastern iran. ...

Understanding the relationship between processing parameters of fluidized bed wet granulation and the characteristics of intermediate and final products is crucial in the pharmaceutical processes. This research examined a fluidized bed wet granulation process containing a cornstarch solution as binder and lactose particles as powder. The design of experiment (DoE) was performed according to an ...

To elucidate how high dissolved oxygen (DO) favors the startup of nitritation with aerobic granular sludge, two reactors were operated under low (1–2 mg O2·L−1) and DO (3–5 conditions similar effluent ammonium concentrations (>20 N·L−1). The results showed that though an average nitrite accumulation ratio above 95% was finally achieved in both reactors, a five-fold start-up time (eleven weeks) ...

Abstract Poly(3-hydroxybutyrate) (PHB) granule formation in Paracoccus denitrificans Pd1222 was investigated by laser scanning confocal microscopy (LSCM) and gas chromatography analysis. Cells that had been starved for 2 days were free of PHB granules but resynthesized them within 30 min growth fresh medium with succinate. In most cases, the distributed randomly, although some cases they appear...

The geometric dimensions of the copper shell formed by chemical deposition on a spherical polyethylene granule were calculated. It is shown that main factor determining thickness layer initial size granule. processes destruction during thermal expansion polymer are considered. values limit temperatures in which still retains its integrity depending

Granular sludge is a novel alternative for the treatment of wastewater and offers numerous operational and economic advantages over conventional floccular-sludge systems. The majority of research on granular sludge has focused on optimization of engineering aspects relating to reactor operation with little emphasis on the fundamental microbiology. In this study, we hypothesize two novel mechani...