A polypropylene microporous membrane (PPMM) was fabricated by thermally induced phase separation (TIPS) method. The effects of protein size and structure as well as filtration pressure on the membrane performance and fouling mechanisms were investigated using two different proteins, bovine serum albumin (BSA) and collagen, in dead-end filtration setup. Obtained results showed that, for each pro...

Although biological treatment of sewage by activated sludge or trickling filters is widely practiced, these processes still give rise to difficulties. The difficulties may be due to sludge bulking during the activated sludge process or to clogging during the operation of trickling filters. In his studies of biofilters and standard filters, H. Heukelekian (Sewage Works J. 17:23, 516, and 743, 19...

Nitrification is a necessary and often limiting process in animal waste treatment for removal of nitrogen as N2 through biological nitrification/denitrification systems. We evaluated three technologies for enhancing nitrification of pig lagoon wastewater prior to denitrification: overland flow, trickling filter, and a bioreactor using nitrifying pellets. The overland flow system consisted of a ...

conclusions although our patient had ckd stage 4, but his condition has not deteriorated and remained constant and stable for several years only by control of blood pressure and usual treatment which prescribed for patients at this stage case presentation a 78-year-old man presented with stage 4 ckd for 7 years; the glomerular filtration rate (gfr) and creatinine levels remained constant despit...

Biological removal of reduced sulfur compounds in energy-rich gases is an increasingly adopted alternative to conventional physicochemical processes, because of economical and environmental benefits. A lab-scale biotrickling filter reactor for the treatment of high-H(2)S-loaded gases was developed and previously proven to effectively treat H(2)S concentrations up to 12,000 ppm(v) at gas contact...

conclusions fasting in the month of ramadan in two consecutive years, and during the hottest months, in riyadh, saudi arabia, did not adversely affect kidney graft function. objectives to investigate the effect of repeated ramadan fasting during the hottest months of the year on renal graft functions. patients and methods this was a prospective cohort study comparing two groups of renal transpl...