s of Posters • Decision Support System (D.S.S.) for regional and national water-supply planning .............124 N. Hassid, E. Adar ZIWR, Jacob Blaustein Institutes for desert studies, Ben Gurion University of the Negev, Israel • Mechanical strength of virgin and cleaned ultra filtration membranes ..............................128 E. Arkhangelsky, V. Gitis Unit of Environmental Engineering, Ben...

Formaldehyde (FA) is a very toxic pollutant. FA in indoor air has a negative effect on human health and should be removed by ventilation or by conversion to non-toxic products. The formaldehyde dehydrogenase (FdDH), a NADand glutathione-dependent enzyme from recombinant methylotrophic yeast Hansenula polymorpha, was tested for its ability to oxidize airborne FA. A continuous fluidized bed biore...

Air-lift-pump merupakan suatu rangkaian alat yang digunakan untuk memindahkan air dan campuran (berlumpur) dari tempat ke titik lain. Sistem kerja air-lift-pump melalui media pipa dengan cara menginjeksi udara pada saluran bawah terendam. Tekanan aerator akan mendorong bergerak atas menuju arah sama melewati pipa. Cairan kental atau lumpur dapat dinaikan menggunakan air-lift-pump. Gaya apung me...

A new type of bioreactor for air pollution control has been developed. The new process relies on an organic-phase emulsion and actively growing pollutant-degrading microorganisms, made into a foam with the air being treated. This new reactor is referred to as a foamed emulsion bioreactor (FEBR). As there is no packing in the reactor, the FEBR is not subject to clogging. Mathematical modeling of...

The performance of a forced-liquid Vertical Tubular Loop Bioreactor (VTLB), a forced-liquid Horizontal Tubular Loop Bioreactor (HTLB) and a gas-induced External Airlift Loop Bioreactor (EALB) were compared for production of biomass from natural gas. Hydrodynamic characteristics and mass transfer coefficients were determined as functions of design parameters, physical properties of gases as ...