Research Abstracts

Vacuum Membrane Distillation is studied for the concentration of fruit juices up to 50°Brix. The fluxes of water and of the relevant aroma compounds are experimentally examined for a typical must, as a function of temperature, sugar content and downstream pressure. The process leads to juice concent

A lipase-immobilized biphasic membrane reactor was applied for the optical resolution of racemic 2-hydroxy octanoic acid. Lipase from Candida rugosa or Pseudomonas cepacia was used as a biocatalyst, and three kinds of capillary membranes were employed as immobilization supports. The (S)-isomer of ra

The study of microbial interactions often requires fastidious and sometimes expensive analytical methods. A reactor specifically designed to carry out studies of interacting populations was developed. Its basic principle consists in keeping both strains of the mixed culture separate by the way of a

This work addresses the enzymatic hydrolysis of beechwood xylan on a membrane reactor with tangential flow over an ultrafiltration membrane. The hydrolysis was carried out on concentration mode, with circulating substrate, and results were compared with those obtained for batch assays. The oligosacc

Economical feasibility of xylitol production by microorganisms depends directly on the efficiency of conversion and productivity. A potential alternative to ensure this objective is continuous bioconversion. Xylitol production and separation methodology by a biotechnological route using the benefits

Membrane bioreactors (MBRs) have been used increasingly for municipal wastewater treatment. The current wastewater treatment plants are designed to treat three times the average flow in dry weather (DWF) which covers the expected range of incoming flow rates. If throughput in MBRs can be changed rea

Enhanced biological phosphorous (Bio-P) removal process was adapted to membrane bioreactor (MBR). One bench-scale pilot plant (BSP, 200–250 L) and two medium-scale pilot plants (2//MSP, 1000–3000 L each) were operated under several configurations, including pre-denitrification and post-denitrificati

This paper presents a study that aims to overcome oxygen limitations in membrane-attached biofilms in the Extractive Membrane Bioreactor (EMB), by using nitrate instead of oxygen as an electron acceptor. In the EMB target organic compounds are extracted through a dense membrane into a bioreactor, wh

The removal of low molecular mass charged compounds from water streams in an ion exchange membrane bioreactor (IEMB) was studied. This integrated membrane process combines continuous ion exchange transport (Donnan dialysis) of the pollutant through a non-porous membrane, selective for the transport

Much work has been done on the dyeing water treatment by a new method of the combination of crossflow microfiltration, flocculation and ceramic membrane technique with some successful results caused by the advantages of the combination. The kind of flocculation and its dosage are studied, which is u