There are two classes of membrane treatment systems low-pressure membrane systems (such as microﬁltration and ultraﬁltration) and high-pressure membrane systems (such as nanoﬁltration and reverse osmosis).
Low-pressure membranes, including microﬁltration (MF) and ultraﬁltration (UF), are operated at pressures ranging from 10 to 30 psi, whereas high-pressure membranes, including nanoﬁltration (NF) and reverse osmosis (RO), are operated at pressures ranging from 75 to 1000 psi
The Ultra-Filtration Membrane System from GWTs combines unequaled membrane strength with high permeability to create a system solution that provides exceptional efﬂuent quality, meeting the most stringent requirements. This external ultra-ﬁltration system is ideal for reverse osmosis pre-treatment plants, drinking water, industrial water, tertiary wastewater, and reuse applications that require low efﬂuent suspended solids or phosphorus.
Desalination has proven the most signiﬁcant and effective solution to meet the challenges of population growth and water scarcity in many countries. Reverse Osmosis is the most widespread desalination process because of its efﬁciency and adaptability to any capacities. Through continue R&D in membrane and technology improvement, costs of RO desalination has radically decreased, making this technology highly competitive.
Accepting customers environmental and economic constraints, GWT‘s team has been successful in providing solutions to water scarcity and pollution issues. Considering the inlet water quality and integrating the membrane technology in the entire treatment line, GWT has delivered customized and packaged solutions to ensure plant performance and high water quality.
Reverse Osmosis Systems to purify water by removing salts, contaminants and other impurities. It is also capable of rejecting bacteria, sugars, proteins, particles, dyes, and other constituents that have a molecular weight of greater than 150-250 daltons. Energy Recovery Devices: Reverse Osmosis Desalination of sea water process operates under high pressure and the energy requirement is very huge. With an Energy Recovery Devices (ERD) when combined with desalination facilities will give a larger saving in energy expenses and improved desalination process efﬁciency. The pressure exchanger systems recover 90% of the energy, reducing energy demand by between 10-40% and therefore reducing operating costs.
Membrane Bio-Reactor is a treatment tehcnology wherein both biological oxidation and membrane physical separation with membranes that are submerged in the biomass, either inside the bioreactor itself or in a separate tank. The membranes are submerged directly in the bioreactor or in a separate tank and ﬁltration takes place by applying vacuum to the inside of the membrane. Membrane fouling is prevented by the ﬂow of coarse air bubbles along the membrane surface or periodic back ﬂushing.
Prerequisites for the application of submerged Membrane Bioreactors:
One of the distinct advantages of submerged Membrane Bioreactors is their low energy consumption.Submerged membrane tank, part of a system treating leachate from a landﬁll.