This presentation focuses on membrane nanofiltration. Discussed in detail are membrane characteristics, applications for nanofiltration technology and system considerations. Discussion on the use of nanofiltration membranes in combination with brackish water membranes for hydraulic balancing is also discussed....

This presentation discusses the construction of membrane elements and how to best measure performance based on salt passage. Procedures are covered introducing the short pulse method of element verification testing to verify a series of membrane quality possibilities....

The focus of this paper is the performance of an ultrafiltration pretreatment system, for a power plant located in the Northern part of China. The power plant has limited water resources so they are able to divert sea water for use as a raw water source. The raw water quality posted a challenging condition for the desalination treatment. The sea wa...

The mission of the Affordable Desalination Collaboration (ADC) is to promote seawater desalination using reverse osmosis (SWRO) as an affordable, viable source of fresh water. In order to accomplish this mission the ADC conducted a multiphase pilot taking feed water from the Pacific Ocean (Navy intake at Port Hueneme, CA). This paper contain pilo...

This project has faced numerous challenges including: pilot testing with a competitors product, design and construction by an OEM that is no longer in the water treatment business, broken fibers discovered during start up, no chemical feed equipment to control biofouling, remote location for supplies and service, and upstream process changes to add...

Seawater desalination generally requires robust pretreatment in order to be sustainable and cost effective. This paper provides an overview of commonly used pretreatment technologies including MF/UF, intake configurations and conventional treatment....

RO module product development increases daily. Development can also mean replacement challenges in WTPs. Single element and full array studies are 2 approaches in pilot studies, and costs can vary significantly. Recovery and flux tracking method is cheaper and more accurate. it combines existing infrastructure with advanced instrumentation and cont...

Treatment of sourcewater with higher contaminant loadings results in increased fouling rates on RO membranes. Pretreatment of the sourcewater is required to improve membrane performance. This paper reports tests conducted on a novel membrane with improved "extra fouling resistant" XFR membranes. Lab scale studies demonstrate both improve resistanc...

This presentation elaborates on functions and construction principles of Ultrafiltration and Microfiltration. These membrane processes reject particles, pathogens, high molecular weight species, and ultimately, lower turbidity. However, UF and MF do not reject any dissolved salts, dissolved organics, or other species like true color and taste & ...

The purpose of this paper is to introduce and demonstrate the unique optimization of chemical addition pretreatment and ultrafiltration membrane. The Baker WV pilot presentation will focus on optimizing on chemical addition upstream of ultrafiltration system, and the corresponding contaminant removal achieved by the unit operations for this surface...

This presentation discusses the importance of charge and mass balance in membranes system design....

Repeat- See Line Number 2 above...

This PowerPoint discusses the basics of reverse osmosis technology....

Discusses treatment alternatives and key issues involved with recovery of high salinity frac flowback and produced water, including ion exchange, UF, NF, and RO. Discusses challenge of water soluble organics and use of regenerable polymeric adsorbents....

This presentation will discuss membrane filtration technologies. The variations in the technologies including polymer chemistry, pore size differences, flow configurations, and module format will be discussed. In addition the typical applications for these products will be included....

This presentation discusses Computer Aided Design (CAD) of a Nanofiltration Membrane System for Vero Beach, Florida. It provides a list of the NF System Design Criteria including the Plant Capacity, Permeate Capacity per Train, Design Recovery per Train and Maximum Transmembrane Pressure Loss. It also provides some performance evaluation resul...

The purpose of this paper is to introduce and demonstrate the unique technology of ozone pretreatment for ultrafiltration (UF) and reverse osmosis (RO) membranes and the stable operating performance of the membrane filtration plant. The ozone adjustment proves to have good tolerance towards the fluctuation of the iron and manganese issues associat...

This paper describes the use of an integrated membrane system consisting Ultrafiltration (UF) and Reverse Osmosis (RO) filters treating raw river water that has been optimized by improving the operating sequence and cleaning conditions. The combined membrane process treats challenging surface water from Llobregat River (Barcelona, Spain) with occa...

In an advanced water reuse application, reverse osmosis (RO) technology serves a critical role. This paper reviews the benefits of operating high performance RO membranes, and the obstacles associated with delivering those benefits through the operation of the Orange County Water District?s (OCWD) Groundwater Replenishment System (GWRS). Perform...

Three of the most common membrane filtration products are offered as a proprietary system design which has limited interchangeability when membranes are replaced. Original Equipment Manufacturers have increased their participation in the low pressure membrane market using modules manufactured by different membrane manufacturers. Two approaches for ...

Paper presents results of 3 pilot studies demonstrating ultrafiltration (UF) as a feasible technology alternative to conventional coagulation/filtration for treating surface water for potable use. All three case studies involve existing plants in S?o Paulo State Brazil. Case 1: Alto Cotia water from Gra?a Reservoir - color, haloacetic aci and TOC t...

Biofouling in reverse osmosis (RO) elements is the phenomenon by which bacteria settles in the feed channel of an element and starts building a biofilm. The biofilm evolution causes an exponential increase of the feed-concentrate pressure drop (dP) in the RO system. This dP rise results in a higher energy consumption and the need to conduct clean-i...

Ultrafiltration/Microfiltration (UF/MF) plants can operate on feedwater from well water to surface water and even on wastewater sources. The advancement of today?s UF/MF technology has allowed water treatment plants to operate successfully on different water sources, each with a unique set of benefits and challenges. In this talk, numerous case s...

Advancements in technology and manufacturing have brought reverse osmosis and nanofiltration membranes to the forefront in many of today's filtration processes. New technologies and applications promise to expand this role even futher. In this talk, we provide a perspective on the future challenges and applications for membrane filtration and the ...