Development of a new integrity testing system

2003 ◽  
Vol 3 (5-6) ◽  
pp. 101-108 ◽  
Author(s):  
S.C.J.M. van Hoof ◽  
L. Broens ◽  
A. Nahrstedt ◽  
S. Panglisch ◽  
R. Gimbel
Keyword(s):  
Membrane Filtration ◽  
Potable Water ◽  
Challenge Test ◽  
Membrane Integrity ◽  
Testing System ◽  
Integrity Test ◽  
Integrity Testing ◽  
Pressure Test ◽  
On Line ◽  
Water Supply Company

As membrane filtration systems are more commonly used in the water treatment industry, the call for a reliable, fast and on-line integrity testing system becomes more urgent. Especially where membrane filtration is used in potable water production for the removal of pathogenic microorganisms, the integrity of such a system is of the utmost importance. Membrane integrity testing can be performed in a number of ways, where the pressure-hold or vacuum-hold test and the diffusive airflow test are well known. Although relatively widely applied in membrane plants worldwide, all of these methods exhibit major drawbacks like off-line testing and the lack of a direct relationship between the measured data and the removal efficiency (log-removal). To overcome the above mentioned drawbacks of conventional integrity testing systems, a new kind of integrity test, the Spiked Integrity Monitoring System or SIM®-System was developed by NORIT Membrane Technology in close co-operation with Water Supply Company North Holland and IWW Rhenish-Westphalian Institute for Water Research, which combines the accuracy of a challenge test with the speed of a pressure test, while keeping the system under test in operation.

“Jan-Lagrand” water treatment works: UF/RO from technological novelty to full size application

2002 ◽  
Vol 2 (5-6) ◽  
pp. 285-291
Author(s):  
F. de Bruijn ◽  
C. Kamp ◽  
D. Eddy ◽  
J.E. Kools
Keyword(s):  
Water Treatment ◽  
System Development ◽  
Membrane Integrity ◽  
Conceptual System ◽  
Full Size ◽  
Integrity Testing ◽  
On Line ◽  
Membrane Pretreatment ◽  
Research And Design ◽  
Chemical Disinfection

In Heemskerk the world's largest dual membrane municipal water treatment works ( WTW) “Jan-Lagrand” (55 Ml/d or 2,250 m3/h or approximately 15 MGD) was commissioned at the end of 1999. At Heemskerk WTW, pretreated surface water is subsequently treated by ultrafiltration (UF) and reverse osmosis (RO). The RO permeate is directly blended into drinking water without chemical disinfection. Before Heemskerk the dual membrane concept had not been considered on this scale, and during project preparation numerous developments and innovations needed to be flexibly accommodated into the ongoing design. Conceptual system development, pilot research and design and engineering were successfully conducted “in parallel”. This paper deals with the innovations that were materialized in Heemskerk, e.g. UF-membrane pretreatment, on line membrane integrity testing (UF and RO) for disinfection approval, and a dual floor building concept for membrane installations. This paper explains how these innovations could be accommodated into an ongoing design, while innovative testing was still proceeding.

Experiences in integrity testing ultrafiltration membranes at a large potable water treatment works

2003 ◽  
Vol 3 (5-6) ◽  
pp. 1-7
Author(s):  
S. Oxtoby
Keyword(s):  
Water Treatment ◽  
Membrane Filtration ◽  
Membrane System ◽  
Primary System ◽  
Secondary System ◽  
Ultrafiltration Membranes ◽  
Integrity Testing ◽  
Particulate Loads ◽  
Integrity Tests ◽  
The Uk

The Clay Lane Water treatment works of Three Valleys Water, in the south east of England, is currently the world’s largest ultrafiltration works with a capacity of 160 Ml/d. It utilises ultrafiltration membranes constructed as hollow fibres with a number of membrane elements in a pressure housing. The plant has been operating since spring 2001. The decision to install the system was made in anticipation of the introduction of tighter regulations on Cryptosporidium in water supplies in the UK. Once a decision was made to proceed with a membrane system the ability to monitor the integrity of the system and to repair problems became a crucial design parameter that was a critical part of membrane selection. The need to include a system affected the design of the filtration units offered by manufacturers. The available systems for integrity testing are reviewed and the reasons for selecting the system adopted are discussed. These include particle counting and the dosing of test particulate loads. The different forms of air passage integrity tests are discussed and the displaced air flow system used is described. Once a failure has been detected it must be traced so that the fault can be repaired. This procedure is described together with the techniques of pin repair of damaged fibres. At Clay Lane and other membrane filtration sites the backwash water from membrane cleaning is recovered using a secondary membrane system. Currently the secondary system operates in the same integrity testing regime as the primary system and the secondary filtrate is returned ahead of the primary membrane system. The relative merits of this system, or the alternative of adding the recovered water to the filtrate are discussed.

Disquisition of Testing System for BMBS Vacuum Booster

2012 ◽  
Vol 190-191 ◽  
pp. 1351-1354
Author(s):  
Yan Shi ◽  
Yi Lu ◽  
Xue Ying Wang
Keyword(s):  
High Speed ◽  
Computer Control ◽  
Performance Testing ◽  
Test System ◽  
Testing System ◽  
Test Items ◽  
Sealing Performance ◽  
On Line ◽  
High Speed Data ◽  
Line Test

To solve the problem of testing BMBS (BLOW-OUT MONITORING AND BRAKE SYSTEM) vacuum booster performance, a double-station and on-line test system for BMBS vacuum booster was designed. It adopts high-speed data collection method and computer control technology. This system can test the performance in non-BMBS condition and BMBS condition. The test items mainly include dynamic characteristic and sealing performance under each condition. The double stations are independent and have no interference with each other. The system fills up the blank of performance testing about BMBS vacuum booster. To verify this system, experiments were conducted with the vacuum booster which installed the BMBS technology. The experiment results show that the system can do well in testing the performance of BMBS vacuum booster in high precision. The sealing performance resolution is 0.01kPa and the pressure resolution is 1N.

Research experiences in direct potable water treatment using coagulation/ultrafiltration

2005 ◽  
Vol 51 (6-7) ◽  
pp. 221-229 ◽  
Author(s):  
A. Lerch ◽  
S. Panglisch ◽  
R. Gimbel
Keyword(s):  
Membrane Filtration ◽  
Potable Water ◽  
Research Experiences ◽  
Dead End ◽  
New Concepts ◽  
Capillary Membranes ◽  
Pre Treatment ◽  
High Flexibility ◽  
Theoretical Considerations ◽  
Potable Water Treatment

Recently, new concepts for direct or pre-treatment minimised processes for the treatment of surface waters to potable water have aroused more and more interest. The requirements of such concepts are various and express the desire for high flexibility, adaptation on various water qualities and expandability of the treatment process. These requirements can be nearly ideally achieved by membrane technology. This publication presents the actual approach in research, piloting and operation of selective plants, research institutions and universities for the hybrid process coagulation/ultrafiltration (UF), or microfiltration (MF) respectively. The focus is set on the discussion of the influences of the mass freight, coagulation conditions, temperature and theoretical considerations about the coating layer build-up in dead-end and IN/OUT-mode driven MF and UF capillary membranes with a coagulation step prior to membrane filtration.

scholarly journals Could the miraculous springs in the Pardubice region be used as drinking water sources?

2012 ◽  
Vol 29 (Special Issue) ◽  
pp. S109-S114
Author(s):  
M. Pejchalová ◽  
P. Hanzalová ◽  
R. Metelka ◽  
J. Vytřasová
Keyword(s):  
Membrane Filtration ◽  
Potable Water ◽  
Coliform Bacteria ◽  
E Coli ◽  
Quantification Method ◽  
Alternative Cultivation ◽  
Microbiological Analyses ◽  
Filtration Technique ◽  
Intestinal Enterococci

Selected springs in the Pardubice Region were repeatedly examined for analytical and microbiological indicators. Microbiological analyses included the determination of intestinal enterococci, coliform bacteria, E. coli, and the number of colonies cultivated at temperature form 22&deg;C to 36&deg;C. The analyses were carried out according to the relevant CSN ISO norms using the membrane filtration technique and also the alternative cultivation method Colilert<sup>&reg;</sup>/Quanti-Tray 2000<sup>&reg;</sup> quantification method using the defined substrate technology. Out of 11 wells and springs examined, only two satisfied the requirements for potable water with all indicators observed.

scholarly journals Advantages of the experimental animal hollow organ mechanical testing system for the rat colon rupture pressure test

2013 ◽  
Vol 11 (10) ◽  
pp. 1110-1113 ◽  
Author(s):  
Chengdong Ji ◽  
Xuan Guo ◽  
Zhen Li ◽  
Shuwen Qian ◽  
Feng Zheng ◽  
...  
Keyword(s):  
Mechanical Testing ◽  
Experimental Animal ◽  
Rat Colon ◽  
Testing System ◽  
Pressure Test ◽  
Hollow Organ ◽  
Rupture Pressure

The Research on the Winding Deformation Testing System for 10kV Transformer Based on the LabVIEW

2014 ◽  
Vol 556-562 ◽  
pp. 2137-2140
Author(s):  
Hai Sheng Yang ◽  
Ling Liu ◽  
Cheng Jie Shi ◽  
Tao Chen ◽  
Yan Bo Wang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Development Process ◽  
Analysis Data ◽  
Response Analysis ◽  
Testing System ◽  
Frequency Response Analysis ◽  
Paper Briefly ◽  
On Line ◽  
Signal Injection

In order to discover the hidden trouble of the 10kV transformer, in this paper, on-line monitoring system based on LabVIEW is developed. The paper briefly introduces the basic concept of the virtual instrument and the frequency-response analysis (FRA), and then it expounds the development process of the hardware and software of this system. The hardware performs the main functions: signal injection, filtering, amplifying, signal conditioning, and storing the result in computer. The software includes four modules: user login, data acquisition, data analysis, data query. Finally, the monitoring system is validated by a corresponding experimental study.

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