scholarly journals Evaluation of Water Quality by the Modified SDI in the Membrane Filtration Process

MEMBRANE ◽  
2009 ◽  
Vol 34 (2) ◽  
pp. 94-103 ◽  
Author(s):  
Kanji Matsumoto ◽  
Miysuharu Furuichi ◽  
Kazuho Nakamura ◽  
Tadashi Nittami
Keyword(s):  
Water Quality ◽  
Membrane Filtration ◽  
Filtration Process

Screening optimisation for indirect potable reuse

2011 ◽  
Vol 63 (12) ◽  
pp. 2846-2852 ◽  
Author(s):  
J. W. Hatt ◽  
S. J. Judd ◽  
E. Germain
Keyword(s):  
Water Quality ◽  
Membrane Filtration ◽  
Mesh Size ◽  
Water Volume ◽  
Filtration Process ◽  
Biofilm Growth ◽  
Potable Reuse ◽  
Membrane Performance ◽  
Pre Treatment ◽  
Filter Fouling

An automatic backflush pre-filter used for pre-treatment for secondary wastewater re-use was evaluated and optimised at two different mesh sizes over an 18 month period. The filter was initially run with a 500 μm rating mesh size, as recommended by the supplier of the downstream membrane filtration process, and then at 100 μm to investigate any change in water quality produced and associated improved membrane performance. With the 500 μm mesh in place, the filter fouling rate was low and a backflush was initiated every 3.5 h. For the 100 μm mesh the fouling rate was extremely rapid. Fouling was found to be caused by reverse side blockage of the pre-filter due to biofilm growth, and not by improved solids capture; there was no improvement in water quality with the smaller mesh size, since particle unloading from the biofilm took place. The pre-filter fouling rate was found to be related to turbidity. At a turbidity of 5 NTU the filter backflushed around 200 times per day, while at 10 NTU this increased to over 300 times. Further analysis enabled the backflush water volume to be decreased by reducing the backflush duration and increasing the backflush cycle time (i.e. the time between backflushes).

Leading the City of Baltimore into the 21st Century: Flexible Treatment Solutions and Integrated Raw Water Management

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
J. L. Manuszak ◽  
M. MacPhee ◽  
S. Liskovich ◽  
L. Feldsher
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Water Supply ◽  
Conceptual Design ◽  
Membrane Filtration ◽  
Treatment Plant ◽  
Low Pressure ◽  
Management Tool ◽  
Raw Water ◽  
The City

The City of Baltimore, Maryland is one of many US cities faced with challenges related to increasing potable water demands, diminishing fresh water supplies, and aging infrastructure. To address these challenges, the City recently undertook a $7M study to evaluate water supply and treatment alternatives and develop the conceptual design for a new 120 million gallon per day (MGD) water treatment plant. As part of this study, an innovative raw water management tool was constructed to help model source water availability and predicted water quality based on integration of a new and more challenging surface water supply. A rigorous decision-making approach was then used to screen and select appropriate treatment processes. Short-listed treatment strategies were demonstrated through a year-long pilot study, and process design criteria were collected in order to assess capital and operational costs for the full-scale plant. Ultimately the City chose a treatment scheme that includes low-pressure membrane filtration and post-filter GAC adsorption, allowing for consistent finished water quality irrespective of which raw water supply is being used. The conceptual design includes several progressive concepts, which will: 1) alleviate treatment limitations at the City's existing plants by providing additional pre-clarification facilities at the new plant; and 2) take advantage of site conditions to design and operate the submerged membrane system by gravity-induced siphon, saving the City significant capital and operations and maintenance (O&M) costs. Once completed, the new Fullerton Water Filtration Plant (WFP) will be the largest low-pressure membrane plant in North America, and the largest gravity-siphon design in the world.

Ammonia Removal from Raw Water by using Adsorptive Membrane Filtration Process

2021 ◽  
pp. 118757
Author(s):  
Rosiah Rohani ◽  
Izzati Izni Yusoff ◽  
Nadiah Khairul Zaman ◽  
Arshid Mahmood Ali ◽  
Nadiatul Atalia Balqis Rusli ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Ammonia Removal ◽  
Raw Water ◽  
Filtration Process ◽  
Adsorptive Membrane

scholarly journals A New Test of Filterability for Unprocessed Wines Evaluation of the Enzyme Efficiency

2021 ◽  
Vol 10 (2) ◽  
pp. 55-66
Author(s):  
Amélie Vallet-Courbin ◽  
Soizic Lacampagne ◽  
Rose Marie Canal-Llauberes ◽  
Sigolène Mattalana Malzieu ◽  
Tihomir Kanev ◽  
...  
Keyword(s):  
Suspended Matter ◽  
Measurement Method ◽  
Membrane Filtration ◽  
Enzyme Treatment ◽  
Filtration Process ◽  
Enzyme Efficiency ◽  
Different Types ◽  
Definition Of ◽  
Selection Of

A new Test of Filterability has been developed. Measurements carried out with different types of wines indicate that the new filterability index is a useful tool for understanding and predicting the propensity to fouling of treated or untreated wines, e.g. with or without enzyme addition. The measurement method used in the Test of Filterability, requires only one type of membrane for all types of wine, and uses the same equipment as the traditional Fouling Index. Numerous trials have demonstrated that the filtration of wines is governed by standard blocking law. The definition of the new Test of Filterability, based on this filtration law, is proposed. The choice of membrane and the selection of the optimal pore size were based on the results of the experiments. Current methods used for the determination of fouling properties in wine filtration have been developed for the membrane filtration of small quantities of suspended matter. Enzyme treatment is a process often used in wine clarification. The new Test of Filterability indicates the best conditions for the filtration of all types of wines. The test is easy to implement and has been validated with various wines. This new Test of Filterability is an important tool for winemakers as it constitutes a simplified test of a wine's filterability. The new test may also be used to determine the filtration process that is best adapted to each wine while reducing the number of operations. The same approach may be adopted for the filtration of other liquids. 

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