This document provides an overview of cleaning reverse osmosis and nanofiltration membrane elements. It discusses common types of fouling and scaling like carbonate, sulfate, organic and biological, and recommends appropriate cleaning methods. Cleaning solutions may include acids, bases, chelating agents and detergents. The document outlines the cleaning process, safety procedures, and recommends feed flow rates during cleaning based on element size and pressure. The goal of cleaning is to remove buildup and restore membrane performance by reducing pressure and increasing permeate flow.
In this presentation, we tried to cover all the information regarding Reverse Osmosis technology. We have discussed its different types, major parts of Reverse Osmosis i.e Activated Carbon Bed, Ion Exchange Unit, Cartridge Filter and then at the end design steps of Reverse Osmosis.
In this presentation, we tried to cover all the information regarding Reverse Osmosis technology. We have discussed its different types, major parts of Reverse Osmosis i.e Activated Carbon Bed, Ion Exchange Unit, Cartridge Filter and then at the end design steps of Reverse Osmosis.
Presentation on Reverse Osmosis including Process
Osmosis,Reverse Osmosis,Uses of RO Technology,Removal,Advantages,Disadvantage, by Rahul Rathod, Nagpur
Reverse Osmosis module design and engineering emerged with membrane technology
evolution. In order to understand module design, first membrane configuration needs to be
explored, since the module design is always tailored according to the membrane
characteristics. There is a significant difference between membrane chemistries (most
important ones being cellulose acetate and thin film composite with polyamide barrier
layer), and more importantly, between the different membrane configurations (hollow fine
fiber and flat sheet). Therefore, before looking into detail on the module configuration, the
membrane development needs to be considered.
Colloidal and Particulate Fouling ,The source of silt or colloids in reverse osmosis feed waters often includes : bacteria, clay , colloidal silica, iron corrosion products .
Methods to prevent colloidal fouling: Media Filtration ,Oxidation–Filtration ,Coagulation-Flocculation ,Microfiltration/Ultrafiltration
,Cartridge Microfiltration ,Antifoulants
Green Method Engineering (GME) is a reputed wastewater management company in Kerala who uses the advanced purification technology like MBBR for the wastewater treatment.
Dissolved Air Flotation is a Wastewater Treatment technology that removes harmful impurities from industrial, commercial, & residential wastewater through air pressure and makes it usable for other purposes...know more: https://kelvinindia.in/dissolved-air-flotation
Dissolve air flotation technology to treat highly polluted wastewaterIndia Water Portal
Air flotation technology has proved to be an efficient method to treat heavily polluted wastewater from tanneries, slaughterhouses and chemical industries
Water Purifiers and RO Plant By Valency Enterprises Pvt. Ltd, Nagpur indiamartsupplier
Established in the year 2014, Valency Enterprises Pvt. Ltd. is considered amongst the praiseworthy manufacturer, supplier and service provider of an exceptional quality collection of Water Purifiers, RO Plant, RO Spare Parts, Water Chiller, DM Plant, Air Freezer, Water Softener Plant, Water Cooler, Bottling Plant, RO Repairing Service, RO Installation Service and RO AMC Service.
Presentation on Reverse Osmosis including Process
Osmosis,Reverse Osmosis,Uses of RO Technology,Removal,Advantages,Disadvantage, by Rahul Rathod, Nagpur
Reverse Osmosis module design and engineering emerged with membrane technology
evolution. In order to understand module design, first membrane configuration needs to be
explored, since the module design is always tailored according to the membrane
characteristics. There is a significant difference between membrane chemistries (most
important ones being cellulose acetate and thin film composite with polyamide barrier
layer), and more importantly, between the different membrane configurations (hollow fine
fiber and flat sheet). Therefore, before looking into detail on the module configuration, the
membrane development needs to be considered.
Colloidal and Particulate Fouling ,The source of silt or colloids in reverse osmosis feed waters often includes : bacteria, clay , colloidal silica, iron corrosion products .
Methods to prevent colloidal fouling: Media Filtration ,Oxidation–Filtration ,Coagulation-Flocculation ,Microfiltration/Ultrafiltration
,Cartridge Microfiltration ,Antifoulants
Green Method Engineering (GME) is a reputed wastewater management company in Kerala who uses the advanced purification technology like MBBR for the wastewater treatment.
Dissolved Air Flotation is a Wastewater Treatment technology that removes harmful impurities from industrial, commercial, & residential wastewater through air pressure and makes it usable for other purposes...know more: https://kelvinindia.in/dissolved-air-flotation
Dissolve air flotation technology to treat highly polluted wastewaterIndia Water Portal
Air flotation technology has proved to be an efficient method to treat heavily polluted wastewater from tanneries, slaughterhouses and chemical industries
Water Purifiers and RO Plant By Valency Enterprises Pvt. Ltd, Nagpur indiamartsupplier
Established in the year 2014, Valency Enterprises Pvt. Ltd. is considered amongst the praiseworthy manufacturer, supplier and service provider of an exceptional quality collection of Water Purifiers, RO Plant, RO Spare Parts, Water Chiller, DM Plant, Air Freezer, Water Softener Plant, Water Cooler, Bottling Plant, RO Repairing Service, RO Installation Service and RO AMC Service.
Ro plant Manufacturers in Chennai, Bangalore, Hyderabad, Cochin, Indiaammaqua
The Top Roofing contractors in Chennai are Sole Proprietorship (Individual) based firm, engaged as the trader and wholesaler of Roofing Contractors, Roofing Shed, Terrace Roofing and many more. Our Unique Selling Point is providing the best quality and Durable Goods in Reasonable Price.
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This presentation talks about the first commercial membranes starting in the 1960's and then moves on to discuss how membranes work and the processes required to clean them.
Established in 1997, we, RO Plant Solutions, are engaged in the manufacturing, supplying & trading of a comprehensive range of Water Plant, Filling Machine & Lab Equipment. We also provide Contract Maintenance Service. Our wide range also includes ISI Mineral Water Plant, Industrial Filling Machine & Water Treatment Plant. Our team of professionals works in great coordination among themselves to meet all the desired goals on due time. Our offered products have gained huge appreciation by our clients due to the various features such as high durability, sturdy construction, superior quality, reliable performance and long service life.
Plan an ETP with detail process discussion following the instructionsMd Fahimuzzaman
Effluent is the stream of excess chemical liquor from an industry after using in original operation. For example, the excess dye liquor extracted from the textile industry after dyeing is an effluent of that dyeing industry. Effluent Treatment Plant or ETP is a waste water treatment method which is particularly designed to purify industrial waste water for its reuse and it’s aim is to release safe water to environment from the harmful effect caused by the effluent. Textile industry uses numerous hazardous chemicals during processing such as heavy metals, salts, surfactants, sulphite, and formaldehyde, which can cause major pollution in the effluents’ receiving waters. Since textile waste water contains a diversity of impurities and therefore specific treatment technology called ETP is required. The ETP Plant works at various levels and involves various physical, chemical, biological and membrane processes to treat waste water from different industrial sectors like chemicals, drugs, pharmaceutical, refineries, dairy, ready mix plants & textile etc.
In this presentation, application of some parameters of water wwater analysis (i.e., Acidity, Sulfate, Volatile Acid,Nitrogen,greases and oils) , procedure to measure that parameter, environmental significance of that parameter and importance of that parameter in waste water analysis.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
3. Overview
Introductory Remarks
When to Clean
Cleaning Method Selection
Defining a Foulant and Scalant
pH and Temperature Limits
FT30 Resistance to Cleaning Agents
Cleaning Carbonate Scaling
Cleaning Sulfate Scaling
4. Overview (cont.)
Cleaning Organic Fouling
Cleaning Biological Fouling
Cleaning Iron Fouling
Cleaning Silt Fouling
Cleaning Carbon Fouling
Chemical Attack
Permeate Back Pressure
The Cleaning Process
Safety
5. Cleaning Introductory Remarks
Cleaning is a means of removing mineral scale, organic matter,
biological growth, colloidal particles, or insoluble constituents
which build up on the surface of the membrane
Frequent cleaning should not be required for a properly designed
and operated RO/NF system
Membranes may become fouled or scaled due to improper
operation or change in feedwater quality
6. Cleaning Introductory Remarks
(cont.)
Membranes’ elements can be cleaned effectively because:
chemical stability
broad pH tolerance
high temperature limits
Elements with oxidized membrane or mechanical damage must
be replaced
7. When to Clean
Normalized flow declines by 10%
Pressure drop increases by 15%
Normalized salt passage increases by 5%*
*Dependent on individual system design
8. Cleaning Regimen based on System
Performance and Water Chemistry
A wrong choice can aggravate a scaling/fouling
problem
Acids for scaling
Alkaline for biological fouling
Alkaline with detergent for organic fouling
Frequently both alkaline and acid cleanings are
required
9. Characterizing
Foulant or Scalant
Analyze the normalized plant performance
Analyze feed water quality
Check performance after previous cleanings
Analyze cartridge/SDI filter residue
10. Characterizing
Foulant or Scalant
Inspect lead element and feed scroll end for
suspended solids fouling
Inspect scroll of tail element for scaling
Clean and analyze cleaning solutions
(control samples required)
Destructive autopsy
11. pH Range and Temperature
Limits During Cleaning
Max Temp Max Temp Max Temp
50°C 35°C 30°C
pH Range pH Range pH Range
SW30/SW30HR 3 - 10 2 - 11 2 - 11.5
BW30/TW30 2 - 10 1 - 11 1 - 11.5
NF45 3 - 10 2 - 11 2 - 11
NF70 3 - 10 2 - 11 1 - 11.5
NF90 3 - 10 2 - 11 1 - 11.5
13. Causes:
High Hardness
High pH
High alkalinity
High recovery rates
Symptoms:
Heavy element
Low permeate flow
Poor salt rejection
High pressure drop
Carbonate Scaling
15. Sulfate Scaling
Causes
Exceeding solubility limits
Loss of antiscalant
High recovery rates (Means increase saturation
level than solubility product)
Symptoms
Heavy element
Low permeate flow
Poor salt rejection
High pressure drop
16. Sulfate Scaling (cont.)
Cleaning
Very difficult to clean
2.0(Wt)% Na-EDTA and 0.1(Wt)% NaOH at pH12, 30°C
maximum
Overnight soak/recirculation may be necessary--
reaction slow
17. Biological/Organic Fouling
Causes
Improper membrane preservation
Biological/Organic material in feedwater
Improper carbon bed maintenance
Symptoms
Odor
Moldy or discolored scroll end
Low permeate flow
High salt rejection
High pressure drop
18. Biological/Organic Fouling
(cont.)
Cleaning (best solution)
0.5% - 1.0%(Wt) Na-EDTA and 0.1%(Wt) NaOH
At pH 12 and < 30°C (86°F)
Cleaning (alternate solutions)
0.1% (Wt) NaOH and .05% Na-DSS at pH 12 and
< 30°C (86°F)
1.0% (Wt) STP and 1.0% (Wt) Na-EDTA or
1.0% (Wt) TSP and 1.0% (Wt) Na-EDTA
19. Iron Fouling
Causes
Rusty well casings or piping
Air with greater than 0.1 ppm Fe in feedwater
Symptoms
Rust coloring on scroll end or ATD*
Rusty colored concentrate upon start-up
Low permeate flow
Poor salt rejection
*Anti-telescoping device
23. Carbon Fouling
Causes
Incorrect backwash and rinse rates resulting
in inadequate flushing of carbon bed
Soft carbon
Symptoms
Black deposits on scroll end
Low permeate flow (early stage)
Poor salt rejection
25. Chemical Attack
Causes
Incomplete dechlorination (oxidation)
Exposure to strong oxidants
(i.e., permanganate)
Prolonged exposure to pH extremes
Symptoms
Very high permeate flow
Very poor salt rejection
Damage irreversible, elements must be replaced
26. Permeate Backpressure
Damage
Causes
Mechanical failure in system
Inappropriate design
Operation error
Symptoms
High permeate flow and very poor rejection
Evidence
Wrinkles in membrane near back glue line
Damage irreversible, elements must be replaced
27. Cleaning Process Steps
Mix cleaning solution
Low flow pumping (low psi)
Recycle
Soak
High flow pumping (low psi)
Flush out
Use permeate for solutions and flush
28. Recommend Feed Flow
Rate Per Pressure Vessel
Element Diameter Feed Pressure* Feed Flow
Rate
inches (psig) gpm
2.5 20-60 3-5
4 20-60 8-10
6 20-60 16-
20
8 20-60 30-
40*Dependent on number of elements in pressure vessel
29. Cleaning System
®
Permeate from
Storage Tank
Cleaning Tank Cartridge Filter RO Unit
Permeate to Storage Tank
(Normal Operation)
Permeate to
Cleaning Tank
(Cleaning Operation)
Concentrate to
Cleaning Tank
(Cleaning Operation)
Concentrate
to Drain
(Normal Operation)
30. Safety
Review MSDS documents
Use protective equipment:
goggles, gloves and clothing
Vent tanks and/or cleaning area
Assure chemical compatibility with system hardware
Dispose of spent solutions and chemicals accordance
with local regulations
Properly mix chemicals (i.e., acid into water, etc.)