Cleaning an RO system is recommended when fouling is detected through a decrease in permeate flow, quality, or increase in pressure drop, or prior to long shutdowns. Fouling can include scale, metals, silica, colloids, organics, or biological material. The proper cleaning method depends on the foulants present and may require low and high pH chemicals in sequence. A well-designed cleaning skid is needed to introduce chemicals and rinse the system. The process involves flushing, cleaning chemical contact, optional soaking, and rinsing stages to restore performance while protecting the membrane from harm. Seeking expert guidance can help optimize cleaning for difficult cases.
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
John Dunford - Bond Water Technologies - Dissolved Air Flotation (DAF) Over...Jim Clarke
John Dunford - Bond Water Technologies - Dissolved Air Flotation (DAF) Overview & Optimization Presentation At The 32nd Annual Waste & Pretreatment Conference In Charlottesville, VA March 2016
Heat Exchanger Deposits Removed With Tech Sonic CleaningSam Mah
This case study details how ultrasonic technology has been used for cleaning refinery and chemical plant components since 2003. The use of large-scale ultrasonic systems for cleaning heat exchangers was developed in 2009 to extend the benefits of Tech Sonic ultrasonic cleaning to the energy-critical heat exchange elements of refining and chemical production.
To learn more, download this Tech Sonic case study.
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
John Dunford - Bond Water Technologies - Dissolved Air Flotation (DAF) Over...Jim Clarke
John Dunford - Bond Water Technologies - Dissolved Air Flotation (DAF) Overview & Optimization Presentation At The 32nd Annual Waste & Pretreatment Conference In Charlottesville, VA March 2016
Heat Exchanger Deposits Removed With Tech Sonic CleaningSam Mah
This case study details how ultrasonic technology has been used for cleaning refinery and chemical plant components since 2003. The use of large-scale ultrasonic systems for cleaning heat exchangers was developed in 2009 to extend the benefits of Tech Sonic ultrasonic cleaning to the energy-critical heat exchange elements of refining and chemical production.
To learn more, download this Tech Sonic case study.
The presentation has prepared as per the syllabus of Mumbai University.
Go through the presentation, if you like it then share it with your friends and classmates.
Thank you :)
This is the an excerpt for a process description of my 2010 AICHE National Student Design Competition Report. Note the detail in the piping and instrumentation diagrams coupled with the process description.
Clean in Place is a method of cleaning the interior surfaces of process equipment and fittings, without disassembling them. Industries that rely heavily on CIP are those requiring high levels of hygiene, i.e. dairy, beverage, brewing, processed foods, pharmaceutical, and cosmetics and CIP is an integral part of automated industry. CIP is concerned with the removal of soil that can cause damage to quality of the final product being processed. CIP method highly depends on type of soil or food residue to be cleaned. Every industry has their own type of soil depending upon the product being processed. And hence it is recommended to have CIP Process to be designed accordingly. Selection of chemicals and their strength, chemistry of product and its interaction with different solutions, time of interaction of chemicals with process
line etc. are to be considered while designing the CIP line. Soil also differ in nature; it can either be simple water soluble or can be water insoluble. Water soluble one’s are easy to clean as simple flush of water can dissolve them. Water insoluble soils are hard to tackle as they are again divided into organic and inorganic soils. Organic ones include fats, oils, grease, proteins, starch, and carbohydrates. Inorganic soils include minerals, salt deposits, millstones etc. CIP performs in two ways: - Single use cleaning CIP and recovery CIP. Single use cleaning is for that industries where the line gets way too dirty and chemicals once used can’t be further used due to high soil contamination in the chemical solution, but it is to be noted that they can be highly
costly as new chemicals are to be used every time and they can have high environmental load as it is disposed and drained after every CIP Cycle. In Recovery CIP the process line is not so filthy and hence the chemicals can be collected and reused, though the equipment for recovering cleaning solution is more expensive.
Redesigned Filter Capsule Improves Final Filtration Assembly Design and Opera...MilliporeSigma
This application note describes testing performed to assess volume loss in SURF assemblies and shows how both assembly design and filtration operations can be adapted to minimize volume and product loss in the system.
The presentation has prepared as per the syllabus of Mumbai University.
Go through the presentation, if you like it then share it with your friends and classmates.
Thank you :)
This is the an excerpt for a process description of my 2010 AICHE National Student Design Competition Report. Note the detail in the piping and instrumentation diagrams coupled with the process description.
Clean in Place is a method of cleaning the interior surfaces of process equipment and fittings, without disassembling them. Industries that rely heavily on CIP are those requiring high levels of hygiene, i.e. dairy, beverage, brewing, processed foods, pharmaceutical, and cosmetics and CIP is an integral part of automated industry. CIP is concerned with the removal of soil that can cause damage to quality of the final product being processed. CIP method highly depends on type of soil or food residue to be cleaned. Every industry has their own type of soil depending upon the product being processed. And hence it is recommended to have CIP Process to be designed accordingly. Selection of chemicals and their strength, chemistry of product and its interaction with different solutions, time of interaction of chemicals with process
line etc. are to be considered while designing the CIP line. Soil also differ in nature; it can either be simple water soluble or can be water insoluble. Water soluble one’s are easy to clean as simple flush of water can dissolve them. Water insoluble soils are hard to tackle as they are again divided into organic and inorganic soils. Organic ones include fats, oils, grease, proteins, starch, and carbohydrates. Inorganic soils include minerals, salt deposits, millstones etc. CIP performs in two ways: - Single use cleaning CIP and recovery CIP. Single use cleaning is for that industries where the line gets way too dirty and chemicals once used can’t be further used due to high soil contamination in the chemical solution, but it is to be noted that they can be highly
costly as new chemicals are to be used every time and they can have high environmental load as it is disposed and drained after every CIP Cycle. In Recovery CIP the process line is not so filthy and hence the chemicals can be collected and reused, though the equipment for recovering cleaning solution is more expensive.
Redesigned Filter Capsule Improves Final Filtration Assembly Design and Opera...MilliporeSigma
This application note describes testing performed to assess volume loss in SURF assemblies and shows how both assembly design and filtration operations can be adapted to minimize volume and product loss in the system.
Drain Safe Products: They’re Waste Water Compliant, Right? Wrong!William Shorter
Drain Safe Products: They’re Waste Water Compliant, Right? Wrong!
The purpose of this presentation is to offer a practical guide to screen printers on some of the issues related to screen making chemicals and how they can impact waste water.
This presentation was done at the FESPA UK Fabric Printing Now Conference & Printwear & Promotion Live 2016 during the Screen Printing Workshops.
The water to be used for the preparation of haemodialysis fluids needs treatment to achieve the appropriate quality. The water treatment is provided by a water pre-treatment system which may include various components such as sediment filters, water softeners, carbon tanks, micro-filters, ultraviolet disinfection units, reverse osmosis units, ultrafilters and storage tanks. The components of the system will be determined by the quality of feed water and the ability of the overall system to produce and maintain appropriate water quality.
This PPT dicusses about the Stirred Tank Bioreactor and its features mainly used in Fermentation process.
Useful for students doing their Bachelor's in Life Science
Water Consumption of Industrial Steam Cleaners: What to KnowPure Steam Cleaners
In the bustling world of industrial cleaning, the efficiency and sustainability of equipment are paramount. One crucial aspect that often takes the back seat in discussions is the water consumption of industrial steam cleaners. In this article, we delve into the depths of what every industry professional should know about the water consumption of these powerful machines.
Ammonia Plant Technology
Pre-Commissioning Best Practices
GBHE-APT-0102
PICKLING & PASSIVATION
CONTENTS
1 PURPOSE OF THE WORK
2 CHEMICAL CONCEPT
3 TECHNICAL CONCEPT
4 WASTES & SAFETY CONCEPT
5 TARGET RESULTS
6 THE GENERAL CLEANING SEQUENCE MANAGEMENT
6.6.1 Pre-cleaning or “Physical Cleaning
6.6.2 Pre-rinsing
6.6.3 Chemical Cleaning
6.6.4 Critical Factors in Cleaning Success
6.6.5 Rinsing
6.6.6 Inspection and Re-Cleaning, if Necessary
7 Systems to be treated by Pickling/Passivation
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.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
Cleaning your ro
1. Wayne T. Bates
Cleaning Your RO
Eventually the day comes when your RO system will require cleaning. Cleaning is
recommended when your RO shows evidence of fouling, just prior to a long term
shutdown, or as a matter of scheduled routine maintenance. Fouling characteristics
that signal you need to clean are a 10-15% decrease in normalized permeate flow, a
10-15% decrease in normalized permeate quality, or a 10-15% increase in
normalized pressure drop as measured between the feed and concentrate headers.
RO cleaning frequency due to fouling will vary by site. A rough rule of thumb as to an
acceptable cleaning frequency is once every 3 to 12 months. If you have to clean
more than once a month, you should be able to justify further capital expenditures for
improved RO pretreatment or a re-design of the RO operation. If cleaning frequency is
every one to three months, you may want to focus on improving the operation of your
existing equipment but further capital expenditure may be harder to justify.
One RO design feature that is commonly over-looked in reducing RO cleaning
frequency is the use of RO permeate water for flushing foulants from the system.
Soaking the RO elements during standby with permeate can help dissolve scale and
loosen precipitates, reducing the frequency of chemical cleaning.
What you clean for can vary site by site depending on the foulant. Complicating the
situation frequently is that one more than one fulant can be present. Typical foulants
are:
• Calcium carbonate scale
• Sulfate scale of calcium, barium or strontium
• Metal oxides of iron, manganese, aluminum, etc.
• Silica scale
• Colloidal deposits (inorganic or mixed inorganic/organic)
• Organic material of natural origin or man-made origin
• Biological (bioslime, mold, or fungi)
There are a number of factors involved in the selection of a suitable cleaning chemical
(or chemicals) and proper cleaning protocol. The first time you have to perform a
cleaning, it is recommended to contact the manufacturer of the equipment, the RO
2. element manufacturer, or a RO specialty chemical supplier. Once the suspected
foulant(s) are identified, one or more cleaning chemicals will be recommended.
These chemical(s) can be generic and available from a number of suppliers or can
be private-labeled proprietary cleaning solutions. The proprietary solutions can be
more expensive but may be easier to use and you cannot rule out the advantage of the
intellectual knowledge supplied by these companies. An invaluable service offered by
some service companies is that they will determine the proper cleaning chemicals
and protocol by testing at their facility an element pulled from your system.
It is not unusual to have to use a number of different cleaning chemicals in a specific
sequence to achieve the optimum cleaning. There are times that a low pH cleaning is
used first to remove foulants like mineral scale, followed by a high pH cleaning to
remove organic material. However, there are times that a high pH cleaning is used
first to remove foulants like oil followed by a low pH cleaning. Some cleaning
solutions have detergents added to aid in the removal of heavy biological and organic
debris, while others have a chelating agent like EDTA added to aid in the removal of
colloidal material, organic and biological material, and sulfate scale. An important
thing to remember is that the improper selection of a cleaning chemical or the
sequence of chemical introduction can make the foulant worse.
There are a number of precautions in cleaning chemical selection and usage for a
composite polyamide membrane:
• Follow the manufacturer s recommended chemical list, dosage, pH, temperature
and contact time guidelines.
• Use the leash harshest chemical cleaning to get the job done. This will optimize
the useful life of the membrane.
• Be prudent in the adjustment of pH at the low and high pH range to extend the
useful life of the membrane. A gentle pH range is 4 to 10, while the harshest is 2
to 12.
• Don t mix acids with caustics. Thoroughly rinse the 1st cleaning solution from the
system before introducing the next solution.
• Flush out detergents with high pH permeate
• Verify that proper disposal requirements for the cleaning solution are followed.
If your system has been fouled biologically, you may want to consider the extra step of
introducing a sanitizing biocide chemical after a successful cleaning. Biocides can
be introduced immediately after cleaning, periodically (e.g. once a week), or
continuously during service. You must be sure however that the biocide is compatible
with the membrane, does not create any health risks, is effective in controlling
biological activity, and is not cost prohibitive.
The successful cleaning of an RO on-site requires a well designed RO cleaning skid.
Normally this skid is not hard piped to the RO skid and uses temporary hosing for
connections. It is recommended to clean a multi-stage RO one stage at a time to
optimize crossflow cleaning velocity. The source water for chemical solution make up
3. and rinsing should be RO permeate, DI water or at least soft water. Components
must be corrosion proof. Major cleaning system components are:
• RO Cleaning Tank: This tank needs to be sized properly to accommodate the
displacement of water in the hose, piping, and pressure vessels. The tank should
be designed to allow 100 % drainage, easy access for chemical introduction and
mixing, a recirculation line from the RO Cleaning Pump, proper venting, overflow,
and a return line located near the bottom to minimize foam formation when using a
surfactant.
• RO Cleaning Pump: This pump needs to be sized to develop the proper crossflow
velocity to scrub the membrane clean. The cleaning rate for a 8-inch diameter
vessel is 30 to 40 gpm and for a 4-inch diameter vessel is 8 to 10 gpm. The
maximum recommended pressure is 60 psi to minimize the production of
permeate during cleaning and reduce the convective redeposition of foulant back
on to the membrane surface.
• RO Cleaning Cartridge Filter: Normally 5 to 10-micron and is designed to remove
foulants that have been displaced from the cleaning process.
• RO Tank Heater or Cooler: The optimal temperature for cleaning is 35 to 45
o
C.
One cannot forget that heat is generated and imparted by the RO Cleaning Pump
during recirculation.
• RO Tank Mixer: This is recommended to get optimal mixing of chemical, though
some designers rely solely on the slow introduction of chemical while maintaining
a recirculation through the RO Cleaning Pump back to the tank.
• Instrumentation: Cleaning system instrumentation should be included to monitor
flow, temperature, pressure, and tank level.
• Sample Points: Sample valves should be located to allow pH and TDS
measurements off the RO Cleaning Pump discharge and the concentrate side
recirculation return line.
• Permeate Return Line: A small amount of the cleaning solution can permeate
through the membranes and so a permeate side return line is recommended.
RO cleaning procedures may vary dependent on the situation. The time required to
clean a stage can take from 4 to 8 hours., The basic steps of cleaning are:
1. Perform a low pressure flush with feed or permeate water to remove service
concentrate and foulants.
2. Make up the cleaning solution per the manufacturer s instructions.
3. Introduce the cleaning solution to the first stage for 60 minutes. You may want to
throttle the flow up slowly to minimize the plugging of the feed path with dislodged
foulant. Send the displaced water and up to 20% of the fouled cleaning solution to
drain before returning the cleaning solution back to the RO Cleaning Tank.
Readjust the pH to the target when it changes more than 0.5 pH units.
4. An optional soak and recirculation sequence can be used. The soak time can be
from 1 hour to overnight depending on the manufacturer s recommendations, but
be cautious that the proper temperature and pH be maintained and that this does
increase the chemical exposure time of the membrane.
5. A low pressure Cleaning Rinse with permeate water is required to remove all
traces of chemical from the Cleaning Skid and the RO Skid.
4. 6. Once all the stages of a train are cleaned, the RO can be placed back into service.
It is not unusual for it to take from a few hours to a few days for the RO permeate
quality to stabilize, especially after high pH cleanings.
It is exciting to have a successful cleaning and watch your pressures and permeate
quality improve. On the flip side it is frustrating to have an unsuccessful cleaning,
though its no reason to become suicidal. If the cleaning did not provide the results
you were hoping for, you may want to consider talking to those suppliers who offer off-
site services rather than proceed with a trial-and-error approach on site. Pull one or
two elements from the front or back end and ship them to a service company. A
service company can determine the optimal cleaning procedure and also report how
effective the cleaning was in restoring flow and salt rejection.