Download product sheet Reverse Osmosis - Kurita Europe GmbH

water management
process management
Reverse Osmosis
Effective System Inventory
Trouble-free Operation
Antiscalants (Kurifloat
Series)
Biocides
Pretreatment
Cleaning of Membranes
Energy Considerations
All in one Hand
Consultancy is our Force
Effective System Inventory
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
Recently, reverse osmosis has been developing into one of the most important technologies
in the production of highly pure water for a variety of purposes. Whether for
the production of drinking water, the production of boiler feed water, the purification
of process water or for the production of highly pure water for the semiconductor
and pharmaceutical industry - nowadays in almost all branches of industry modern
reverse osmosis plants are used.
The final target is to run these plants under environmentally friendly and beneficial
economical conditions. Special attention is given to an efficient utilization of energy
as well as saving precious water.
Depending on the targeted application, reverse osmosis plants can process many
different types of impure water, such as for example surface water, well water, sea
water and waste water of many diverse origins. Each supply water possesses different
characteristics based its the composition of the organic and inorganic components.
With the knowledge of these components and by considering plant specific parameters
it is possible to develop an efficient and effective treatment concept achieving
an optimal economic operation and maximum operational reliability of a plant.
The high level of experience of our engineers, the special equipment of our laboratories,
our decades’-long world-wide company know-how as well as the uncompromising
quality of our products make Kurita one of the most competent partners for the
treatment and operation of your reverse osmosis plant.
A thorough understanding of the design and the operation of a RO plant is the basis
for a successful treatment concept! According to this principle, we perform the following
investigations in our scientific research laboratories:
Analysis of water and deposits
Autopsy of membranes
Flat sheet tests
Cleaning tests
Microscopic investigations
Surface analysis
Based on these comprehensive preliminary investigations it is possible to select the
most suitable biocides, antiscalants and cleaning chemicals and, thus, to operate a
plant in an economical and environmental friendly way.
www.kurita.de

water management
process management
Trouble-free Operation
Antiscalants (Kurifloat
Series)
Biocides
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
Regular monitoring of the operational performance of the plant as well as performing
regular maintenance are basic conditions for a trouble-free operation. One of the
main goals for trouble-free operation is to effectively protect the membranes against
fouling and scaling. This is to maximize the life span and run length of the membranes.
Our research and development activities have resulted in a complete line-up of
many diverse antiscalants in order to prevent all types of possible scaling on the
membranes effectively. We have directed our special attention to the selection of the
most suitable antiscalant for each specific application and supply water quality. Our
antiscalants offer excellent inhibiting effects for:
Colloids and suspended matter
Iron and manganese
Calcium carbonate
Calcium sulfate
Strontium sulfate
Barium sulfate
Silicate
Our product portfolio contains antiscalants with NSF-certification.
Biological, organic and inorganic contaminations present in the supply-water are
deposited on the surface of the membranes. The deposition of those contaminations
from the impure supply water on the membrane surface is generally referred to as
„fouling“.
If organic contaminations from the impure supply water are adsorbed, it is often
referred to as „organic fouling“. The adsorption of micro-organisms to the surface of
membranes is designated as „biofouling“. Embedded in a gel, the micro-organisms
deposit from extracellular polymers as biofilm on the surface of a membrane. Biofouling
is particularly problematic since micro-organisms can reproduce on the membrane
surface and therefore substantially affect the efficiency of the plant.
In order to prevent the process of biofouling effectively, the addition of biocides is
essential. For this, Kurita has developed special biocides which contribute to the
economical operation of your reverse osmosis plant. Our technology is characterized
by:
Low dosing rates
Dispersion of existing biofilms
Prevention of germ resistance
www.kurita.de Product Sheet Reverse Osmosis, page 2

water management
process management
Pretreatment
Cleaning of Membranes
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
To achieve a long run length of the RO membranes, it is beneficial to reduce the load
on the membranes as much as possible by using an effective pretreatment of the
feedwater. Depending on the raw-water quality, this pretreatment could consist of
coagulation, flocculation, sedimentation, filtration etc.
Kurita possesses expert-knowledge and has developed special and innovative products
for this application range. On the basis of diverse analytical test-observations
and calculations, such as Silt Density Index, a selection of the best performing
products could already be achieved in the laboratory testing stage.
An effective pre-treatment of water is the basis for a smooth operation of the reverse
osmosis plant. However, it cannot be prevented that fouling processes and scaling
processes on membranes result in a decrease of performance during the time of
operation. This increases the energy demand of the plant while the quality of the
produced water diminishes. The loss of performance results from colloidal and microbiological
depositions as well as from deposits of metal hydroxides. In addition,
deposits of CaCO 3, CaSO 4, SiO 2, BaSO 4, CaF 2 also reduce the yield of permeate.
For this reason, it is necessary to clean the membranes regularly. Specific demands
require individual solutions in the establishment of the proper cleaning procedure.
For this reason, we perform a range of preliminary investigations in order to develop
a suitable cleaning procedure. The following aspects are of importance:
Autopsy of membranes
Performance tests
Analysis of water
Purification test
Analysis of deposits
Energy Considerations Increasing energy costs directly influence the costs of the production of reverse
osmosis water. The energy consumption of the high-pressure pumps play a central
role.
Regular monitoring of the pressure losses across the membranes and the flow rates
are important control parameters that give valuable information on possible scaling
or fouling on the membranes.
A further important aspect in the examination of energy consumption and saving is
the preheating of the feed stream by means of waste heat from other processes as
water temperature has a dramatic influence on the production of permeate.
Best choice for you is Kurita as your partner. Kurita´s engineers look at your plant
as an entire unit in order to achieve the best cost performance in an efficient and
effective way.
www.kurita.de Product Sheet Reverse Osmosis, page 3

water management
process management
All in one Hand
Consultancy is our Force
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
Kurita supplies the correct membrane for each application at competitive prices.
From the selection of membranes and optimization of the treatment program up to
professional service, Kurita provides a complete package which is outstanding in the
market.
Kurita advises you with word and deed!
Optimization of the dosage selection of suitable antiscalants
Optimization of the treatment with efficient biocides
Exact coordination and proper preparation of membrane cleaning procedure
Optimization of the pretreatment
From this, you benefit from the following advantages:
Improved utilization and effectiveness of chemicals
Increase in the plant’s reliability
Extension of the life span and run length of the membranes
Reduction of operating costs and investment expenses
www.kurita.de Product Sheet Reverse Osmosis, page 4

water management
process management
Company
World-wide Expertise
Kurita Water Industries Ltd.,
Tokio/Japan
Kurita Europe GmbH
Product & Service Portfolio
Contact
Kurita Water Industries Ltd.,
Tokio/Japan
Kurita Europe GmbH
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
Water and process management optimises cooling, boiler and waste water systems
as well as plants in refineries and in the petrochemical industry, e.g. through higher
plant efficiency, concrete cost savings and avoidance of production bottlenecks.
The name Kurita stands for one of the leading companies worldwide operating in the
field of water and process treatment. Kurita services and products help our customers
to optimise the performance, the safety and the operating time of their plants.
The result of our work: safe and more efficient plants, and thus cost saving through
reduction of maintenance and energy. Our portfolio consists of research,developmen
t,manufacturing of chemicals, consultancy and services for implementation.
Have a look at our product range:
Cooling Water Boiler Water Reverse Osmosis
Waste Water Process Paintshop
Refinery
Petrochemical
Chemical
Steel Industry
Pharmacy
Automobile
Power Plant
Our customers benefit from the years of experience and know-how transfer within
our company network. Numerous international patents qualify us to find solutions to
water and processing problems all over the world. For all our activities, environmental
aspects are of the highest priority.
Our parent company Kurita Water Industries Ltd., located in Tokyo, Japan, was founded
in 1949. With over 4,000 employees in 28 locations, active on all continents, the
Group achieved in 2009 sales of around US$ 2.0 b.
Since 1989 Kurita Europe GmbH serves the European market. Based in Viersen
(lower Rhine), the company has its own production facilities and state-of-the-art
application technology with pilot plants, laboratories and equipment at its disposal.
Our field service representatives - highly educated and qualified engineers - advise
and support our sophisticated, satisfied customers. Since 1995 Kurita Europe has
been certified according to ISO 9001 and 14001.
www.kurita.de Product Sheet Reverse Osmosis, page 5
Food
Paper
Mining
Semiconductor Production

water management
process management
Product and Service-
Portfolio
Contact
© 2012 Kurita Europe GmbH
Kurita Europe GmbH
Research, Development, Manufacturing - … and Successful Implementation!
Corrosion, scaling and microbiological processes are the known risks for plant
operation. In the scope of water treatment and process management Kurita supplies
solutions which consequently optimise the plant safety and efficiency.
Together with its clients, Kurita is developing individual treatment programmes and
provides:
system analyses
research, development, adaption
treatment chemicals
required measurement and control technology
consultancy for implementation
Products and plant technology comply with Kurita solutions in order to achieve
optimal results in economical and ecological respects. Our portfolio reflects our
profound knowledge:
water and process management
competent support with full service
individual treatment programmes
specialised, patented products and product combinations
environmentally compatible solutions
dosing-, measurement and control technology
All developments and solutions are specifically tailored to the requirements of your
plant: economical, environmentally compatible, and a permanently safe application.
KURITA EUROPE GMBH
Industriering 43
41751 Viersen Deutschland
Phone +49 (0) 2162 - 95 800
Fax +49 (0) 2162 - 40 159
Email: info@kurita.de
www.kurita.de
www.kurita.de Product Sheet Reverse Osmosis, page 6