Chlorine Gas

Nanotech developed On Site manufacturing of chlorine gas with liquid pre-cursors as input chemicals, efficient, reliable and SAFE.

Chlorine gas is mass produced from established industrial processes. It’s stored in high pressure vessels ranging from typically 70 kg to 990 kg of chlorine in containers. The chlorine gas is in a liquid form inside these pressure vessels and are transported all over the continent on Hazchem delivery vehicles.


The transporting and handling of chlorine gas cylinders is inherently dangerous as these are manhandled. Therefore, Incidents are recorded continuously. Leakages of these pressure vessels can cause a significant number of deaths, and subsequently extensive and permanent harm to mankind.

Therefore, The equipment designed and used to convert the chlorine liquid to a gas phase needs to be inspected regularly and should be well maintained to prevent any spillages and leakages.

The capital costs for any chlorine gas installation are significant if all safety regulations are adhered to. For example, well-ventilated buildings, extraction fans, gas scrubber systems and good quality warning devices that shut off supply of the liquid or gas chlorine to the environment or process.

As a result, In most cases, the condition, quality and safety issues are not up to minimum safety standards due to lack of regular maintenance and lack of experienced personnel to manage these installations.

The most significant safety factor in these installations are the inventory of chlorine gas, liquid or gas on site. When something goes wrong, this inventory will escape to the environment. consequently, cause huge harm to everyone and everything in its way. subsequently,  KILLING all living species.

Read More about the Challenges associated with Chlorine Gas and Nanotechs approach.

The “On Site” chlorine manufacturing idea was born to address significant risks associated with chlorine gas and the stringent legislation of SANS 10298:2009

About On Site Chlorine Gas Manufacturing

On Site manufacturing of chlorine gas with liquid pre-cursors as input chemicals, efficient, reliable and SAFE.

Therefore, The “On Site” chlorine manufacturing idea was born to address significant risks associated with chlorine gas and the stringent legislation of SANS 10298:2009

Unique benefits of the technology:

  • Compact design
  • Modular systems
  • Two Chemical System
  • Auto Control System
  • Ph Control
  • Flow Control
  • Free chlorine measurement and control
  • Remote Login Facility
  • Gas Leaking device optional
  • Technology Support
  • SLA Agreement

Process description of Technology

The technology is a chemical process. Two pre-cursors are mixed in a predefined ratio and fed into a chemical reactor chamber for the reactions to take place. These two pre-cursors are Hydrochloric Acid (HCl) and Sodium Chlorate (NaClO3).

The chemical reactions are that of the oxidation and reduction of the pre-cursors. Therefore, The sodium chlorate is reduced to chlorine and the hydrochloric acid is oxidised to chlorine.

When chlorine output is required, the basic chemical formula is the following:

NaCLO3 + 6HCL = 3CL2 + NaCL + 3H20

This concentration is diluted with water to a safe level of chlorine gas dissolved in water.

When chlorine and chlorine dioxide output is required the basic chemical formula is the following: 

2NaClO3 + 4HCl = 2ClO2 + Cl2 + 2NaCl +2H20


Firstly, The main advantage of this technology is the on-site manufacturing of chlorine gas dissolved in water and then used in the process for disinfection. In addition, The pre-cursors are hydrochloric acid and sodium chlorate which are injected into a chemical reactor chamber. This produces a final concentration of chlorine of 2000 to 3000 ppm in water.

Secondly, Added to this technology package, the process water pH will be controlled within a pre-determined range of typically 6.0 -7.5, to maximise the full disinfection potential of disinfectant, on-site chlorine generation.

Finally, the SLA agreement will take care of the maintenance of the system and components, delivery and stock management of pre-cursor chemicals and consistent final product delivery (chlorine) with minimum process availability of 98%.

Chlorine Dioxide

What is Chlorine Dioxide?

Chlorine Dioxide (ClO2) also known as Clear, is a chemical compound with the formula ClO2. This yellowish-green gas crystallizes as bright orange crystals at 59 °C. As one of several oxides of chlorine. Therefore, it is a potent and useful oxidizing agent used in water treatment.

Chlorine Dioxide Proven Uses

Chlorine Dioxide (ClO2), branded as Clear has been successfully proven in:

  • Increase in Waste & Potable water Micro Compliance
  • Disinfection at municipalities and boreholes for drinking water
  • Colour, odour and taste removal
  • UF and RO feed, iron and manganese oxidation
  • Improved clarification to reduce turbidity
  • Up to 60% reduction of TOC in clarification process

Download the Clear Brochure

The Benefits  Chlorine Dioxide?

Firstly, Chlorine Dioxide (ClO2), known as Clear acts by first destroying the cell membrane, then the nucleus of the bacteria by chemical oxidation; not chlorination. Because the organism is totally destroyed no resistant strains can develop which enables chlorine dioxide to be used on a continuous basis without the need for alternating biocides.

Secondly, It is a fast acting and extremely effective biocide, functioning as a highly selective oxidizer with less environmental impact.

In addition, Chlorine Dioxide (ClO2) minimizes wasteful reactions, which means a more proficient disinfection / oxidizing agent for your treatment regime.

Why Use Chlorine Dioxide

Numerous projects later, we have found the perfect balance between reliable components, cost-effective precursor chemicals, performance-based methodologies and good maintenance practices, to create generators that lead to 100% compliance to local authoritarian regulations for consumption of potable water.

Our Approach to Chlorine Dioxide (Clear)

Nanotech has been involved in Chlorine Dioxide (ClO2) generation for years, building systems locally, and testing all the chemical reaction technologies. Each one of these technologies has its own unique advantages and disadvantages. So, Nanotech re-engineered Chlorine Dioxide generation methods to adapt to changing customer requirements and sensitivity to dangerous byproducts and contaminants added to their processes. Thus, we rebranded our Chlorine Dioxide (ClO2) solution and renamed it Clear.

So it only made sense to learn from all the good systems and develop a superior system, fit for the African market!

Our Technologies

As the market leader, Nanotech sets the trends when locally manufacturing Chlorine Dioxide for the local and international markets. The technologies within our product portfolio are:

  • Ion Exchange & Catalyst Technology
  • 3 Precursor Technology
  • 2 Precursor Technology
  • Dilute / Concentrate
  • Chlorine Gas & Sodium Chlorite

Some of the Nanotech Chlorine Dioxide Generator Advantages:

The aim in installing a Clear Generator Is to maximise the Chlorine Dioxide production, whilst cutting down on chemical transport cost. Allowing for the most cost effective solutions, with the greatest efficiencies.

We have found the perfect balance between reliable components, cost-effective precursor chemicals, performance-based methodologies and good maintenance practices, to create generators that lead to 100% compliance to local authoritarian regulations for consumption of potable water. Our Advantages are as follows:

  • Chemical Conversion efficiency of 98.5%
  • Less components which can fail
  • Zero sodium ion in product
  • Dangerous byproducts eliminated, below detection level
  • Only one precursor and one regeneration chemical
  • Corrosiveness significantly reduced
  • Clear gas dissolved in water to safe levels
  • Transportation of chemicals significantly reduced (huge hidden cost if not made aware and using dilute concentrations)
  • Very safe process and very low inventory of ClO2 solution in reactor
  • No free Chlorine in product – HUGE ADVANTAGE for membranes and resin applications
  • Increase in safety
  • Ease of use
  • Remote monitoring
  • Data logging and reference
  • SMS notifications
  • Chlorate levels minimized, almost eliminated due to pH during the manufacturing process


In summary, Chlorine Dioxide (ClO2) has CLEAR advantages over Chlorine. For instance, Chlorine Dioxide is more effective, less cost and kind to the environment. In addition, Chlorine Dioxide helps with disinfection at municipalities and boreholes for drinking water and assist

Enquire Now or Contact Gideon Reyneke at +27 76 892 9146



Reservoir & Tank Cleaning

Reservoir or Tank cleaning is a common practice applied in various industries as part of preventative maintenance. The service offered by Nanotech Water Solutions has incorporated the following three steps into the Standard Operating Procedure (SOP);

  • Tank or Reservoir Inspection;
  • Reservoir Interior Wall Cleaning through high pressure washing; and
  • Tank Interior wall disinfection with Clear.

Through the application of the reservoir cleaning and disinfection program, the potential for microbiological, chemical or physical problems are controlled and eliminated. This maintenance of water storage facilities, namely: Plastic Tanks, Galvanized Tanks, Hotwells, Concrete Reservoirs, Fibreglass Tanks etc, through periodic cleaning is an important component of providing clean and safe drinking water to consumers.

What could be in your tank/reservoir?

  • Contamination by pathogens like Cryptosporidium and E.coli, introduced into the tank by birds and vermin;
  • Sediment accumulation which microbial growth and increased turbidity in water;
  • Formation of disinfection byproducts like trihalomethanes; as well as,
  • Increased disinfection chemical demands resulting in unnecessary use of excessive amounts of disinfectants.

When should you clean your tank?

  • Every 2 years (depending on the water quality and system);
  • When sediment and/or biological growth is observed inside the tank;
  • If any repairs or modifications are done to the water system;
  • If coliform bacteria is detected in the water system; and finally
  • if there are any noticeable changes in water quality (taste, odour, colour issues)
Below Video: Sludge Build up in 30 mega liter drinking water reservoir, over a 1.5 year period.


Contact us now for Reservoir Cleaning Inquiries.

Sewage Treatment

Why do we treat Sewage/Wastewater?

Firstly, we treat sewage for hygienic reasons and to protect the population against diseases and illness. Secondly, to protect the environment such as raw water sources (rivers, boreholes, streams, and dams) against contamination.

Thirdly, to recycle wastewater for re-use as it is a scarce commodity and for aesthetic reasons which eliminates bad smells. Furthermore, Companies are legally required to treat wastewater and must comply with discharge standards and above all else, it’s the right thing to do!

How do we treat Sewage or Wastewater?

 Our packaged sewage treatment systems are based on a preferred technology known as Submerged Aerated Fixed Film (SAFF) technology. The typical process consists of the following steps:

  1. Screening -> Primary treatment (septic tanks)
  2. Carbon removal and nitrification (recycle tank and SAFF) 
  3. Solids removal (secondary settler) 
  4. Chlorine contact tank for disinfection (chlorination). 

The outlet water quality expected from the SAFF process is in compliance with the RSA General Specification “Revision of general authorisation in terms of section 39 of the National Water Act 1998 (Act no 36 of 1998)” or if required, the South African Special standard.

Biological oxygen demand (BOD) and chemical oxygen demand (COD) are organic contaminant parameters used to measure water quality. As a result, BOD is used to determine how fast biological organisms consume oxygen in a body of water, while, on the other hand COD measures the amount of organic compounds in water.

SAFF is an extremely efficient and well-proven sewage treatment process which enables the reduction of the main contaminants which are:  BOD, COD, Ammonia, Nitrogen, Suspended Solids and Ortho-Phosphates.

For Instance, A typical operational cycle would commence with wastewater being collected in the septic tank, which also acts as the balance tank at the front end of the plant. This balance tank offers flow buffering during peak inflow periods. The collected sewage is pumped to the SAFF unit where aeration takes place. The final treatment includes settling and chlorination, with internal recycle streams for de-nitrification.

Therefore, Nanotech designed the SAFF wastewater treatment plant with superior compliance to required legislation, consistently and reliably,  when compared to other technologies.

In conclusion, The Nanotech-branded technology, known as “Compliance”, has been designed to maximize technology efficiency and low operating costs.  The sewage systems are manufactured in-house and pre-tested, before being shipped to site ready for rapid installation.


Advantages of the Nanotech Sewage Treatment Technology:

  • Simple, reliable biological process.
  • It Leaves a smaller carbon footprint than the traditional systems.
  • Effective in treating high concentrations of organics.
  • The final water quality conforms to The South African General Limit.
  • The final outlet water can be treated to achieve The South African Special Limit.

Other benefits of the Nanotech Water Solutions SAFF systems:

  • Less time spent on site.
  • Fewer civil structures and less inter-connecting pipework and process equipment, with the resultant savings in capital and operating costs.


Chlorinator Offering

Chlorinators are typically used as the final stage of water treatment, referred to as the disinfection stage. The Lutz-Jesco gas-conveying technology is specially designed for chlorination.

However divergent the requirements may be, the comprehensive range of well-proven units can deliver doses of chlorine gas or liquid. These chlorination systems meet all the requirements of modern applications and they are distinguished by their reliability and unwavering dosing accuracy.

Small Chlorination Plants

It is possible to achieve extremely precise water disinfection dosing with this DIN-standard chlorination plants. The chlorine gas metering devices ensure maximum safety according to DIN 19606 by operating under full vacuum, starting at the chlorine cylinder, and simultaneous chlorine gas delivery is possible with the C 2211 chlorinators.

A wide range of pumps, complete with mixing and storage tanks, is available to meter liquid products at public baths and swimming pools. Our amperometric, potentiostatic and diaphragm-covered sensors easily measure the concentration of free chlorine, thereby determining the resistance of the water to bacteria.

Besides accurately measuring free chlorine in water, we offer equipment that can measure, record, and control chlorine dioxide, pH value, redox potential and conductivity. Gas warning devices monitor chlorine concentrations in the air of spaces where chlorinators are installed and every sensor has two alarm levels.

Our small chlorination plant equipment includes:

  • Full-vacuum chlorinators with a capacity of up to 10 kg of chlorine per hour
  • Chlorine gas changeover equipment
  • Chlorine control valves
  • Chlorine evaporators
  • Gas detectors
  • Several optional fittings and accessories

Download Small Chlorination Brochure More About Lutz-Jesco

Large Chlorination Plants

Lutz-Jesco’s systemised chlorine applications have been designed to be safe and reliable, while being user-friendly and easy to handle.

Dosing accuracy is extremely well controlled and modular disinfection is possible with the C 2525 and C 2700 chlorinators; these are rated at up to 200 kg of chlorine per hour and they feature separate vacuum regulators.

For fully automatic operation, the C 7520 and C 7522 chlorinators feature automatic changeover valves and uninterruptible chlorine gas supply. Our vacuum chlorinators have been designed according to DIN 19606 and both wall-mounted and freestanding cabinet-type models are available.

The large chlorinator plant equipment includes:

  • Vacuum chlorinators
  • Chlorine control valves
  • Changeover valves
  • Ejectors
  • Chlorine evaporators
  • Accessories, like valves, manifolds, expansion cylinders and filters

Download Large Chlorination Brochure More About Lutz-Jesco

Dosing Pumps

Lutz-Jesco has developed special solutions for each area of application

The extensive range of products start at cost-effective, magnetically operated diaphragm dosing pumps, to powerful, motor-driven diaphragm dosing pumps and piston dosing pumps for high-pressure requirements. These are used for dosing fluids with highly fluctuating viscosities, most of which are chemically aggressive and toxic, and some of which are abrasive or give off gases.

It’s time for change, and this new era dosing pumps offer all the features to help you drive that change. With the visual user interface, operating and programming your dosing pumps are easier than ever. With Lutz-Jesco’s online tools, like the MAGDOS LD and MEMDOS SMART LD calculation wizards, you get results faster than ever. Make suction line, pressure peak, and pressure loss calculations on the fly.

MODBUS is the future of industrial communication and with industrial Ethernet via MODBUS-TCP, you no longer need expensive equipment. You can easily identify devices through adjustable IP addresses and you can remotely control and diagnose dosage pumps via the controller, ensuring optimal system automation.

These dosing pumps are intelligent, flexible, economical, and expandable.

Here is a short overview:

The Smart Series:

Stepper motor-driven diaphragm dosing pumps, available in outputs ranging from 2 to 19,2 litres per hour.

The All-rounder series:

Solenoid-driven diaphragm dosing pumps, available in outputs ranging from 0,5 to 115 litres per hour.

The Revolutionary series:

Motor-driven diaphragm dosing pumps, available in outputs ranging from 4 to 1020 litres per hour.

The Robust series:

Motor-driven diaphragm dosing pumps, available in outputs ranging from 3 to 8000 litres per hour.

The Strong series:

Piston dosing pumps, available in outputs ranging from 0,1 to 24 600 litres per hour.

The Flexible series:

Peristaltic pumps, available in outputs ranging from 7 to 9000 litres per hour.

The Optional series:

You have several options for extending your dosing pumps, like specifying a double-diaphragm system, electrical stroke adjustment ATE, or a piston diaphragm system. ATEX versions, frequency converters and separate fans are also offered.

Download Brochure More About Lutz-Jesco

Measuring & Control

Measuring & Control Equipment Range

In many applications, dosing control measurements are required, like water values, uninterrupted transmission of the measurement values, regulator functions, and controls for the dosing units. Lutz-Jesco has a wide range of equipment to meet these requirements, like fittings, sensors, measuring cells, signal amplifiers, signal generators, measuring devices, and regulators.


The TOPAX DX Multi-channel Controller monitors water value data recorded during water processing, providing real-time control of the metering system. One of its principal applications is in the preservation of water quality of outdoor swimming pools where it can analyse free chlorine, pH, ORP, total chlorine, and conductivity.

Every water parameter that is measured can be controlled and these control processes happen very quickly, thanks to the microprocessor-controlled metering amplifier.

Lutz-Jesco controllers are multi-purpose and 15 of the TOPAX-family controllers can be connected to a PC-supported TopView process control system. With the TopView computer software, everything is under control, providing for the control and display of networked TOPAX systems via a PC, and enabling remote setting of the controller. Even bonded chlorine data can be logged, measured, calculated, controlled and adjusted online.


Several water sampling stations are on offer from the EASYPOOL, DCM and PM ranges. EASYPOOL is ideal for private pools, featuring easy operation via a colour graphic display.

All the devices required for measuring and control are built into the station. Depending on the model, a myriad of parameters, including free chlorine, pH, temperatures, and conductivity can be measured.

The measuring and control product line includes:

  • TOPAX one-, two-, and multi-channel controllers
  • Water sampling stations (EASYPOOL, DCM, and PM)
  • Sensor technology, including sensors for free chlorine, total chlorine, and temperature, as well as pH and ORP electrodes, conductivity measuring probes, and flow rate and level sensors
  • Fittings, like flow rate and immersion fittings, and fitting blocks
  • Accessories, like photometers, TopView, and products like fans, digital frequency inverters, digital teleindication, and transformers

Download Brochure More About Lutz-Jesco