Greendex provides the expertise for design and built of disinfection system from small to large scale installation. We have installation references ranging from municipal drinking water treatment plants to sewerage treatment plants, rubber glove industries, petrochemical, aquaculture, swimming pools and etc.
Chlorination is one of the most prevalent methods of water disinfection. Chlorine can be applied in different processes to destroy target organisms and prevent the spread of diseases to make the drinking water fit for human consumption.
The complete line of De Nora gas feed disinfection technologies include Chlorination, De-Chlorination / Sulfonation, Ammoniation and Recarbonation equipment. With more than 50 years’ experience and many thousands of installations globally, our De Nora Capital Controls chlorination system sets the benchmark for the best quality chlorinators in the market. All the equipment manufactured are ISO 9001: 2000 certified. We have the highest presence in all municipal water treatment plants.
Electro-chlorination or also termed On-site hypochlorite generation system is the production of a dilute form of disinfectant compared to chlorine gas or concentrated commercial hypochlorite. As a result, handling, transportation and containment are easier and safer.
De Nora ClorTec® have a strong reputation as the leading global technology provider with a proven track record of more than 3000 global installations. The ClorTec® systems generate a 0.8% sodium hypochlorite disinfection solution, a chlorine equivalent, using three common consumables: salt, water and electricity. The patented split flow design allows for the lowest operating cost in the industry.
The benefits of the on-site sodium hypochlorite generation systems include:
- A proven, cost-effective, reliable and safe alternative disinfection treatment method
- Eliminating the bulk storage of chemicals
- Reducing risk to plant personnel because of drastically reduced hazardous material storage and handling requirements
- Eliminating transportation liabilities
- Reducing the threat to public safety
- Reducing the production of disinfection byproducts
- Creating a consistent solution concentration and increasing water quality
- Reducing overall disinfection costs
- Reducing the cost of pH adjustment
Greendex is the market leader and pioneer of Electro-chlorination system in S.E.A
Ultraviolet (UV) is chosen as the advance non-chemical disinfectant option for municipal water and wastewater treatment because it is a highly effective method of destroying microorganisms.
The effectiveness of germicidal UV in such an environment depends on a number of factors: the length of time a micro-organism is exposed to UV, power fluctuations of the UV source that impact the EM wavelength, the presence of particles that can protect the micro-organisms from UV, and a microorganism’s ability to withstand UV during its exposure.
Theory of UV Disinfection:
DNA adsorbs UV energy between 250 and 265 nm
- UV energy alters genetic structure of microorganism
- UV energy stops the reproductive process
- Microorganism is considered inactivated, non-infective or microbiologically dead
Greendex has the experience of supplying small UV installation for irrigation applications to large UV installation in sewerage treatment plants. Closed vessel and open channel types are both available.
Chlorine Dioxide is a very effective disinfectant against cryptosporidium and has no reaction with ammonia.
Our system produce chlorine dioxide and consistently maintain a product yield greater than 95%, making it ideal for drinking water treatment.
- ClO2 is 2.5 times more effective than CL2. A CT of 0.25 ppm @ 20 secs = 99.99% kill of all pathogens
- Dissolves easily in water
- ClO2 gas remains dissolved in water
- Generated on-site
- No transportation of Chlorine gas
- ClO2 is a good oxidant for iron and manganese removal. It also improves sedimentation and lowers turbidity.
Because of its excellent disinfection and oxidation qualities, ozone is widely used for drinking water treatment. At municipal plants ozone can be added at several points throughout the treatment system, such as during pre-oxidation, intermediate oxidation or final disinfection. Usually, it is recommended to use ozone for pre-oxidation, before sand filters or with active carbon filters (GAC).
Ozone is a very active form of oxygen. It is formed when oxygen is exposed to a high-energy field causing some oxygen molecules(O2) to break down to oxygen atoms(O). The oxygen atoms (O) then react with the oxygen molecules (O2) to form ozone (O3). Notice that this is a reversible reaction meaning that ozone can decompose back to oxygen.
- Plant capacity: 500,000 m3/day
- Ozone production: 4 generators with a capacity of 12 kg/h @ 10% each (total 48 kg/h)
- Application: Municipal drinking water treatment
Plant capacity: 2,000,000 m3/day
Ozone production: 6 generators with a capacity of 26 kg/h @ 10% each (total 156 kg/h)
Application: Municipal drinking water treatment