HERO (High Efficiency Reverse Osmosis) is a reverse osmosis method developed specifically for high silica and difficult-to-treat wastewater. The high efficiency reverse osmosis method provides the end user with better recoveries as well as considerable operational benefits by efficiently preventing membrane fouling or scaling. Where traditional reverse osmosis (RO) is typically thought to be a less successful technology, the process has a great track record of treating cooling tower blowdown.
HERO can easily manage constituents that cause issues in traditional RO procedures. Biological matter, oil and grease, and silica are examples of these ingredients.
The HERO procedure gives the operator and endusers “HIGHER RECOVERIES AND OPERATIONAL BENEFITS” by efficiently preventing these elements from being a root cause of membrane scaling. Both result in COST SAVINGS by:
1- Consumption of water is reduced.
2- Anti-scalants are used less frequently.
3- Cleaning isn't as necessary.
HERO is perfect for:
1- High Silica Water
2- Cooling Tower Blowdown
3- Tertiary Treated E?uent (Sewage) High TOC / Biologically Active Water
In RO process, high-TDS feed water is pushed across a semi-permeable membrane. Because the membranes reject salts, a portion of the supply water passes through it and has a low TDS (total dissolves solids or salts). The remaining water is labelled as reject and has a high TDS level. As a result of the RO process, salts are concentrated in the reject stream.
Constraints of a traditional RO Process, the natural saturation limits of certain salts should not be exceeded when building a RO system, otherwise, these salts will precipitate and scale the RO membranes. The most common process limiting component is silica. The solubility of silica is 120 parts per million at 77 degrees Fahrenheit and a pH of 6.5 to 7.5. Scaling of membranes would occur if silica in reject water exceeded 120 ppm under the given conditions. Thus, if the feed water contains 50 ppm of Silica, the maximum concentration feasible under normal RO conditions would be attained in just two concentration cycles. This would imply a permeate recovery rate of around 50% from the feed water.
As a cost-effective means of achieving zero liquid discharge, HERO may be used to replace or enhance an evaporation process in some cases (ZLD). With over many installations around, NETSOL has unrivalled experience with HERO technology.
The basic procedure involves three steps: removing hardness and suspended particulates, removing carbon dioxide, and treating the water with reverse osmosis at a higher pH.
BENEFITS OF HERO:
1- High Recovery
2- High Salt Rejection
3- High Flux
4- Reduced Fouling
5- Lower Operational Costs
6- Reduced Maintenance
ECONOMIC BENEFITS OF HERO:
The HERO technique not only outperforms traditional reverse osmosis in terms of technology, but it also saves money.
HERO operates in a "continuous cleaning mode" due to its high pH working environment, which eliminates the need for capital equipment redundancy to compensate for cleaning downtime.
The cost per gallon for clean water production is reduced since the HERO system allows for more water recovery.
MINIMAL OFFLINE CLEANING:
According to operating data, HERO only needs to be serviced once a year, compared to twice to three times a year for conventional reverse osmosis. Reduce the amount of time your system is off-line for membrane cleaning by a significant amount.
NO PROPRIETY CHEMICALS:
The HERO technology uses standard chemical feed requirements, allowing you to save money on expensive cleaning chemicals.