As a progressive industrial activity, effective management of wastewater has become critically important. High levels of Chemical Oxygen Demand (COD) and Total Dissolved Solids (TDS) in effluent streams are among other impositions causing serious challenges to the industries-from regulatory t Sultanovgun to green process business purposes Enter the Nano-Filtration Membrane for COD-TDS Reduction, which is indeed a very viable and efficient solution to all those problems.
Nano-filtration membranes function selectively to remove organic compounds, salts, and other impurities while retaining the essential minerals. In most advances, this technology will provide sustainable and economical treatment of wastewater for cleaner discharges, with lesser impacts on the environment. It can save huge operational expenditure and make stringent compliance with environmental requirements much simpler.
At Jay Water, we are obsessed with developing the most advanced Nano-Filtration Membrane for COD-TDS Reduction to solve all wastewater treatment-related issues in industries. These membranes integrated into your system would help minimize the levels of effluent COD and TDS and ensure compliance with all regulations while endorsing the environment as well. Experience the right mixture of efficiency, sustainability, and affordability with the innovative water management solutions at Jay Water. Let’s make sustainable water practices a reality!
Old Effluent Treatment Plant & RO Plant
Generated effluent treated in conservative ETP of capacity pf 900 KLD. ETP treated water feeds in RO plant, where feed parameter is COD 300 ppm & TDS < 5000 ppm. (In general TDS value is low around 2000-2200 ppm, In worst case TDS may increase up to 5000 ppm TDS ) RO plant design on 65% recovery. So, final reject generated around 300-320 KLD.
Challenges
Factory discharge limit is 120 KLD to CETP and RO reject qty is 300-320 KLD. SO, RO reject water needs to reduce with further treatment. General parameter of RO reject is COD 800 ppm and TDS < 6000 ppm. Along with this, it was difficult to allocate more space to expand the existing ETP for further treatment.
Due to high COD value in RO reject water , second stage RO plant was not possible, So, We provided Nano-filtration membrane technology for further treatment.
Used Nano-Filtration Membrane for COD-TDS Reduction
With the help of Nano-Filtration membrane technology RO reject water can treat further to reduce final reject volume. So, total reject water reduce to 110 KLD from 320 KLD after NF plant. Parameters limit of discharge water is < 3000 ppm COD and flexible in terms of TDS. So, issue resolved with the help of NF plant as it is use limited space and match their discharge qty limit.
Water quality of Nano-Filtration membrane permeate as below:
| PARAMETER | NF FEED | NF PERMEATE |
|---|---|---|
| COD (ppm) | 800 | < 50 |
| TDS (ppm) | 4500 | < 500 |
| TSS (ppm) | 10 | – |
| NF Plant Capacity | 416 KLD | |
| System Recovery | 65% | |
| CIP Frequency | DAILY | |
| Membrane | TORAY make CSM NF | |
Summary & Benefit
- Purpose fulfilled with after adding just Nano-Filtration technology in existing ETP scheme.
- In case of high TDS like 16500 ppm, NF treated water needs feed in RO plant for further treatment, In general case where NF feed TDS is 6000-8000 ppm, client can use NF treated water directly for cleaning and washing.
- Lower osmotic pressure required compare to RO & achieve high recovery.
- Best technology to remove diverse MW organic mixtures which is cause the COD in effluent.
- Nano-Filtration membranes are having hydrophobic surface, which is antifouling in nature. That’s why it can easily remove surface chocking.
- Due to current scenario of water pollution issue, they are planning to upgrade ETP to ZLD(Zero Liquid Discharge), for that might ad one more NF system to further concentrate the effluent and feed in MEE.
Conclusion: Leveraging Nano-Filtration Membrane for COD-TDS Reduction
For existing effluent treatment plants, the integration of Nano-Filtration Membrane facilities for COD-TDS reduction has proved to be a game changer for critical waste water problems. Advanced NF membrane technology helped the factory get around space constraints, reduce high COD levels and efficiently meet strict discharge limits.
The total reject water volume was hence reduced by incorporation of NF membranes, from 320 KLD to 110 KLD, which meets the limit of 120 KLD discharge to CETP. The permeate water quality also improved phenomenally to <50 ppm COD, <500 ppm TDS. All these help to lower the ecological footprint and bring optimization in the water management processes. Moreover, the NF membranes possess hydrophobic surfaces, which resist the fouling, ensuring convenient operation at low maintenance costs.
The flexibility of Nano-Filtration technology is another great advantage. If TDS levels are too high (up to 16,500 ppm), then the water from the NF plant would be sent to the RO plant for final purification. Otherwise, with normal feed TDS levels of 6,000–8,000 ppm, this permeate is directly used for cleanliness and washing applications. That is what makes it a sustainable option in various aspects of industrial usage.
Now, the factory is going for another upgrade to zero-liquid discharge systems by adding another NF system to concentrate the effluent before it enters MEE. This is the trend in realizing the importance of Nano-Filtration Membranes with COD-TDS reduction for sustainable water practices.
