Liquid Filtration Bags in Municipal Water Treatment
Municipal water treatment plants face constant challenges related to suspended solids, rust particles, sand, and organic contaminants entering raw water streams. These impurities must be removed efficiently before further purification steps such as membrane filtration or chemical dosing. Liquid filtration bags play a critical role in protecting downstream equipment and improving overall system reliability.
In this case, a city water treatment facility processed surface water from a nearby river. Seasonal variations caused fluctuating turbidity levels, especially during heavy rainfall. Cartridge filters clogged frequently, resulting in high replacement costs and frequent downtime. The plant required a robust, cost-effective pre-filtration solution.
INDRO recommended polypropylene (PP) liquid filtration bags with a 25-micron rating, installed in a standard size #2 filter bag housing. PP bags were selected for their excellent chemical compatibility, low extractables, and resistance to microbial growth. The depth filtration structure effectively captured sand, silt, and organic debris while maintaining stable flow rates.
After installation, the facility achieved longer filtration cycles, reduced maintenance frequency, and improved protection for downstream membrane systems. Compared with cartridge filters, filter bag replacement costs were reduced by over 40%. Operators also appreciated the ease of handling and disposal.
This application demonstrates how INDRO liquid filtration bags provide a reliable and economical solution for municipal water treatment, especially where fluctuating solids loads are common.