Having worked in the industry for 10 years and over 300 water treatment equipment maintenance projects, I've found that the vast majority of users believe that adding more chemicals improves the effect. Last year, at a machine processing plant in Huyi District, Xi'an, maintenance personnel, fearing scale buildup on the RO membrane, privately increased the scale inhibitor dosage from 4 mg/L to 15 mg/L. After three months of operation, the membrane surface was covered with large amounts of residual scale, the conductivity skyrocketed from 12 μS/cm to 68 μS/cm, and the permeate flow dropped by 35%. Replacing the membrane alone cost 22.000 yuan. When I disassembled the membrane, I found that the surface was covered with viscous organophosphonate precipitates, not calcium and magnesium scale—overdosing didn't prevent scale; it essentially "coated" the membrane with scale.
Many people also believe that higher concentrations of bactericides result in faster algae removal. I witnessed this in a circulating water project in Xianyang, where maintenance personnel adjusted the concentration of an oxidizing bactericide to 600 ppm. Within three days, the inner wall of the carbon steel pipes developed pitting corrosion, and the system's makeup water volume doubled. In fact, excessive application of bactericides can rapidly damage the polyamide surface layer of the reverse osmosis membrane, causing an irreversible decrease in desalination rate, making it completely counterproductive.
I believe that 70% of water treatment equipment system failures are not due to water quality issues, but rather to insufficient precision in the dosing equipment and improper operation and maintenance. Many small plants use cheap metering pumps with flow errors exceeding 20%, constantly dosing too much or too little, which cannot withstand even the best water quality. Our DIEN's fully automatic dosing equipment, with metering pump accuracy controlled within ±1%, can consistently control the reagent concentration. Combined with online hardness and residual chlorine monitoring modules, it automatically adjusts the dosage, requiring no frequent manual intervention and adaptable to various industrial scenarios.
For water treatment equipment and related solutions, it's more worry-free to contact the original manufacturer directly. DIEN Water Treatment eliminates middlemen, ensuring reasonable and transparent pricing. Our full range of products includes fully automatic dosing devices, scale inhibitors, bactericides, reverse osmosis equipment, water softening equipment, well water purification equipment, and wastewater treatment equipment. All chemicals undergo compatibility testing, and the equipment undergoes a 72-hour pressure test before leaving the factory. We offer a one-year warranty, and for local projects in Xi'an, we provide on-site commissioning within two hours and free calibration of dosing parameters to prevent equipment malfunctions caused by improper chemical dosing.
