After two years of operation, many industrial water treatment systems encounter thorny problems such as slippery, sticky pipe walls, widespread algae growth, and pitting leaks in stainless steel pipes. Repeated manual scrubbing and high-flow-rate flushing only provide temporary relief for two to three months. Algae spores and deep biofilms, hidden in the pipe's dead corners, cannot be completely removed, not only doubling the rate of pipe corrosion but also continuously releasing impurities into the water, directly lowering the quality of the entire water treatment system's output. Frequent downtime for maintenance further disrupts production. DIEN Water Treatment, deeply rooted in the front lines of water treatment operations in Northwest China, has witnessed numerous similar failures. Superficial cleaning is insufficient; a comprehensive, closed-loop antibacterial and anti-corrosion system is necessary to completely eradicate the root causes of recurring algae growth and corrosion.
DIEN Source Water Treatment Equipment Manufacturer
Algae growth and microbial corrosion are always intertwined: Light leakage in translucent pipes provides conditions for algae photosynthesis; improper pipe layout creates stagnant water sections; trace organic matter in the water provides nutrients for microorganisms; and the biofilm formed after algae metabolism adheres firmly to the pipe wall, slowly creating an anaerobic corrosion environment beneath the film. Within just one or two years, this biofilm can corrode through the 304 stainless steel pipe wall, causing problems such as seepage and sudden drops in water pressure. Ordinary single-dose treatments and simple flushing can only remove the visible algae on the surface; the spores hidden beneath the biofilm remain undamaged, and will re-emerge on a large scale when the temperature is suitable.
DIEN Water Treatment, taking into account the local water quality characteristics of Northwest China—high hardness and high organic residue—has launched a four-step low-cost water treatment equipment retrofit solution: "Cleaning and Removal + Continuous Antibacterial Treatment + Pipeline Protection + Structural Optimization." This solution eliminates the need for complete pipeline replacement, minimizing retrofit costs:
Offline Sludge Removal and Cleaning: Food-grade special removal agents are used for full-pipeline circulation flushing, gradually breaking down stubborn algae and biofilm on the pipe walls. This prevents large pieces of algae from clogging the downstream filter cartridges. Finally, a high-flow-rate pure water flush thoroughly removes all algal residue from the system.
Addition of Long-Lasting Antibacterial Unit: Pipeline-type ultraviolet sterilization equipment is selected based on site conditions. For high-pollution scenarios, an automatic quantitative dosing device is provided to continuously inactivate algal spores in the water 24 hours a day, cutting off the path of algae regeneration at its source.
Pipeline Corrosion and Light-Shielding Treatment: Slightly corroded pipes undergo passivation pre-filming treatment, forming a dense protective layer on the pipe walls. Translucent PVC pipes are wrapped with light-shielding and heat-insulating cotton, completely blocking the necessary conditions for algal photosynthesis.
Water Treatment Equipment
Optimizing Pipeline Flow Structure: The pipeline layout was readjusted, eliminating all dead zones in the water flow. Automatic drain valves were installed at the lowest points to completely eliminate water stagnation sections, physically reducing the possibility of microbial adhesion.
A food processing plant in Xianyang, Shaanxi Province, had been operating its pure water system for five years. The pipes repeatedly developed algae blooms, some stainless steel pipe walls showed pitting corrosion, and green flocculent matter occasionally floated in the effluent. Monthly shutdowns for manual pipe cleaning were required, severely disrupting production. Previously, the client had repeatedly flushed the pipes themselves, but the algae would reappear within half a month. After a site survey by the DIEN team, 90% of the original pipeline was retained, and the above four-step solution was implemented for modification. Ten months after the water treatment equipment was put into operation, no more slime or algae has grown on the inner walls of the pipes, no new corrosion points have appeared, and the effluent is consistently clear and sterile. Monthly shutdowns for cleaning are no longer required, reducing the annual maintenance workload by 70%. The factory manager commented: "In the past, we had to deal with pipeline problems every year, which was always just a temporary fix. After DIEN's renovation plan was completed, the system runs very smoothly, and we no longer have to worry about the moss and corrosion on the pipelines."
