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October 18, 2023
Denor GRP Integrated Pump Stations Eliminate Blockages and Cut Energy Use by 35% at Thai Wastewater Plant
Bangkok’s wastewater infrastructure faces a daily battle. The city’s aging pump stations, many built decades ago from concrete and steel, were never designed for the high-solid, high-grease wastewater generated by Thailand’s sprawling capital.
Rags, plastics, cooking oils would accumulate inside the rough concrete wet well, fouling pump intakes and blocking suction inlets. The concrete wet well had spalled and corroded over years of exposure to septic sewage. Its rough internal surface provided the perfect anchor for rags and solids. Pumps struggled. Runtimes extended. Municipal engineers knew that replacing pumps alone would not solve the problem.
The Solution: Denor GRP Integrated Pump Station
Denor proposed a complete retrofit: a factory-built, hydraulically optimized GRP integrated pump station designed specifically for high-clog-risk wastewater.
1. Smooth, Corrosion-Proof GRP Construction
Unlike concrete, Denor’s glass-reinforced plastic is inherently smooth and non-stick. It does not corrode, spall, or provide footholds for debris. In Bangkok’s aggressive sewage environment, this single material change eliminated the primary cause of biofilm buildup and rag snagging.
2. Hydraulically Optimized Wet Well Design
Denor replaced the flat floors and dead zones with a sump-optimized floor profile that promotes continuous scouring. Sediment no longer settles. Solids stay suspended until pumped. The flow path is clean, continuous, and vortex-free.
3. Intelligent Control with VFDs
Variable frequency drives match pump speed to actual inflow, reducing turbulence and energy waste. The system runs only as hard as it needs to—no harder.
4. Factory-Built Precision
The entire station was prefabricated in Denor’s controlled facility and delivered ready to install. No on-site concrete pouring. No quality variability. Just precision-engineered reliability.
Since commissioning, the Denor station has operated without a single blockage. Crew safety has improved dramatically.
Energy consumption has fallen by 35%. Smooth GRP hydraulics, reduced pump head, and VFD optimization delivered savings that directly benefit the municipal budget.
Pump service life is expected to double. No more dry-running, cavitation, or overheating. The pumps now operate in the conditions they were designed for.
Municipal Response: Confidence Restored
“We spent every Monday morning clearing blockages,” said a senior municipal drainage engineer. “It was exhausting and dangerous. Now, the station just works.”
Municipal officials now point to the Denor retrofit as a model for future upgrades. The project proved that targeted, high-quality interventions can transform failing infrastructure without wholesale network replacement.
Bangkok’s Denor GRP pump station delivered exactly what it promised: zero blockages, 35% energy savings, and uninterrupted operation.
