The cost of manual dosing is not only the chemical it wastes; it is the compliance it misses and the labour it ties up. Automatic dosing recovers all three on a single skid.
The Operating Reality
On a circulating cooling loop or a wastewater stream, dose has to follow a moving target – make-up, blowdown, load and influent all change through the day. Manual rounds cannot track that curve.
Why It Matters
Reported field results on large circulating loops show chemical cost savings above RMB 800,000 per year, with waste falling from a typical 15-25% to 2% or less and concentration compliance rising from 65-80% to 98% or better.
Key Selection Points
- Chemical waste drops from 15-25% (typical manual) to 2% or less because dose tracks the actual signal instead of a timer.
- Compliance lifts from 65-80% to 98%+ as concentration stays inside the protection band continuously.
- Labour: inspection rounds fall from about 4 per day to roughly 0.2 per day, and manual handling of concentrated chemical is largely removed.
- Safety: leak alarm within 2 seconds and dry-running protection suit rooms visited only weekly.
- Sludge in wastewater duty falls as over-feed is avoided, cutting both chemical and disposal volume.
Selection Checklist
- Quantify current chemical use and estimate the 15-25% manual waste being removed.
- Estimate compliance gap (65-80% manual vs 98%+ automatic) and its risk cost.
- Add the labour saving from 4/day to ~0.2/day inspection rounds.
- Include safety and sludge-disposal savings for wastewater duty.
- Build the payback from chemical + labour + risk reduction, not chemical alone.
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FAQ
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