Convert Pounds per day to Short tons per minute
Convert Pounds per day (lb/d) to Short tons per minute (ton/min) instantly and accurately.
Conversion Formula
ton/min = lb/d × 3.472222222e-7
About Pounds per day
The pound per day (lb/d) equals 0.45359237/86400 ≈ 5.249×10⁻⁶ kg/s, used in wastewater engineering for reporting biochemical oxygen demand (BOD) loads, nutrient loadings, and sludge production. US NPDES permits set effluent mass-load limits in lb/d; a municipal WWTP serving 10 000 people generates roughly 1 500-3 000 lb/d of dry sludge solids. 1 lb/d ≈ 5.249×10⁻⁶ kg/s.
About Short tons per minute
The short ton per minute (ton/min, US) equals 907.18474/60 ≈ 15.120 kg/s, typical for high-capacity conveyor belts and bucket-wheel excavators in open-cast mining. A large surface coal mine loads unit trains with overland conveyors rated at 5 000-15 000 short ton/h = 83-250 ton/min. 1 short ton/min ≈ 15.120 kg/s = 2 000 lb/min.
Quick Reference Table
| Pounds per day (lb/d) | Short tons per minute (ton/min) |
|---|---|
| 1 lb/d | 3.472 × 10-7 ton/min |
| 2 lb/d | 6.944 × 10-7 ton/min |
| 5 lb/d | 1.736 × 10-6 ton/min |
| 10 lb/d | 3.472 × 10-6 ton/min |
| 25 lb/d | 8.681 × 10-6 ton/min |
| 50 lb/d | 1.736 × 10-5 ton/min |
| 100 lb/d | 3.472 × 10-5 ton/min |