Disinfection Design: ct value
ct uv radiation bacteria 1log to ct uv radiation giardia lamblia 3log
Wastewater disinfection design data from Metcalf & Eddy 5th Ed. Covers CT values (concentration × time) for log inactivation of bacteria, viruses, Cryptosporidium, and Giardia lamblia by chlorine, chloramine, chlorine dioxide, ozone, and UV radiation; specific lethality coefficients; physical/chemical properties of Cl2, ClO2, SO2, and O3; ozone Henry's law constants; HOCl ionization constants vs. temperature; chloramine activation energy; TDS contributions from breakpoint chlorination; dechlorination agent stoichiometry; chlorine dosage ranges for process applications; total coliform removal by treatment process; disinfection byproduct (DBP) compounds; ozone system energy consumption; and peracetic acid (PAA) commercial formulation specifications.
| parameter type | parameter id | ct unit | ct value max (mg·min/L or mJ/cm2) | ct value min (mg·min/L or mJ/cm2) | description | disinfectant | log inactivation (log10) | organism |
|---|---|---|---|---|---|---|---|---|
| ct value | ct uv radiation bacteria 1log | mJ/cm2 | 15 | 10 | UV dose for 1-log inactivation of Bacteria with UV radiation | UV radiation | 1 | Bacteria |
| ct value | ct uv radiation bacteria 2log | mJ/cm2 | 30 | 20 | UV dose for 2-log inactivation of Bacteria with UV radiation | UV radiation | 2 | Bacteria |
| ct value | ct uv radiation bacteria 3log | mJ/cm2 | 45 | 30 | UV dose for 3-log inactivation of Bacteria with UV radiation | UV radiation | 3 | Bacteria |
| ct value | ct uv radiation bacteria 4log | mJ/cm2 | 60 | 40 | UV dose for 4-log inactivation of Bacteria with UV radiation | UV radiation | 4 | Bacteria |
| ct value | ct uv radiation cryptosporidium 1log | mJ/cm2 | 3 | 2.5 | UV dose for 1-log inactivation of Cryptosporidium with UV radiation | UV radiation | 1 | Cryptosporidium |
| ct value | ct uv radiation cryptosporidium 2log | mJ/cm2 | 7 | 6 | UV dose for 2-log inactivation of Cryptosporidium with UV radiation | UV radiation | 2 | Cryptosporidium |
| ct value | ct uv radiation cryptosporidium 3log | mJ/cm2 | 13 | 12 | UV dose for 3-log inactivation of Cryptosporidium with UV radiation | UV radiation | 3 | Cryptosporidium |
| ct value | ct uv radiation giardia lamblia 1log | mJ/cm2 | 2.5 | 2 | UV dose for 1-log inactivation of Giardia lamblia with UV radiation | UV radiation | 1 | Giardia lamblia |
| ct value | ct uv radiation giardia lamblia 2log | mJ/cm2 | 6.6 | 5.5 | UV dose for 2-log inactivation of Giardia lamblia with UV radiation | UV radiation | 2 | Giardia lamblia |
| ct value | ct uv radiation giardia lamblia 3log | mJ/cm2 | 13 | 11 | UV dose for 3-log inactivation of Giardia lamblia with UV radiation | UV radiation | 3 | Giardia lamblia |
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators