Oklahoma Administrative Code
Title 252 - Department of Environmental Quality
Chapter 656 - Water Pollution Control Facility Construction Standards
Appendix A - Design Tables
Universal Citation: OK Admin Code A
Current through Vol. 41, No. 13, March 15, 2024
OAC 252:656-13-2(c) Aerated Grit Chambers:
| Grit Chamber Measurement Unitsa | ||
| Item | Unit | Range |
| Detention time at peak flowrate | Minutes | 2-5 |
| Dimension - Depth | Feet | 7-16 |
| Dimension - Length | Feet | 25-65 |
| Dimension - Width | Feet | 8-23 |
| Width to Depth Ratio | Ratio | From 1:1 to 5:1 |
| Length to Width Ratio | Ratio | From 3:1 to 5:1 |
| Air Supply per unit of Length | Feet3 per minute per foot | 3-8 |
aChart from 1 Wastewater Engineering: Treatment, Disposal & Reuse, Metcalf & Eddy, Inc., 4th Edition, (2003)
OAC 252:656-16-1(d)(1), Activated Sludge Aeration Basins:
| AERATION TANK CAPACITIES & PERMISSIBLE LOADINGS FOR ACTIVATED SLUDGE PROCESSES | |||
| Type of Process | Aeration Retention timeb | Aeration Basin Loadingc | F/M Ratio |
| (Hours) | (lb BOD5 per 1,000 ft3/d) | (lb BOD5/lb MLSS) | |
| Conventional | 6-8 | 30-40 | 0.25 - 0.50 |
| Step Aeration | 6-8 | 30-50 | 0.17-0.50 |
| Extended Aeration/Oxidation Ditch | 24 | 12-15 | 0.05-0.10 |
bLarger values for smaller plants, up to 5,000 "PE" design capacity
cLarger values for larger plants, over 5,000 "PE" design capacity
OAC 252:656-16-2(b), Trickling Filter Design:
| DESIGN PARAMETERS FOR TRICKLING FILTERS | ||||
| Hydraulic Loading | Organic Loading | |||
| gal/ft2/day | Million gallons/acre/day | Ibs BOD5/1000 ft3 of media/day | lbs BOD5/acre-ft of media/day | |
| Standard Rate | 45-90 | 2-4 | 5-12 | 218-523 |
| High Rate | 230-690 | 10-30 | 30-100 | 1300-4300 |
Added at 17 Ok Reg 1140, eff 6-1-00; Revoked and reenacted at 23 Ok Reg 937, eff 6-15-06; Revoked and reenacted at 28 Ok Reg 1282, eff 7-1-11
Disclaimer: These regulations may not be the most recent version. Oklahoma may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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