Okla. Admin. Code § tit. 252, ch. 656, app A
Current through Vol. 42, No. 6, December 2, 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 |
Okla. Admin. Code tit. 252, ch. 656, app A