GORMAN-RUPP VG3B3-B, Installation, Operation And Maintenance Manual

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Design Notes
AUGUSTA CORRECTIONAL CENTER VA / Design#: 131349
Pre-SBR
- Pre-AquaMB treatment includes Flow Equalization.
- Neutralization is recommended/required ahead of the SBR if the pH is expected to fall outside of 7.5-8.0 for significant
durations.
- Coarse solids removal/reduction is recommended prior to the SBR.
SBR
- The Maximum flow, as shown on the design, has been assumed as a hydraulic maximum and does not represent an additional
organic load.
Aeration
- The aeration system has been designed to provide 1.25 lbs O2/lb BOD5 and 4.6 lbs O2/lb TKN at the design average loading
conditions. A peaking factor of 2 has been added for the aeration system design to account for fluctuations in the influent
loading.
Process/Site
- The anticipated effluent Nitrogen requirement is predicated upon an influent waste temperature of 10 °C or greater. Nitrification
and Denitrification below 10 °C can be unpredictable, requiring special operator attention.
- Sufficient alkalinity is required for nitrification, as approximately 7.1 mg alkalinity (as CaCO3) is required for every mg of NH3-N
nitrified. If the raw water alkalinity cannot support this consumption, while maintaining a residual concentration of 50 mg/l,
supplemental alkalinity shall be provided (by others).
- Provisions for a supplemental carbon source are required in order to facilitate proper Denitrification.
- Provisions for chemical addition in the form of Alum, Carbon, and Alkalinity to the SBR reactors will be provided by others.
- Provisions for chemical addition in the form of Alum to the SBR decant lines and the Digesters will be provided by others.
Anticipated
- The effluent Total Nitrogen Limit of 3 mg/l is assumed to be comprised of 1.5 mg/l Organic Nitrogen, 1.28 mg/l NOx-N, and 0.22
mg/l NH3-N.
- The ability to meet 1.5 mg/l effluent organic nitrogen is contingent upon the system's ability to hydrolyze the influent organic
nitrogen to NH3-N. A certain fraction of the organic nitrogen may be refractory and, therefore, will not be biologically converted.
- The ability to meet the required Nitrogen limit will require strict operator attention of the process. The system shall be operated
in accordance to the O&M manual instructions.
Post-SBR
- Post Aeration follows the UV system. The aeration system is designed to raise the D.O. to 7.1 mg/l.
Filtration
- Aqua-Aerobic Systems recommends covering cloth media filters in environments where bright sunlight is expected to cause
excessive algae growth.
- The anticipated effluent quality is based upon filterable influent solids.
- For this application, pile filter cloth is recommended, which has a nominal pore size of 10 microns.
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