Fort Walton Beach Resolution — 2009-20-Wastewater Interlocal Agreement — reading text

I .~ 0 ffi "' C 0 10 ": . g I '" I .. Q d ,., c CD : t f 0 c 0 3 .. >- .. a. "5 Ii . i c 0 I: 0 L ~ 1/1 .. ~ 1 1! t a. a.. ~ ~~~~~~~~~~~~~~~~~~~ oj P~~~ I~~~~ 0 I- a.. .:j j ~ U .,; a.. 0 .,..:  lof6 APPENDIX F ARBENNIE PRITCHETT WRF Appendix F - The Arbennie Pritchett Water Reclamation Facility Okaloosa County is implementing a $ 65M program to construct the new 10 million gallon WRF) that will replace the per day (mgd) Arbennie Pritchett Water Reclamation Facility ( Garniers Wastewater Treatment Plant ( WWTP). The new WRF will provide new and aging improved technology, will have the capacity to serve a larger service area, will provide enhanced operational performance, and will remove the existing Garniers WWTP from the ever increasing residential congestion at its current location. The new WRF is under construction at the existing Garniers spray field property that is located on Eglin Air Force Base ( AFB) property that is leased from the Air Force for this use. Construction is expected to be completed in September 2009. This program includes several elements Design- Build of the 10 mgd Arbennie Pritchett WRF Design and Construction of the 25 mgd Garniers Re- pump Station Design and Construction of 200 acres of rapid infiltration basins ( RIBs) 2- 20- inch Design and Construction of "tie- ins" and new piping and valves to convert diameter reclaimed water force mains to raw sewer mains main to the new Design and Construction of new 36- inch diameter raw sewer force Arbennie Pritchett WRF The new WRF will be designed to treat an influent average daily flow of 10 mgd and a peak Provisions for hourly flow of 25 mgd, based on USEPA Class 1 Reliability Requirements. have been incorporated in the future expansion to 15 mgd and 37. 5 mgd respectively, and construction of the headworks, ultra- violet light ( UV) disinfection, and effluent design and support pumping facilities. The new WRF will consist of four major process areas facilities as described below: Pretreatment Process Biological Treatment Process Effluent Management Biosolids Management Support Facilities Pretreatment Process The pretreatment processes are intended to provide gross removal of large solids and grit to consist influent flow protect downstream equipment. Pretreatment process components monitoring, influent composite sampling, mechanical and manual screening, screenings odor control, and washing and dewatering equipment, grit removal and handling equipment, been designed and septage receiving equipment. The pretreatment facilities have constructed to provide complete redundancy and have the hydraulic capacity to meet an flow of 37. 5 mgd. average daily flow of 15 mgd and the future peak hourly  2of6 Biological Treatment Process The biological treatment process is intended to remove or reduce organic constituents, nutrients, and suspended solids from the wastewater. Treatment includes activated sludge bioreactors, secondary clarification, and return activated sludge ( RAS) and waste activated sludge ( WAS) pumping. The process is designed and constructed to meet the influent loadings based on an average daily flow of 10 mgd and the future peak hourly flow of 25 mgd. The activated sludge bioreactor system is furnished to provide necessary biological treatment of the wastewater to meet permit conditions, and is designed to reduce carbonaceous biochemical oxygen demand ( CBOD), ammonia, nitrite, and nitrate to the prescribed effluent treatment levels, when this process is followed by secondary clarification. The two biological treatment basins are configured with influent entering an anoxic zone to provide both anoxic selector and denitrification when combined with the nitrate rich internal recycle ( NRCY) from the aeration zone. The effluent from the anoxic zone flows into the aeration zone for biological treatment and oxidation of the influent CBOD and ammonia. Mixed liquor suspended solids ( MLSS) flow from the aerobic zone to a second anoxic/ aerobic process where further reduction in the levels of CBOD, nitrate, and nitrite occur before the MLSS flows to the two secondary clarifiers. The secondary clarifiers provide liquid- solids separation and are designed based on USEPA Class 1 Reliability Requirements. The RAS pumping system is provided to return MLSS that have settled in the secondary clarifiers to the activated sludge biological treatment basins before the first anoxic zone. The WAS pumping system is provided to remove a portion of the MLSS from the secondary clarifiers to the solids digestion process. Figure F1 is a process diagram of the facility. Effluent Management Effluent management includes UV disinfection and effluent pumping and an in- plant reclaimed water system for process operations and landscape irrigation. The effluent management structure includes the new UV light disinfection system, as well as the pumping wet well for the effluent and in- plant water pumps. The structure has equipped to handle the current average daily and peak flow of 10 mgd and 25 mgd respectively; but has been designed and constructed to accommodate additional equipment to meet the future average daily and peak hourly flows of 15 mgd and 37. 5 mgd. The new UV disinfection system equipment shall disinfect the clarifier effluent to the limits prescribed in the permit. The UV system shall implement low pressure high intensity lamps arranged in open channels where the water shall flow by gravity continuously. The new effluent pumps consist of three vertical turbine pumps designed to pump the peak hourly flow of 25 mgd to the new RIBs.  k- 4'-' ... 3of6 u. a:: 5= E J: t- 0- W Z m co a::: 6 5= o J U. fI) fI) w o 1 a:: 151: eel. III CIJ. 0- ell u..a. cll u. 800 a.1II . en is u: