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Technique Sludge Production — Figure 2 (prior page) shows the reduc- tions in total sludge production (primary sludge + waste acti- vated sludge [WAS]) in each year since beginning treatment. The WWTP also produced less WAS with the bioaug- mentation process. Prior to treatment, the WWTP produced ~595,000 dry pounds of WAS per year. During the same seasonal period, (September to August), the activated sludge system produced ~346,000 dry pounds of WAS per year. During the first 12 months, the activated sludge process pro- duced ~42% less WAS. Similar reductions in WAS production for the years 2009, 2010, and 2011 were also observed with continued IPT treatment. Other Operational Savings — Besides the reduction in costs associated with sludge and aeration energy, a reduction in the amount of manpower needed for operation and main- tenance throughout the WWTP was observed. Specifically, the amount of manpower required for cleaning the overflow weirs and effluent channels in the clarifiers is reduced, along with the overtime labor that was required for operating the sludge press. Further, the stormwater pond cleanings (required after each storm event when they are utilized) has consistently taken fewer man hours to clean per year. The improve- ment in effluent TSS now allows the WWTP to utilize secondary effluent for non-potable utility water, saving 50,000 gallons per day of city water, totaling $60,720 annually. The collection system has been maintained in good con- dition with no odor complaints logged. Combined sewer over- flows (CSOs) have been reduced 92% due to FOG elimination in the collection system. Return activated sludge (RAS) flow dropped by 29% saving $1,000/month. Additionally, the plant has maintained superior effluent water quality of 1.4 mg/L BOD, 1.5 mg/L TSS, and less than 1.0 mg/L ammonia. Conclusion Using sewer collection system bioaugmentation technology to enhance the microbial activity in the collection system and the WWTP is a proven technology to overcome the challenges associated with age-old biological treatment processes, and improve the performance of WWTPs without capital expansion. wateronline.com ■ Water Online The Magazine, Wastewater Edition 13 Dr. Bulbul Ahmed serves In-Pipe Technology as research and development manager. His research interests include biofilms, biological wastewater treatment, waste to energy conversions, and bacterial metabolisms. Dr. Ahmed has authored one book chapter, peer reviewed journals, conference papers, and magazine articles. Dr. Ahmed is affiliated with WEF and CS-WEA professional organizations. Andrew Newbold serves In-Pipe Technology as project engineer. With more than seven years experience in the water treatment industry, Mr. Newbold manages the application and implementation of In-Pipe's service, provides technical assistance, and provides application engineering and technical advice. Rich Schici serves In-Pipe Technology as senior engineering manager. With more than 10 years experience in the wastewater and water sectors, including process modeling and treatment plant design, Mr. Schici is a high-level technical resource. He is affiliated with seven different environmental agencies including WEF, WERF, and Central States WEA. With Orival Self-Cleaning Water Filters MembranePretreatment,CoolingTower, Mining&IndustrySpecificWaterFiltration; See us at WEFTEC 2012 Booth 1705 Automatic Self-Cleaning WATER FILTERS www.orival.com • filters@orival.com (800) 567-9767 • (201) 568-3311 • Fax (201) 568-1916 213 S. Van Brunt St., Englewood, NJ 07631