Success Stories - Prodex
BAE has been an invaluable tool for our WWTP, increasing our biogas production for reuse onsite and decreasing our energy demand on utilities. I’d highly recommend BAE to fellow wastewater treatment professionals.
Since implementing the use of BAE® in the digester, Landis Sewerage Authority (LSA) has vastly improved not only digester performance, but also increased the efficiency of the CHP system. The EPA recognized the results of this outstanding performance and awarded LSA with the EPA 2010 ENERGY STAR Award.
Like many wastewater treatment facilities across the country, Joint Meeting of Essex and Union Counties (JMEUC), a 55MGD facility, was looking to increase their digester gas production. They were introduced to BAE, and a protocol was developed to feed the digesters at a rate of 28 gallons per day. Digester gas production began to increase at 30 days into the evaluation. After the second 30 day period the digester gas production had increased 52%. Additional benefits realized included a drastic reduction in centrate solids returned to the treatment plant for processing and a 35% reduction in pounds of polymer per dry ton of solids dewatered.
Annual Gross Savings total $1.2 Million
Hayward Water Pollution Control Facility (HWPCF) treats an average dry weather daily flow of 11.9 MGD, with peak daily flows averaging 18.5 MGD. An independent third party was brought in to validate the benefits of BAE® and perform an in depth review of the data and relative equipment. All inconsistencies were taken into account and extracted from the provided data. The resulting conclusion shows a positive effect. The addition of 6 gallons per day of BAE® from May 23, 2011 to December 31, 2011 significantly increased the production of biogas by 36%, which in turn resulted in an increase of kWh generated on-site by the engines. In addition, a substantial decrease in volatile solids was noted.
The Gloucester County Utilities Authority (GCUA) WWTP is currently permitted to treat 24.1 MGD, and the plant treats leachate from the local landfill, as well as septage that is hauled to the plant. Gloucester County is a well operated wastewater treatment plant, however, due to the record rainfalls in August and September 2011, the plant experienced influent flows of 53 MGD, and the plant biology was depleted. In addition, the amount of leachate delivered to the plant increased more than five fold. Truckloads per day increased from 12 truckloads per day to 63 truckloads per day, creating an ammonia problem in the aeration basins. As a result, chlorine demand was at a very high level. Plant operations were disrupted due to lower detention times and solids wash outs. BAE® proved to be GCUA’s go-to tool to solve the unexpected problems that can arise. Within just a matter of days the operations of the aeration basins were stabilized and back to normal.
Lewistown WWTP had a particular challenge during heavy rain events, which included the possible loss of solids from the final clarifiers due to high plant influent flow conditions. Filamentous bacteria had overwhelmed the treatment biology during late winter and early spring as the wastewater temperature began to increase. To compensate for the possible loss of solids, polymer was added to the secondary clarifiers and bacteria were added to the primary clarifier effluent.At the conclusion of the 60 day cycle, both polymer and bacteria were discontinued and the microorganism population was in complete order.
The Cumberland County Utility Authority (CCUA) began using BAE in their primary anaerobic digester because they were having difficulty maintaining the minimum volatile solids destruction (VSD) of 38% required by the NJDEP for land applying sludge.
BAE had clearly demonstrated that a balance between the acid formers and methane formers had been created and a stimulating effect was taking place within the primary digester, improving the performance of the two-stage secondary digester. Dewatering by the plants centrifuge machine improved, receiving digested sludge as high as 6% creating a dewatered cake at 25 to 28%.
BAE is benefiting communities everyday. Read six brief summaries of BAE at work in our Renewable Energy Brochure.