March 2014, Vol. 26, No.3

Projects

The new artificial turf field at Trinity-Pawling School (Pawling, N.Y.) will feature a subsurface stormwater management system by CULTEC (Brookfield, Conn.). Engineers at KG&D Architects (Mt. Kisco, N.Y.) collaborated with contractors from Fastracs Inc. (Red Hook, N.Y.) to design and install the system to provide stormwater detention. The team chose the CULTEC’s Recharger 330XLHD®, an efficient chamber that has a lower volume in the early stages of a storm. The design called for a total of 95 chambers in five rows. 
The system features two inlets and one outlet. The turf field has an under-drain network throughout its surface, which connects to a header pipe along the south side of the field and leads into the south side of the system. The second inlet pipe is located at the north side of the system, and handles runoff from a new parking area, walkways, spectator areas, and existing roof drainage systems. Runoff from the parking lot is pretreated in dry swales adjacent to the parking area before discharging into the underground chambers.  
It took approximately a day and a half to install the entire system, and students were able to use the new facility in the fall of 2013.   


UTS Biogas Ltd. (Cambridge, England), a subsidiary of Anaergia Inc. (Ontario, Canada), delivered a large-scale anaerobic digestion facility to Shropshire Energy (Shrewsbury, England). The facility enables the generation of 2.4 MW of renewable electricity, heat for facility operations, and the production of high-grade fertilizer.  
The anaerobic digestion system will produce nearly 20,000 MWh of renewable electricity and 22,000 MWh of renewable heat each year — enough to fully power and heat the company’s 120 Mg/week, mushroom-growing operation, as well as export an additional 8700 MWh of renewable electricity to the power grid. The amount sent to the grid can meet the needs of more than 4000 homes. The anaerobic digestion process also will create a high-grade fertilizer that is used to support local crop growth. 
The anaerobic digestion facility, located near East Cambridgeshire, England, will convert more than 20,000 Mg/yr of waste potatoes, onions, beets, and radishes as well as 36,500 Mg/yr of corn silage into renewable energy and heat. The vegetable waste is fed, alongside the corn, into large fully sealed anaerobic digesters and biodegraded in the absence of oxygen through a natural decomposition process. 
Anaergia Inc. also announced it invested in a large-scale biosolids processing facility in the City of Rialto, Calif. Having acquired the infrastructure and assets of the $160 million facility previously owned by EnerTech Environmental Inc. (Atlanta), Anaergia plans to improve efficiencies, upgrade technologies, and create a state-of-the-art organics processing facility. These investments will enable Anaergia to expand facility processing capacity in the same footprint, while helping cities manage biosolids challenges and divert organic waste from landfills. 
Upgrades to the Rialto facility are expected to be completed in 2015 and will be centered on the construction of advanced anaerobic digesters that will generate renewable energy for facility operations, reduce the volume of biosolids required for heat drying, and enable the acceptance of additional organic wastestreams at the site.  


The Sacramento (Calif.) Regional County Sanitation District (SRCSD) awarded a contract to CH2M Hill (Englewood, Colo.) to provide design and services during construction for the new primary effluent pumping station at its Sacramento Wastewater Treatment Plant. The project is part of SRCSD’s $1.5 billion to $2.1 billion EchoWater Project, a major effort to upgrade the district’s water resource recovery facilities and make them the most advanced in California. 
When completed, the EchoWater Project will enable SRCSD to meet the state’s treatment requirements by removing nitrogen and ammonia from wastewater before it enters the Sacramento River. Additionally, the project provides SRCSD more water reuse and recycling opportunities for irrigation. 
Under the contract, CH2M Hill will design the new primary effluent pumping station to provide the necessary lift within the existing facility’s process stream to accommodate the new treatment process. The project also includes extending the existing primary effluent channel, constructing new diversion pipelines to connect the primary effluent channel to the emergency storage basins, rerouting existing dual 1829-mm (72-in.) diversion lines via a new juncture structure to a 2134-mm (84-in.) chlorinated final effluent line, and controlling odors within the new facilities.   


The Metropolitan Water Reclamation District of Greater Chicago selected TrojanUV (London, Ontario, Canada) to provide one of its water resource recovery facilities (WRRFs) with an ultraviolet (UV) light disinfection system. 

The system, a TrojanUVSigna™, will be installed at the Terrence J. O’Brien Water Reclamation Plant in Skokie, Ill. The activated sludge, single-stage nitrification facility currently discharges secondary effluent into the North Shore Channel of the Chicago River, which is part of the Chicago Area Water System that is designated for primary contact recreational use. Recent regulations have required that the WRRF add a disinfection process to further enhance effluent water quality. 
Trojan will supply14 UV banks equipped with TrojanUV Solo Lamp™ technology. The system will have a flow capacity of 1.7 billion L/d (450 mgd), making it one of the 10 largest WRRFs in the U.S. Of the 30 largest WRRFs in the U.S., Chicago is the first to use UV technology.  


The upgrade of the Maleny Sewage Treatment Plant in Queensland, Australia, will include the GE (Trevose, Pa.) LEAPmbr membrane bioreactor wastewater-treatment technology. The technology is expected to enable the water resource recovery facility (WRRF) to double the amount of water treated to 1 million L/d (0.264 mgd). 
New environmental regulations and expected population growth led Unitywater (Caboolture, Queensland, Australia) to expand the existing Maleny WRRF. The membrane bioreactor technology will help Unitywater to meet environmental guidelines for safe, high-quality water in a recreational area as well as for discharging upstream of a water supply catchment. 
Monadelphous (Perth, Western Australia, Australia), an engineering, construction, maintenance, and industrial services company, will conduct the upgrade to the Maleny WRRF.  


Xylem Inc. (White Plains, N.Y.) reduced the energy consumption at a cargo center pump station at Heathrow Airport (London) by 50%, according to a comparison study conducted by the airport’s Water Services Department. This was achieved by installing Xylem’s Flygt Experior wastewater pumping system. 
The Water Services Department commissioned Xylem to evaluate the airport’s wastewater pumping system in the cargo center area, which hosts heavy volumes of traffic and nonstop activity on a daily basis. Following the evaluation, the Xylem team was charged with developing and implementing a reliable and energy-saving wastewater pumping solution.  
Xylem installed two pumps featuring nonclog technology and two SmartRun intelligent pump controllers in the wastewater wet well of the cargo area. The two pump controllers monitor the specific energy use of the pumps and continually adjust the pump speed to ensure that the minimum amount of energy is being used for all pump cycles without the need for a site visit or system recalibration. 
Since installation, the pumps in the cargo holding area have settled into running at 33 to 37 Hz, reducing the energy consumption of the pump station by approximately half. Maintenance call-out incidents also have been eliminated.  


The European Union granted approximately 1 million euros to fund research and development into a Danish invention for water resource recovery facilities (WRRFs) that makes traditional WRRFs up to 25 times more efficient and reduces costs by as much as 40% due to substantial energy savings. The new system enables WRRFs to produce industrially exploitable fertilizer by accumulating ammonium. 
Inventor Karsten Poulsen patented his method for biologically separating ammonium from wastewater 15 years ago, but recently developed a method whereby the ammonium can be collected instead of released as nitrogen. In principle, a carbon dioxide-neutral wastewater treatment process is thereby achieved. 
The system is expected to be marketed as soon as 2014 under the name GAAR 15 from GreenAqua Solutions (Hobro, Denmark), and the partners in the project are negotiating with interested buyers. The system also is expected to be exported soon to other European countries, such as Germany, which already has a well-functioning structure for wastewater treatment.  


Kruger Inc. (Cary, N.C.) won a contract to provide a Hydrotech Discfilter system as part of the Phase 2B improvements project for a Camas, Wash., water resource recovery facility. Kruger will provide two discfilter units along with a control system. The system is designed to filter a peak flow of 22,700 m3/d (6.0 mgd) and provide an effluent total suspended solids concentration equal to or less than 10 mg/L. The system will replace the facility’s current cloth media filtration system. Its compact footprint will enable it to be installed within the facility’s existing cloth media filtration system.  


The Metropolitan St. Louis Sewer District (MSD) selected Black & Veatch (Overland Park, Kan.) to lead its $35-million incinerator air emissions upgrade program. The program is needed to meet new federal air emission limits for existing and new sewage sludge incinerators (SSIs). 
In 2011, the U.S. Environmental Protection Agency issued new air emission limits for existing and new SSIs, setting a compliance deadline of March 21, 2016. Black & Veatch is working with MSD to install advanced wet scrubbers at its Bissell Point and Lemay water resource recovery facilities (WRRFs) to meet these new maximum achievable control technology (MACT) standards. Wet scrubber technology provides advanced control of particulates, metals, and acid gases from the incinerator exhaust gas to reduce air emissions. Together, the Bissell Point and Lemay WRRFs incinerate 75% of all solids generated by the MSD service area. 
Black & Veatch is providing engineering services for preliminary and final design. The project is expected to bid to general contractors in March 2015. Black & Veatch will provide engineering assistance to MSD during construction. 
Construction is expected to begin by May 1, 2015, with completion in time to test the scrubbers prior to the March 2016 deadline for compliance.