April 2013, Vol. 25, No.4

Projects

The City of Maumee, Ohio, will upgrade its water system with an advanced metering infrastructure (AMI) network by Mueller Systems (Cleveland, N.C.). Mueller Systems will provide the city with the Mi.Net® Mueller Infrastructure Network for Utilities, a two-way AMI network that will automate the city’s meter-reading-to-billing process by linking its meters, distribution sites, and control devices to a single data network. 

The system provides on-demand meter readings, e-mail alerts, and alarms, based on near real-time information, as well as the ability for utilities to better manage their water and electric resources through ongoing access to customer data and information. Its Web-based consumer portal enables consumers to view their current and historic water consumption levels online and set budget and conservation goals. 

In addition to implementing the Mi.Net system, the city will replace all residential water meters in its service area with Mueller Systems’ Hersey® 400 Series Bronze Positive Displacement meters. It also will replace all of its compound water meters with Mueller Systems’ magnetic flowmeters to more accurately measure water flow with minimal head-pressure loss.  

The City of Indianapolis approved a pipe manufactured by Prinsco (Willmar, Minn.) for use in stormwater projects that specify a high-density polyethylene (HDPE) pipe. Prinsco’s ECOFLO 100 dual-wall pipe is made with a minimum of 40% recycled content and passed extensive review by Indianapolis Testing Laboratory to verify its 100-year service, past product performance, and conformity to application standards. The results prompted Indianapolis to update its previous project specification, which required the use of only 100% virgin-HDPE pipe. Indianapolis is one of the first municipalities to specify ECOFLO 100 as a virgin-HDPE equivalent.  

GE (Trevose, Pa.) will install its zero-liquid discharge (ZLD) wastewater treatment technology at two new 758-MW natural-gas-fueled, combined-cycle power plants in Texas. In recent years, Texas has experienced a drought, and by using the ZLD technology, the two power plants, located in Sherman and Temple, will be able to reduce incoming water needs. 

The Temple Power Plant will use treated water from a nearby water resource recovery facility, and the Sherman Power Plant will use Lake Texoma as its cooling-water source. The ZLD systems will treat 1703 L/min (450 gal/min) of water for each plant, more than 98% of which can then be reused.  

GE’s brine concentrator and ZLD crystallizer technology were selected for the projects based on their record of reliability, performance, high-quality materials, and modularization, as well as GE’s ability to meet the demanding schedule and reliability requirements for both power plants. 

Panda Power Funds (Dallas) owns the two power plants, and Bechtel (San Francisco) will serve as the engineering, procurement, and construction contractor.  

The Kingdom of Saudi Arabia’s Ministry of Water and Electricity awarded a contract to Headworks (Houston), a designer and manufacturer of advanced wastewater treatment processes for municipal and industrial facilities, to design a moving-bed biofilm reactor (MBBR) system to upgrade an activated sludge plant in the kingdom’s Eastern Province. Under the terms of the agreement, Headworks will execute the process design and supply the core components of the MBBR system, including media, aeration grids, and media retention screens. Headworks also will use its ActiveCell ® 920, offering 680 m2/m3 of protected surface area. The MBBR system will achieve biochemical oxygen demand reduction and nitrification, producing effluent suitable for reuse and irrigation applications.  

Guarantee Electrical Co. (GECO; St. Louis) is installing electrification and process control at a new $55.6 million municipal water resource recovery facility being built by Cape Girardeau, Mo., and updating its existing facility. The new facility, which will bring the city into compliance with federal and state wastewater treatment regulations, will have an average capacity of 42,000 m3/d (11 mgd) and a peak capacity of 190,000 m3/d (50 mgd). It will supplement the city’s existing 26,000-m3/d (7-mgd) facility that opened in 1962. 

GECO is installing electrical switchgear; process equipment instrumentation; and alarm, security, and voice/data systems. In the existing plant, GECO is performing selective disconnection and demolition, followed by updates to certain control systems. GECO also will oversee specialty subcontractors responsible for testing, infrared testing, and lightning protection installation.  

Horizon Regional Municipal Utility District (HRMUD; Horizon City, Texas) selected Severn Trent Services (Fort Washington, Pa.) to provide contract management and operations and maintenance services for the district’s water and wastewater systems through a public–private partnership. Severn Trent also will provide meter reading, customer service, and billing for HRMUD. The HRMUD water treatment plant uses reverse osmosis and has been rated a Superior Water System by the Texas Commission on Environmental Quality. The plant has a treatment capacity of up to 30,000 m3/d (8 mgd), while the water resource recovery facility has a capacity of 11,000 m3/d (3 mgd).  

The City of Garretson, S.D., will be the first in the country to deploy a combined water and natural gas advanced metering analytics solution by Badger Meter (Milwaukee). The city decided to replace its existing walk-by/drive-by automatic meter-reading system with a more advanced ORION ® Smart Endpoint solution that enables meters automatically to transmit readings to a central location throughout the day. Coupled with the ReadCenter ® Analytics software, it will provide more-timely and efficient readings and information that will help the city proactively manage its utility operations.  

The Town of Taralga, Australia, awarded a contract to Xylem Inc. (White Plains, N.Y.), a global water technology company, to develop a customized water treatment system. Xylem will produce a containerized solution using GE (Trevose, Pa.) ZeeWeed membrane technology that will provide high-quality drinking water for 300 people in the remote town. Construction began in January, with delivery scheduled for July. 

Xylem has designed the water treatment system for Taralga to be compact, durable, and flexible enough to allow for increases in output if required in the future. Because the main raw water source for the system is a river, key challenges for the solution are algae and high variations in incoming turbidity, which can spike as high as 80 nephelometric turbidity units. In addition, since the water temperature in the region drops to 5°C during winter, the plant has been designed with the ability to treat cold water at a similar rate as the water temperatures experienced during warmer months.  

Gresham, Smith, and Partners (GS&P; Nashville), a leading multidisciplinary design and consulting firm, completed its expansion and renovation efforts at the Bowling Green (Ky.) Wastewater Treatment Plant, a property of Bowling Green Municipal Utilities (BGMU). The improved facility was designed to meet existing and future effluent requirements, including removal of total nitrogen and phosphorus, and to implement sustainable and cost-effective solutions for handling and disposal of biosolids.   

To expand treatment capacity within limited space, GS&P’s plan called for a 57,000-m3/d (15-mgd) sequencing batch reactor to replace the 40,100-m3/d (10.6-mgd) aerated biotower facility. The new facility is the largest sequential batch reactor in the United States and will provide more-efficient processing for higher volumes. It achieves current standards for effluent nutrient levels and can be retrofitted easily with microfilter or ultrafilter membrane technology should future standards become even more stringent. 

The expanded facility also incorporates an indirect thermal dryer that will convert biosolids into 11.3 dry Mg/d (12.5 dry ton/d) of a sustainable Class A product that can be used as an agricultural soil supplement. The project includes a Therma-Flite IC 10000 dryer, the first to be used for municipal biosolids, which can process 4500 kg/h (10,000 lb/h). It was installed in response to BGMU’s concerns about its existing method, which involved dewatering biosolids in a single centrifuge and hauling the waste 64 km (40 mi) to a landfill. The thermal dryer represents an environmental and economic improvement over this previous practice, as it promotes sustainable use of waste and is projected to reduce BGMU’s residuals management costs by at least 50% per dry ton.