June 2013, Vol. 25, No.6


Grundfos (Bjerringbro, Denmark) was a primary supplier for a large-scale project to refurbish and expand the Kubratovo water resource recovery facility (WRRF) in Sofia, Bulgaria — the largest WRRF in the Balkans.  

The WRRF at Kubratovo, which has been in operation since 1984, treats domestic wastewater, process water, and stormwater from Sofia. Pumping 480,000 m3 of wastewater from a population equivalent of 1.3 million people, the Kubratovo WRRF meets the wastewater requirements of 90% of the city’s population. On March 30, 2009, the facility began a massive refurbishment and expansion project. Grundfos contributed products, technology, and project and logistics know-how to the project. 

The project included refurbishment and reconstruction of four primary sedimentation tanks, six biotanks, six secondary sedimentation tanks, and mud and floating substances pits. Additionally, two new secondary sedimentation tanks, a pumping station for recirculation of activated sludge, a mud water tank, a reagent plant, and a power substation were built. Additional underground infrastructure that was approximately 4 km in length also was built. It included pipelines for process water. The second part of the project included construction of the Novi Iskar SPS, a town in western Bulgaria, and refurbishment of the collection system in the region.  

Following completion of the planned construction work, the capacity of the plant was increased to a maximum stormwater flow of 850 L/s. Also, 5 km of collection system in the town of Novi Iskar were refurbished. A rising main was built using fiberglass pipes with a total length of 5.6 km. 

The entire project was completed on time 20 months later, at the end of 2010. 

Layne Heavy Civil Inc. (Orleans, Ind.) will design and construct a wastewater collection and transmission project for the Cudjoe Regional Wastewater System in Monroe County, Fla. Engineering on this $80 million design–build project has begun, and construction is scheduled to begin in July and last approximately 2.5 years. The project is the largest ever for Monroe County in terms of value and number of customers affected. 

The State of Florida mandated that all customers within Monroe County be connected to an advanced water resource recovery facility before Dec. 31, 2015. This project will help eliminate untreated wastewater from polluting the waters of the Florida Keys. 

The project consists of wastewater service to the islands of Ramrod Key, Lower Sugarloaf Key, Little Torch Key, and Big Pine Key. The collection system affected includes approximately 152,400 linear m (500,000 linear ft) of gravity sewer and low-pressure grinder sewer, with 40 neighborhood lift stations that serve approximately 4500 customers. The transmission system consists of four master pump stations and a polyvinyl chloride and high-density polyethylene pipeline laid along U.S. Highway 1. 

Wastewater is being transferred to the central Cudjoe treatment facility, currently under construction. 

The project agreement was signed with the Florida Keys Aqueduct Authority, which is acting as program manager on behalf of the Monroe County Commission, which is funding the project. 

H20 Innovation Inc. (Quebec City, Quebec) last year designed and installed a new municipal water treatment plant for Emmons County, N.D., to treat water drawn from the nearby Missouri River. The new plant relies on a filtration system by Dow Water & Process Solutions (Edina, Minn.) that combines ozone pretreatment for removal of organics. DOW Ultrafiltration membranes remove pathogens and solids down to the 0.03-µm level, and DOW FILMTEC™ reverse-osmosis membranes remove salinity, additional taste, and odor.  

CH2M Hill (Englewood, Colo.) was selected by South Oil Co. (Basra, Iraq) to provide project management consultancy services for the Iraq Common Seawater Supply Project (CSSP). CH2M Hill will manage approximately $3.5 billion to $4 billion worth of Phase 1 of CSSP, which involves the treatment, transmission, and distribution of 5.2 million barrels of water per day of seawater. The ultimate build-out capacity of the facility is anticipated to be approximately 12.5 million barrels of water per day.  

CSSP is considered a critical infrastructure project by the Iraqi government and the Ministry of Oil, because it will provide much-needed injection water to the oil fields of southern Iraq. The oil fields will use the seawater for enhanced oil recovery — water is injected into the reservoir, enabling increased oil production. The project officially started in January and is scheduled to be ready for operation in mid-2017, after which CH2M Hill will provide continued services and support through operations and maintenance. 

As CSSP progresses, CH2M Hill will provide high-priority engineering site surveys; environmental, safety, and health impact assessment; front-end engineering design; construction packages for site preparation and nonprocess buildings; and engineering, procurement, and construction packages for the process, power plant, pumping facilities, and pipelines. 

Egyptian Ethylene and Derivatives Co. (ETHYDCO; Cairo, Egypt) awarded a contract to Aquatech (Canonsburg, Pa.), a provider of water purification technology for industrial and infrastructure markets, to design and install a water resource recovery facility that includes the first integrated zero-liquid-discharge (ZLD) plant in Egypt.  

The ZLD plant will be installed at ETHYDCO’s petroleum derivatives manufacturing site in Alexandria, Egypt, where the company produces ethylene and other petroleum derivatives. The plant will treat wastewater from the water resource recovery facility and cooling-tower blowdown to get cooling-tower makeup water, boiler feed water, and achieve ZLD. The technology provided is a microfiltration system, a high-efficiency reverse-osmosis (HERO™) system, followed by fractional electrodeionization (FEDI™) and a brine concentrator, and finally, a crystallizer and sludge treatment system. 

The project is expected to be completed in 13 months. 

Eden Park Illumination (Champaign, Ill.) was awarded a $1 million grant from the U.S. Department of Energy to commercialize microplasma ultraviolet (UV) lighting tiles for water purification and sterilization. Eden Park will develop and demonstrate large-scale microplasma/microcavity UV-flat lamps in the wavelength range of UVB to UVC, having tile areas up to 0.9 m2 (1 ft2) for water purification and disinfection. 

The grant’s objective will be to demonstrate large-scale products for thin microplasma UV-flat lighting systems having a radiating area up to 0.9 m2 at a UV-conversion efficiency greater than 20%. A scaled production methodology will be put in place, and an optimized power delivery system will be designed and developed according to the scale of each size class of microplasma lamps. Also, lamps with other emitters (molecular gas emitters or UV-conversion phosphors) capable of generating photons in various UV wavelength ranges between 172 and 310 nm will be developed to provide a broad range of UV applications for water treatment. 

Severn Trent Services (Coventry, England) recently signed a contract with Tianjin Machinery and Electric Equipment Import and Export Co. Ltd. (Tianjin, China), to provide its TETRA® Denite® denitrification filter technology to the Tianjin Jinnan Wastewater Treatment Plant Phase 1 project. The Phase 1 project has a daily capacity of 499,000 Mg (550,000 ton), making it the largest DeniteDeepBed filter in China.  

TETRA Denite is a fixed-film biological denitrification process that also serves as a deep-bed filtration system capable of removing total nitrogen and total suspended solids from wastewater in a single step. The denitrification installation during Phase 1 will ensure that the Tianjin Jinnan plant meets the Class 1A wastewater discharge requirements for total nitrogen that were recently established due to the implementation of water resource management regulations, which enforce high-quality standards on wastewater treatment and discharge, as well as recycled water. The Severn Trent Services design uses 30 filters, each measuring 28.45 m × 3.56 m, for a total filter area of more than 3000 m2.  

The Phase 1 project is set to begin in October. 

S evern Trent Services (Fort Washington, Pa.) recently signed a contract to provide its turnkey chlorination system Capital Controls® technology in the first construction phase of the Chengdu Seventh Tap Water Plant in Chengdu, China. The system will be the largest chlorination system installation in Chengdu, with a cost-effective, end-to-end system.