WEST LAFAYETTE, IN -- Constructed wetlands in planned communities can aid in surface water cleanup and flood prevention, according to Purdue University scientists who completed a five-year study on the management system.

The research, begun in 1998 on three constructed ponds, or wetland cells, on a newly renovated golf course on the university campus, showed that 11 of 17 measurable chemicals in surface water were reduced after running through the system, said Ron Turco, soil microbiologist and senior author of the report. Study results are published in the February issue of the journal Ecological Engineering.

"Golf courses are a perfect place for constructed wetlands used as part of a water management system because wetlands can filter chemicals out of surface water, and they can also store excess water during storms," Turco said.

"Constructed wetlands on golf courses and in planned communities are a very good water management system," Turco said. "When you build houses, roads and driveways, lots of hard surface is added, leaving no place for water to go. Building dikes and levees just moves the water problem somewhere else, causing flooding elsewhere."

The researchers evaluated a three-pond system on Purdue's Pete Dye-designed Kampen Golf Course in order to study the quality of the water from when it entered the golf course until it exited into a holding pond or a recovering natural wetland, the Lilly Nature Center's celery bog, in West Lafayette.

The almost 11,000 water plants placed in the ponds are responsible, along with microbes, for retaining or degrading the various chemicals associated with surrounding urban sprawl and the course itself. Some of the chemicals found in entering water included atrazine, chloride, nitrate, ammonia, nitrogen, organic carbon, phosphorus, aluminum, iron, potassium and manganese. In all, 83 chemicals were monitored, but only 17 were present in measurable amounts.

The other researchers involved in this study were Eric A. Kohler and Zac Reicher both of the Department of Agronomy, and Vickie L. Poole, of the Department of Forestry and Natural Resources. Turco and Reicher also are members of the Purdue Turfgrass Program.

The United States Golf Association, Indiana Water Resources Research Center and U.S. Environmental Protection Agency Region 5 provided funding for this study. Golf course architect Dye was instrumental in designing Purdue's Kampen course and securing support for the use of the wetlands. Spence Restoration Nursery provided the wetland plants and Heritage Environmental, Indianapolis, provided water sample analysis.

Source: http://www.purdue.edu/

Weekly Update : Iraq Reconstruction

Washington, DC -- USAID's goal is to improve the efficiency and reliability of existing water and wastewater treatment facilities, especially those in the south where water quantity and quality are particularly low. An anticipated 11.8 million Iraqis will benefit from USAID's $600 million in water and sanitation projects.

Highlights this week

-USAID’s work to rehabilitate the Rustimiyah North Wastewater Treatment Plant is about 80% complete. One of the plant’s two processing systems has begun to receive sewage flows allowing for operation at about half of its capacity, or 179,000 cubic meters/day. Final inspections have begun on the functioning system and will continue through the first week of March. Hydrostatic testing of piping and installation of gratings is ongoing. Both systems are expected to be complete by the end of April. About 33% of Baghdad’s effluent sewage flow from 4.8 million people is collected by sewer trunk lines and conveyed to this sewage treatment plant.

-A Community Association of a municipality in Babil Governorate worked with the Community Action Program (CAP) to install a 1,250-meter water pipe connecting the neighborhood’s potable water network to the city’s water system. This neighborhood, with a population of 5,600, had been deliberately neglected under the former regime, and the existing potable water network had not been maintained for decades. The network was not sufficient to serve the needs of neighborhood residents. The 10-member community association agreed that this was their first priority.

-A CAP project improved the sanitation standards of the Immarat neighborhood in Baghdad by supplying mobile garbage bins and removing existing garbage from the area. After the war, trash pickups in Immarat became sporadic. Often, garbage collectors would skip routes in poor areas to work in neighborhoods where residents would tip collectors for extra service. Consequently, poor neighborhoods such as Immarat became massive dumps. In addition, garbage containers in the residential complex were either looted or too old to be used. A part of the community contribution is to ensure the sustainability of the project by arranging for the daily arrival of garbage collectors to the area.

-Engineers are implementing the Baghdad Water Distributions Mains project with USAID support. This undertaking involves modeling the distribution system and repairing, replacing and installing new water pipes in Sadr City. The modeling task, constituting 20% of the project, will collect data on and conduct a survey of major water mains in the city. The remaining eighty percent of the task will include extensive repair and replacement of mains, distribution pipes, and valves. With 25km of pipe installed as of late February, USAID expects to complete the project by the end of December 2005.

Source: USAID, http://www.usaid.gov/

WARRENDALE, PA -- USFilter recently obtained ANSI/NSF Standard 61 certification for its HS730 "Loop Chain" composite collector chain for water treatment plants. The collector chain is attached to flights that move across the bottom of a rectangular tank, collecting settled solids. The Loop Chain is specifically designed for extra-long tanks that experience higher-than-normal loading.

"The certification signifies the collector chain can safely treat drinking water," explains William Selle, P.E., chain products engineer for USFilter. "The Loop Chain is just one of many rectangular collector chain and scraper components from USFilter that are ANSI/NSF Standard 61 certified."

Standard 61 certification addresses crucial aspects of drinking water system components, namely whether contaminants that leach or migrate from the product/material into drinking water are above acceptable levels in finished waters. The standard addresses possible health effects of treatment chemicals and related impurities that are considered contaminants for evaluation purposes.

The USFilter chain and scraper sludge collector system is suitable for water plant service, as well as for primary and secondary wastewater and storm water collection at treatment plants. It provides maximum sludge concentrations and scum or floating solids removal with minimal fuss, regardless of the size or application.

USFilter Corporation, a Siemens company, delivers cost-effective, reliable water and wastewater treatment systems and services to municipal, industrial, commercial and institutional customers worldwide. USFilter is part of Siemens. Visit company websites at www.usfilter.com  and www.siemens.com

. WEF Commemorates World Water Day 2005 The Water Environment Federation (WEF) will join the United Nations (UN) on Tuesday, March 22 in commemorating World Water Day 2005.

Biotechnology Selected for Treatment of PCP-Impacted Soil
Daramend to remediate approximately 6,000 tons of soil impacted with pentachlorophenol (PCP) at a former manufacturing facility located in the Pacific Northwest.
 

Koch Membrane Systems Offers The SR2 Nanofiltration Membrane The SR2 membrane from KMS significantly lowers operating costs for water softening, wastewater BOD and hardness reduction, and wastewater recovery.

Click here to visit the News Center...

People post their requests for help and offer their suggestions to others in our open forum.

Mr. Cooper needs help with biosolids odor:

Any idea's how to reduce biosolids odors at the storage site. We seem to have more odor than others using the same site for storage. Both sites are using a centrifuge for dewatering.  (Click here to post a reply)

Timothy Cooper
City Of Yakima
tcooper@ci.yakima.wa.us

Mr. Palmer wants to calculate the SRT/MCRT:

I read in an operations book published by the Texas Water Utilities Association that SRT (sludge retention time) is the also called MCRT (mean cell residence time). Is this true, because the book gives the formula as follows:

Vc = Volume of contact basin, million gallons.
Vr = Volume of reaeration basin, million gallons.
Cc = Concentration of Suspended solids in contact basin, mg/L
Cr = Concentration of suspended solids in reaeration basin, mg/L
Ce = Concentration of suspended solids in effluent, mg/L
W = Influent wastewater flos, MGD
Qw = Waste sludge flow, MGD

SRT(days) = [/u]VcCc + VrCr[u]
QwCr = (Q - Qw)Ce

Is this the way to figure the MCRT?   (Click here to post a reply)

Thanks,
William Palmer
City of Hamilton
wwtp@ci.hamilton.tx.us

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Water/Wastewater Plant Operator - Arizona

NAA Services Corporation in Gila Bend, Arizona is looking for a Water/Wastewater Plant Operator.

Must have 2 years experience at base or municipal level.  Water plant license Grade I, Distribution License Grade I, Wastewater license Grade II and collections systems license Grade I.  Backflow certification a plus.

Qualified applicants should fax or email their resume to 703-263-7893; naasvc@erols.com for immediate consideration.

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Filtering water - using wetlands or nano-technology, your choice in this week's newsletter, read on!

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