Warsaw WWT Utility
"We had two problems that were due to the secondary clarifiers. The first one was the amount of algae growth on the weirs and effluent channel. The second problem was the amount of time we spend dealing with the algae. The algae would break off naturally ordering cleaning and plug the UV System.
The first attempt to prevent this problem from occurring was to install a screen in front of you the UV system. This helped but we still had problems with the UV System plugging. We were also cleaning the weirs and channels weekly...(and) this screen also needed to be pulled at least once per week to clean it.
We looked at several options to clean the weirs and channel. After talking to other utilities, we contacted the Ford hall company to inquire about the Weir-Wolf System. (Since installation from April 1- October 31, 2009) we do not have a single problem with the UV System clogging for the entire disinfection season. We also reduced our man hours spent cleaning to just a couple of hours per week. The brush life has been very good. We did not have to replace any of the brushes for the entire time in use.
The Ford Hall Company has been excellent to work with. The installers sent to the plant were professional....(and) also provided training to the staff on the operation and maintenance of the Weir-Wolf. The utility is currently considering installing the Weir-Wolf in (a) second clarifier.
I would recommend the Ford Hall Company and the Weir-Wolf System."
Brian Davison, Utility Manager; Warsaw WWT Utility; Warsaw, IN
Vicksburg Water Pollution Control Center
"We have been pleased beyond words with our custom designed Weir-Wolf System your crew installed approximate one year ago. We have found that when we began our RMP/PSM program development that the system eliminated the unsafe entry to the launders by personnel for cleaning purposes. The more time passes the more we realize just what a blessing they truly are. ... We're so pleased, we plan to work towards having the system installed on our primary clarifiers as well as soon as budgets permit. Please have your folks stop by when they are in the area. We enjoy a showing off our system, even if it is to the manufacturer."
Rose Mary Bagby, Facility Manager; Vicksburg Water Pollution Control Center, Vicksburg, MS
Hatfield Township Municipal Authority
"Recently because of a regulatory requirements, it became necessary to replace our final effluent chlorination system with ultra violet light disinfection.
As spring arrived, we began to notice that the algae which grows on our secondary clarifier weirs, channels, and baffles which slough off and accumulate on the racks of the UV light tubes. Towards late spring the problem became so bad that we had to pull the lights out of the channels at least once per week to clean off the algae. In addition, we cannot even manually brush the secondary clarifier weirs and channels as we had done in previous years, because the debris would immediately clog the light tubes.
I remembered having seen your equipment demonstrated at the WEF annual conference, and pulled the information I had received about your company. I felt that if you're brush system really worked,... we might have a solution to our problem.
It appears now that your company's a brush system did indeed the solve the problem. The weirs, channels, and baffles in the secondary clarifiers are remarkably free from algae buildup. In fact, we can now see the original callers of the channels and weirs.
The main advantage, though, is that since the brushes have been installed, we have not cleaned algae off the UV light tubes, and we have saved a lot of manpower hours by not having to manually brush what your system now does automatically."
Peter R. Dorney, Executive Director; Hatfield Township Municipal Authority; Colmar, PA.
Knoxville Utility Board
"We have found the Weir-Wolf to be an efficient and cost effective alternative to Manual cleaning. I have calculated and projected an estimated savings of $18,300 per year… (with) an additional $4600 per year has been realized in dry chlorine savings...
The Weir-Wolf has also made our plant a safer place in which to work. Automated cleaning significantly reduced the exposure to harmful chemicals and biological hazards. I no longer have to worry about operators slipping and falling while cleaning tanks. The Weir-Wolf System has freed our plant of a major housekeeping job, which nobody wanted to do, and allows operator time to be better utilized.
The price paid for the Weir-Wolf was money well spent. It has offered a simple, cost effective alternative to Manual cleaning."
Tony Ortega, Plant Supervisor; Fourth Creek Treatment plant; Knoxville, TN
PDR Engineers, Inc.
"... We regularly specify the Weir-Wolf to minimize the danger inherent in the Manual cleaning of clarifier effluent troughs, weirs and baffles. In addition, our analysis indicates a complete the back of the initial investment in less than three years because of labor savings."
Elbert C. Ray, President; PDR Engineers, Inc.
League City, Texas
"I enjoyed our discussions regarding this City's satisfaction with your Weir wolf automated brush cleaning mechanism. As we discussed, this City of League Cities Wastewater Department received a national award from Water Environment Federation for safety. Part of our ability to receive that award is the fact that we no longer have personnel cleaning clarifiers, pulling hoses around, or standing awkwardly on the weirs or walls of the clarifiers (to use hoses) to clean the clarifiers. Since the installation of the Weir-Wolf mechanisms on the six clarifiers at the Dallas Salmon Wastewater Treatment Plant, we have had no injuries. I attribute this in part to the brush cleaning mechanisms installed on the clarifiers. I think any city or a municipality that is safety conscious you should look into obtaining this equipment as it can reduce on-the-job injuries and lost time accidents. While your equipment is not the sole reason for the safety award, I credit in part the Weir-Wolf automated brush cleaning mechanism in allowing us to have three years without a lost time accident."
Dale L. Doerr, Director of Utilities; League City, TX
"We installed a UV disinfection system in 1997, but soon found ourselves having to acid clean the modules every month because their efficiency was being reduced by all the algae were having to clean off of our clarifiers. We installed Algae Sweep (now known as the Weir-Wolf) systems on all of our clarifiers and we haven't had to pull a UV module since. We're saving about $50,000 a year... Algae sweeps (Weir-Wolf) ought to be mandated for all plant expansions and upgrades."
Mark J. Livengood, Utilities Supervisor; Troy, OH WWTP
Ralph Pfister, Executive Director of the Yorkville- Bristol Sanitary District in IL was asked why a Weir-Wolf Algae Sweep was being installed on a new 90' diameter clarifier that was going to be entirely covered by a dome. "There are several reasons, " he replied, " but the main one is safety. We don't want me and crawling around under a covered clarifier to clean algae off sharp, stainless steel weirs. It would be dangerous and very time consuming."
Won't the cover prevent algae growth? "Not entirely," he said. "Covers are more to prevent freezing than algae growth. We still need to stay after algae buildup to prevent short circuiting, and (the Weir-Wolf) Algae Sweeps are the most efficient way to do that. In fact, we're going to install them on our old 65 foot tanks."
"When we replaced are three, 30 foot diameter clarifiers with 80 foot diameter clarifiers, we knew we were looking at major problems with algae buildup. So, we looked at a lot of possible solutions and narrowed them down to two: launder covers and Algae Sweeps (Weir-Wolf). We finally decided to go with the Algae Sweeps (Weir-Wolf), because launder covers were more expensive, they didn't eliminate growth in the tanks open areas, and they would have prevented us from being able to see the activity going over our weirs, which has to be monitored continually for optimum operations."
Michael Davis, Plant Director; Fishers IN WWTP