A Challenging Environment Calls for Skillful Pros In Central Florida, a 12 MGD reclamation facility was experiencing a loss of capacity in their north aeration and anoxic basins. These tanks presented a challenge because they were lined with rows of diffusers that circulate oxygen feeding the microorganisms and bacteria residents that break down the waste. This job required experienced professionals to access and remove the built-up material, so the customer called on U.S. Submergent Technologies (USST) for a solution. USST has cleaned tanks, pipes, and lift stations on over 400 projects around the United States. Our qualified crews know how to evaluate situations on the ground to get the job done safely and efficiently. “I am proud of our guys for navigating the hard-to-reach environment along the bottom of these tanks and capably removing large amounts of material,” said Eric Pace, Foreman at USST. “Our patented equipment and thorough safety measures allowed us to get into these structures and complete the job safely without any incidents.” At USST, safety is our number one priority, and these structures were vast in size and 20-feet off the ground. By executing a site-specific health and safety plan, our crews implemented confined space entry … Read More
Florida Sand and Grit Grant Program Reimburses Restoration Costs A rural community located in Southeast Florida’s Treasure Coast was experiencing capacity issues with their wastewater treatment plant’s multi-tank. Specifically, inside their chlorine contact chamber, which disinfects and treats the wastewater. A considerable amount of debris was clogging up this structure and decreasing efficiency at the plant. This municipal wastewater treatment plant collects and treats more than 500,000 gallons of wastewater per day and met the qualifications for reimbursement through Florida’s Sand and Grit Grant Program, which makes it possible for publicly owned facilities averaging 3MGD or less to address the issues of sand and grit accumulation by reimbursing 50-100% of restoration costs. “U.S. Submergent Technologies (USST) worked with us to help make the process of restoring capacity at our plant as seamless as possible,” said Patrick Nolan, Utilities Manager at the Village of Indiantown. “USST’s knowledgeable crew was professional and completed the job expeditiously while our plant remained online. The funding available through the Florida Sand and Grit Grant program helps rural municipalities like ours continue to serve our community with excellence.” USST came in and removed debris from the 70-foot in diameter, 18-foot-high structure with no need to drain … Read More
A Massive Job Calls for USST’s Expert Knowledge A large primary clarifier serving as an equalization tank at a city’s wastewater treatment facility had accumulated 16-foot-high mounds of sand along the bottom, seriously reducing its capacity and potentially passing grit through the treatment process. U.S. Submergent Technologies’ (USST) expertly trained crew set about to handle cleaning this massive 125-foot in diameter structure. “Our knowledgeable crews have a proven keen ability to navigate obstacles on the ground and this job presented some unique challenges,” said Paul Del Favero, Operations Manager at USST. “This tank was huge, it’s covered, and the walls were about 25 feet high, so accessing the material inside was not going to be easy. By utilizing specialized equipment, we were able to set up our process inside the structure and clean out the sand efficiently and without damaging the structure.” Crew members extended hydraulic lines and ran a 120-foot hose setting up a pump to run on our powerful Combination3® Truck. Using our GritGone Process®, USST removed sand and grit while returning decanted water back to the plant for further treatment. The crew used reclaimed water from the facility to clean the structure. All these measures contributed to … Read More
USST Crew Responds to Changed Conditions Adeptly In rural Northeast Florida, a municipal wastewater treatment plant operating at .4 MGD was reaching critical capacity loss with their surge tank. This large multi-chamber tank, which is essential to the overall health and functionality of daily operations at the plant, required cleaning. U.S. Submergent Technologies (USST) was called in to assess the structure and remove the buildup of sand and grit throughout this wastewater tank. “This project was estimated to have 36 tons of material in the tank, but once we got on-site, we were dealing with at least seven feet of material along the bottom of this structure, much more than originally expected,” said Paul Stephenson, Foreman at USST. “Combining our experience and knowledge from cleaning hundreds of wastewater tanks, our crew was able to handle several challenges presented on the ground with accessing and removing the material in the safest and most efficient manner possible.” USST’s versatile Combination3® Truck has a 49-foot extendable boom, which was necessary to reach over the tank’s 20-foot wall, and by extending a 150-foot hose to our truck’s powerful vacuum, the crew reached and disposed of 23 loads of material. In total, 364 tons of … Read More
Florida Sand and Grit Grant Program Covers Restoration Costs PROBLEM: Two oxidation ditches at two wastewater treatment plants serving the City of Mount Dora were due for cleaning, having accumulated a significant amount of sand, grit, and debris over 15-years. This loss of capacity was increasing energy costs and reducing efficiency at these treatment plants. U.S. Submergent Technologies’ (USST) knowledgeable crew was called-in with our versatile Combination3® Truck, able to handle multiple setups to complete these projects. SOLUTION: A large oxidation ditch measuring approximately 50-feet wide by 330-feet in length was the first structure our crew tackled. While this oxidation ditch was in full operation, USST utilized the Combination3® Truck’s downhole pump and 49-foot extendable boom combined with our GritGone Process® to remove approximately 287-tons of sand and grit material. The tank did not have to be drained down or taken offline for our crew to perform the cleaning. The second oxidation ditch measured approximately 40-feet wide by 130-feet in length, and a drain down was necessary to effectively reach the material. Our experienced crew safely executed confined space entry protocols and procedures to clean this structure. RESULTS: In total, approximately 630-tons of material was removed from these two structures … Read More
Identifying and Managing Annual I&I Issues Where does the sand in wastewater treatment plants come from? The answer is the collection system. Determining whether or not there is an I&I (inflow and infiltration) issue can be the real challenge. Spring is just around the corner, and with it, the time of year when most of the country’s rainfall usually occurs. Throughout the wet season, an increase in flow into a WWTP can be due to inflow and not an increase in domestic wastewater collected. Increase in flow is also a potentially a reliable indicator that treatment capacity has been compromised and may need to be restored. Over time, sand seeps into pipes and lift stations and is eventually transported to WWTP infrastructure. Sand, unlike other debris such as rag material, FOGs, and grit, is an unintended consequence of increased inflow into collection systems. During heavy rainfall, wastewater collection pipes receive an inflow of rainwater which seeps into the pipes transporting sand. Seepage bringing sand usually occurs without notice until the associated problems have become acute and require immediate attention. I&I issues tend to be out of sight, out of mind. The consequences of I&I tend to go undetected due to the fact … Read More
USST: Safer, Quicker, Cheaper, Stronger This week, U.S. Submergent Technologies is performing sand and grit removal from a wastewater treatment plant in Orlando, FL, which requires confined space entry. The USST crew is removing material from two clarifiers at the plant. Both are 120 feet in diameter and 16 feet deep. Approximately 120 tons of sand and grit has been removed from Clarifier 1. “We performed a confined space entry, which includes constant air quality monitoring,” said Paul Del Favero. “Fall protection is being used as well while on the catwalk inside the tank.” The crew began work on Clarifier 2 this week, running the Model 949 and Model 934 simultaneously during the project. “We have been using our proprietary equipment for the cleaning of this tank,” Del Favero said. “It’s been a real team effort. USST expects to complete the cleaning of clarifier 2 this week.