Increasingly, wipes are causing serious issues for wastewater treatment system operators. Many of the wipes entering sewage systems are not dispersible and technically not flushable. The term “flushable wipes” was spawned in the 1980s when a consumer products company brought a latex-bonded air-laid wet wipe with polyester fibers to the market. The wipe was considered “flushable” since it could transit through the toilet, but with all those polyester fibers, it was not dispersible.
Grease can cause big problems, but when managed properly it can provide big dividends as a renewable energy source. The wastewater treatment plant in West Lafayette, Ind., has grease in abundance and is making the most of it.
In 2012, the plant received an average of 18,000 gal of grease per month. Although grease deliveries are not always daily, the plant can get multiple deliveries in one day. One small tanker truck can bring in 2,000 to 3,000 gal while a large truck can bring in between 4,000 to 5,000 gal.
An Abundance of Grease
The city of Revelstoke, located along the Columbia River in British Columbia, boasts a growing ski resort and one of the world's best heli-skiing destinations. The scenery of the neighboring Selkirk and Monashee mountains belies Revelstoke's growing population. In 2007, Revelstoke had more than 7,000 residents, and hosted thousands of winter sport enthusiasts at Revelstoke Mountain Resort.
A Growing Problem
In recent years, maintenance operators at the Segerstrom Lift Station in Santa Ana, Calif., noticed an escalation in pump ragging and blockages. This led to an increase in maintenance expenses due to half- to full-day cleanings and an increase in man-hours. Engineers sought the help of Costa Mesa-based JWC Environmental (JWCE), which recommended a Channel Monster sewage grinder.
For many years, a water reclamation plant in Texas successfully used six Penn Valley double disc pumps for their primary sludge and scum applications. At their latest expansion project, they added macerators in-line ahead of all the double disc pumps to enhance their process and grind rags and debris. Since the installation of the macerators, they have suffered severe problems with plugging of the pump suction lines that led to frequent pump rebuilds. After years of frustration in dealing with this problem, they turned to the Sludge Monster.
When Otter Creek Water Reclamation District was faced with expensive recurring cleanup costs at its largest wastewater pump station, engineers solved the problem with the Muffin Monster.
Disposal of fats, oils and grease (FOG) was an ongoing problem for municipalities and utility companies for years. When these thick, gooey substances are allowed to discharge through drains, they congeal inside sewer pipes and cause an overflow. Sewage overflows are health hazards, damaging property and the environment.
Underground location keeps pump station buried under a new park
Septage receiving system aids unique and efficient plant design
Creative grinder installations help water pollution control facility run smoothly
Grinders protect pumps and keep the plant clean
Finescreen panels improve capture rate, reduce labor costs
Grinder protects pump from rags, plastics and trash
Separation system manages screening, odor and trash problems
Fine screen results in immediate maintenance benefits
Screenings washer removes fecal matter, reduces costs
Fine screen retrofit cuts upgrade costs by $1 million for Hawaii MBR
Washer-compactor cleans up sloppy, smelly screenings.
Screening system captures more solids at New Jersey wastewater treatment plant