MARINGOLD
GENERAL TRADING
KSB- The New Wastewater
Solve The Problem. Don’t Just Transfer It.
More than ever before, flushable wipes and other debris are clogging pumps and systems in wastewater treatment applications. KSB has the solutions that will conquer the clog and keep the water flowing.
Today’s wastewater requires new thinking
KSB understands the dynamic challenges facing the industry, and KSB knows how to pump this new wastewater.
KSB: Unique product portfolio designed for today’s challenges
KSB’s German-engineered pumps have been specifically designed to solve the industry’s ever-changing challenges.
Today’s next-generation KSB impellers have been proven to meet the challenging wastewater needs of the North American market.
There are two cultural-behavioral drivers changing wastewater and challenging pump processes.
1. Reduced water use per capita
2. Increased flushables.
The result: increased clogs, ragging and debris
Wastewater Trends
21st Century Wastewater (Less Fluid, More Solids, More Disposables)
A Brief History
Wastewater Treatment In The USA Despite
Despite water’s natural ability to cleanse itself over time, the ever-growing U.S. population has become so
concentrated that high-quality treatment is imperative. In the 19th century, outbreaks of life-threatening
diseases were traced to bacteria in polluted water. Since that time, the practice of wastewater collection and
treatment has been developed and perfected, using some of the most technically sound biological, physical,
chemical, and mechanical techniques available.
Defining Wastewater
Wastewater Treatment
Wastewater treatment refers to the physical, chemical, and biological processes used to remove pollutants from wastewater before discharging it into a body of water.
Since the Clean Water Act issued in 1972, there are now more than 16,000 publicly owned wastewater treatment plants (POWTs) in operation in the United States. Approximately 255,000 million gallons per day (mgd)
of industrial wastewater—treated by chemical, physical, and biological processes—are discharged daily into U.S. waterways. Industries commonly reuse wastewater and process water as its availability becomes scarce.
Source: Water Environment Federation (www.wef.org).
The Clean Water Act (CWA) is the primary federal law in the U.S. governing water pollution. Its objective is to restore and maintain the chemical, physical, and biological integrity of the nation’s waters by preventing pollution, providing assistance to publicly owned wastewater treatment plants (POWTs) for the improvement of wastewater treatment, and maintaining the integrity of wetlands. It is one of the country’s first and most influential modern environmental laws. As with several other major U.S. federal environmental statutes, it is administered by the U.S. Environmental Protection Agency (EPA) in coordination with state governments.
The Wastewater Treatment Process
Wastewater 101
What happens in a wastewater treatment plant is essentially the same as what occurs naturally in a lake or
stream. The function of a wastewater treatment plant is to speed the process by which water cleanses (purifies) itself.
A treatment plant uses a series of treatment stages (primary and secondary) to clean the water so that it may be safely released into a lake, river, or stream.
Primary treatment removes about 60% of suspended solids from wastewater. This treatment also involves
aerating (stirring up) the wastewater to replace lost oxygen. Secondary treatment removes more than 90%
of suspended solids.
Solids Separation
To prevent clogging, it is critical that solids contained in raw sewage and stormwater be removed early in the process. Modern plants typically begin this process at the Headworks, where raw sewage collection takesplace. Pumps at collection stations are subject to some of the toughest duty. This is where many clogs can occur if equipment is not matched to the conditions.
Some plants use grinder mechanisms upstream of the pump to help reduce the size of debris. Still, stringy, fibrous materials easily pass grinders
Significant Industry Concerns And Issues
“What keeps you up at night?”
U.S. Municipal Wastewater: Where Are We Headed?
Growth, Trends, Opportunities, and Forecasts
Ragging & Clogging
A Systemic Problem
Worldwide wastewater pumping stations that worked well in years past are now struggling because of new
sewage handling challenges. The composition of today’s sewage is different due to an important trend: the
prevalence of supposedly “flushable” wipes. Plastic bags, hygienic articles and, in extreme cases, even car tiresare found in sewer systems that were not designed to handle the extended load these items place on the system. At the same time, the global pump industry is moving steadily toward a sustainable environment requiring low menergy consumption and high efficiency for machines and processes.
1) PRELIMINARY TREATMENT (HEADWORKS)
Mechanical screening removes large debris and rags from raw
wastewater. Grit removal separates sand and gravel.
2) PUMPING
Wastewater collection systems rely on the force of gravity and
lift stations to move sewage through the plant. Wastewater
often has to be pumped to a plant’s highest process elevation
(main lift station).
3) AERATING
Decaying organic matter uses up oxygen. Aeration replenishes it.
Return Activated Sludge is pumped to front of the aerators to aid
the biological process.
4) REMOVING SLUDGE
Sedimentation tanks allow the heavy sludge to settle to the bottom
and be pumped out. Dewatering allows thickening of the sludge
prior to processing in large digester tanks.
5) REMOVING SCUM
Lighter materials such as grease, plastics, and soap form “scum;”
slow-moving rakes skim it off the surface. Scum is thickened and
pumped to the digesters along with the sludge.
6) DISINFECTION: KILLING BACTERIA
At the end of treatment, chlorine is added to kill bacteria. Most
chlorine is eliminated as bacteria are destroyed. The treated
water (called effluent) is then discharged to a local river, lake
or the ocean.
R) TREATING RESIDUALS
Solid-waste materials are kept for 20 to 30 days in large tanks
called digesters where bacteria break down, reducing its volume
and odors. The finished product, free of organisms that can
cause disease, is sent to landfills or used as fertilizer.
Ragging & Clogging
A Systemic Problem
Some pump technologies have designed impellers to cut up the waste and move the smaller pieces downstream, simply transferring the problem. KSB handles the wastewater load
without the energy-sucking chopping process.
The quality of the world’s sewage systems has been influenced
in the past few years by four main factors:
4 Keys To Successful Wastewater
Treatment Processing
4 Keys To Successful Wastewater,
Treatment Processing
The heartbeat of the hydraulic system is the pump and, more importantly, the impeller. The design
and efficient operation of these critical components are essential for successful fluid flow throughout the plant. Once again, this is a systemic approach and all components must work together.
Impeller Matrix
KSB Has The Right Design For Your Application
Hydraulics: One Size Does Not Fit All Identification of sewage conditions is vital for selecting the correct impeller and hydraulics. The increased use of wipes compounds the challenge for pump selection, system engineering, and operation.
KSB Amarex KRT vs. Competing Technologies
How To Challenge the Spec
Some manufacturers use steel or chrome for their impellers and other components. However, cast iron is less expensive and more durable. It you are not cutting the solids, you do not need the sharper edge that steel or chrome provides. Pumps that work properly do not need these expensive materials to perform their primary task—moving fluid. KSB moves the
solids without the extra step of cutting, chopping, or grinding.
Myth vs. Reality
Ready For Anything. Anywhere
Amarex KRT – With Next Generation Impellers
Cross Section
