DAF Pumps | Air-Whip Pump Out of the Ordinary

DAF Pumps

Dissolved air flotation, the process of injecting microscopic bubbles into an influent to create a flocculant, which is skimmed away. Sounds simple, doesn’t it? It is a simple enough concept. You create small enough parts so that things can be handled on a electro-chemical level. Charges attract suspended particles whose charges are keeping them apart. Microscopic air bubbles, correctly produced, along with the right chemical agents collect all the garbage in wastewater and float it to the top- each particle surrounded by microscopic bubbles that carry each particle away. Mind you, this isn’t the large bubbles produced by some equipment that produces something like chocolate mousse. This is ultra fine microscopic bubbles that do more than just produce a coagulant. Your end result is flocculant, a more solid and “load bearing” composition of very small bubbles. Your end product is much higher in waste content, leaving nearly pure clear water.

The savings can be enormous.

Treated water is much cheaper to send to a municipality than buying pollution credits.

Are you using Hellbender DAF pumps or Edur DAF pumps or another brand that costs thousands of dollars, but wears out in short order under industrial loads? Who wants to spend $25,000 every six months on replacement DAF pumps?

Enter the Air-whip DAF pump. It’s simple- our pumps last years. Some of our first pumps, installed several years ago are still operating at full capacity today,

Our technology produces the needed micron size bubbles with a specially engineered design that uses a modified standard style pump with much higher durability. One of our pumps actually had a work shirt introduced in the influent and is still running strong after the “experience”.

Inquire now about the Air-Whip DAF pump 888-216-1231. or email dave@dissolvedair.com

DAF Problem? Easy Solution

A DAF problem that drives an operator to start seeking a solution can usually be sourced to one of two causes: chemical or mechanical.

Chemical if a problem arises with proper flocculation or coagulation then an adjustment in chemical dosing is determined which resolves the core problem. In some dynamic environments, chemical dosing requires constant monitoring and adjustment.

Mechanical There are relatively few mechanical components in a typical DAF. The introduction of air in proper quantities creates many of the challenges found in dissolved air flotation applications including:

• Short pump life
• High Cost
• Complexity
• Intolerance of Entrained Solids
• Difficult or Impossible Maintenance

Air-Whip DAF Pump Impeller

The science and innovation behind the Air-Whip pump addresses all of these issues and does so with lower initial cost. The price of the Air-Whip DAF pump is fractional compared to typical DAF pumps on the open market.

The Air-Whip pump is engineered to tolerate both air and entrained solids. One of the pumps actually “ingested” a shirt that was accidentally introduced into the influent and continues to operate today. The Air-Whip pump has a very long life expectancy measured in years rather than weeks and months- typical lifespans of traditional pumps. The reliability and performance of the Air-Whip DAF pump provides both flexibility in operation modes and greatly reduced maintenance costs.

Some of our pumps have been in operation since they were first installed five years ago.

Call for new or replacement Air-Whip DAF pumps for your application and water treatment success.

Call Dave Keys at 714-924-4422. The Air-Whip DAF pump price is a low cost alternative to what you have been finding on the market.

An elegant design delivered inexpensively, the KeysTec Air-Whip DAF pump.

The KeysTec Air-Whip DAF Pump

Dissolved Air Flotation | DAF Pumps

Not By Flocculant Alone – How Dissolved Air Solves A Paper Recycling Problem

Inquire about the Keystec pump: Call Dave Keys at 714-924-4422.

My Brother Dan and I went to visit a paper company a couple of weeks ago, here in the Los Angeles area. In East LA and Commerce there are miles and miles of industries that run various processes and you can imagine that recycling wastewater is of premium concern both for the savings of water, and the cost of disposing of waste materials.

Problem Solved with DAF Airwhip Technology

Enter the paper company. They had done some online research and called on Keystec to solve the problem that had arisen from trying to solve another problem.

The paper company produces recycled, post-consumer content cardboard, the sort that is used to package up your typical products from dry pasta to cardboard bases for shrink-wrapped goods. In an effort to recover more of the ink, clay, ash and debris from the water used in the paper making process, they had made adjustments to a chemical flocculant in the water. This seemed to work great- lots of material was floating to the surface in the processing tanks, but before very long at all, the operators realized that the flocculant was the consistency of chocolate mousse and there was lots of it. So much that it spilled over the collection tanks and processing byproduct ran onto the basement and everywhere.

It left lots of clay in the tanks too. A big mess.

We arrived on a Tuesday morning and met with the folks there and had a look at the so called DAF they were operating. It was using an old style cavitation pump, sucking air into the pump and spinning it out via centrifugal force, producing some fairly large sized bubbles. In essence, instead of creating a flocculant, they were creating big bubbles with coagulant clinging to it.

Oops! We’ve got it a little backwards here. True dissolved air flotation creates microscopic bubbles and they collect around relatively large flocculant particles and float them to the surface where the flocculant has the consistency of oatmeal, not chocolate mousse! They needed the proper three stage process of coagulation, flocculation and dissolved air flotation. Their pump wasn’t going to do the job with the single flocculation turned coagulation stage they were using, neither would it do much with a better flocculation with a two stage process because the bubbles were like beach balls compared to what’s needed for dissolved air flotation.

We recommended the Keystec Airwhip pump for its perfect application to this problem and its longevity compared to standard DAF pumps.

Soon this company will be returning much of this paper by-product back to the new product and returning clear water to their system.

Result? Savings from reduced downtime, savings from reduced sewage fees and savings from reduced disposal of paper byproducts that should be re-integrated with new product.

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New and used recycling equipment

Orange County SEO

Non-Clogging DAF Aeration Pumps – Low Cost – Efficient – Long Lasting

The KT-M Series Air-Whip Pump is the industry’s solution for:

• Short pump life
• High Cost
• Complexity
• Intolerance of Entrained Solids
• Difficult or Impossible Maintenance

The

KT-M Series Air-Whip Pump

provides:

• Lower Initial Cost
• Lower Maintenance Cost
• Simplicity
• Easily Passes Entrained Solids
• Flexibility in Operation Modes
• Very Long Life Expectancy

Get the longest lasting and most efficient, low operational cost

DAF Pumps

Ready For Hurricane Season? Call Dan Keys

Ready for hurricane season? Of course, we’re not but it’s coming with its wind and waves. What will this do to the oil floating on top of the gulf? It will emulsify much of it, mixing it and dispersing it into such small particles that its electrochemical forces of like charges will suspend each particle in a force field of its own charge, repelling nearby particles with like charges away. The oil, though not chemically bonded to the water stays mixed, creating a sludge of tiny particles that can only be dealt with on a microscopic level. Some of this microscopic environment includes microbes that will readily eat the oil but then there are the little problems of waste and depleted oxygen. Now you have suspended oils, suspended proteins and depleted oxygen. A perfect environment for… nothing. No fish, no wildlife, just a growing dead zone in the gulf. If the problem spreads to wetlands, then you’ll have dead zones forming there as well.

Dissolved air flotation can be applied to these areas and the oil and microbe waste can be collected around the air bubbles and skimmed off. Now what’s needed are long lasting, high rate, high volume capable pumps that can handle the millions of gallons long term.

Enter the Air whip pump by Keystec.DAF pumps that defy common design and outlast most DAF pumps on an exponential scale.

More information at the Keystec website for: DAF pumps.

Dissolved Air Flotation for Solids? How to cope with the problem of white-water systems and pump blockage.

A true DAF generates dissolved air.  The process involves dissolving atmospheric air to the greatest saturation possible under pressure and then releasing the dissolved air in the form of microscopic bubbles with the shock developed in a back-pressure valve or valves.

Modern DAFs operate the white-water system at about 95 to 120 PSI when operated in a recycle mode to achieve the greatest practical degree of air saturation.  There are numerous ways to create the necessary interface between air and water to do this, but the most popular lately is to inject metered air into the inlet of a multi-stage pump.  A saturation tank follows the pump.  Older designs saturated the full inlet flow at about 35 PSI with a larger saturation tank and a back-pressure valve.

All “white-water” systems can be trouble due to the solids that are entrained in waste water.  They can also be very expensive with tight clearances, unable to tolerate solids passing through the pump.

Dan Keys of Keystec developed a new, solids tolerant white-water DAF pump which can work with unscreened waste streams and is low cost and very easy to repair if it’s needed.  As a DAF design engineer, it had long been one of Dan’s goals to solve this old problem.  The development is now complete and the pump is enjoying great success in every place where it has been applied.  Its ability to handle solids has made it possible to return to full flow inlet aeration and split flow inlet aeration, thus increasing the DAF throughput capacity by freeing the throughput capacity used by recycle flow.

To summarize, proper white-water is achieved by aggressive air saturation which involves maximum air to water interface under pressure and some residence time in the pressurized state to complete the saturation, followed by a high-shock back-pressure valve or valves to force the sudden release of the saturated air.

This represents a revolutionary advance in applications of Dissolved Air Flotation technology.

There are also “entrained air” systems on flotation devices.  Be aware that while this approach can work many cases, the bubbles produces by spinning discs and blowing air through porous filters have different surface charges and are often too large for good flotation.  The ideal environment is produced by 30 to 50 micron bubbles combined with good chemistry that attracts the bubbles to the flocs formed by the chemistry. If the bubbles are able to coalesce while entraped in the floc, the rise rate can increase and allow more aggressive separation.  So, chemical choices are also key to good performance.

Partners in Dissolved Air Flotation Applications

Cost Saving Conversion to Air-Whip Pumps ® Dissolved Air Flotation

Cost Saving Conversion to Air-Whip Pumps ® Dissolved Air Flotation

All DAF (Dissolved Air Flotation) installations have basic requirements. In order to achieve maximum dissolved air in the water, the following must be available:

• Significant air to water surface area interface (achieved within the pump)

• Pressure, provided by the pump (preferably 75 to 115 psi., depending on installation and design)

• Time. Dissolving air is not instantaneous. It requires time under pressure and interface. This is the purpose of the saturation tank/pressure header.

For very large DAF installations having very high flows, the Air-Whip pump is capable of delivering flows to match the “white water” requirement up to about 400 GPM. It must be understood that as the flow increases, the residence time in the pump decreases, placing more dependence on the saturation vessel part of the system. In some cases, the client has simply injected directly into the influent line of the DAF with no problem generating “white water”. This can work if the flow through the Air-Whip pump is relatively low. For higher flows, a tank or larger diameter section of pipe of sufficient length must be provided to introduce sufficient residence time under pressure for the sheared air to be dissolved into the water. In many of the modern DAFs, this saturation tank is the pressure header from which “white water” is delivered to multiple points. All properly designed DAFs have some type of saturation vessel for this purpose. Some are capped large diameter pipe sections and some are tanks, but they serve the same specific purpose. An installation without this device can never perform to full capability.

Contact KeysTec, LLC to review the details of your installation to determine suitability for conversion to the Air-Whip. In many cases, the “Full Flow” or “Split Flow” configuration can give you a significant increase in the capacity of your DAF.

Dissolved Air Flotation

Note: DAFs are sometimes used in conjunction with sand filters. This is yet an emerging concept that has known issues. Typically, sand filters are used for certain metallic compounds:

Vietnam and Bangladesh are both confronted with high arsenic concentrations, but distinct water compositions require different solutions. Arsenic mitigation depends for the most part on natural factors, such as the availability of alternative water sources and the feasibility of water treatment.  If several options are available, socioeconomic factors determine which mitigation option is implemented most successfully.

The socially accepted and already widespread sand filters in the Red River delta have advantages for their simplicity and low cost of operation. The removal of iron from the pumped water is immediately apparent even to people who are not aware of the arsenic problem. Thus, sand filters are a good option in Vietnam and in other affected regions with high concentrations of dissolved iron.

source: washtec.wordpress.com

Use of sand filters must be carefully evaluated and specifications must be strictly followed.

Our Philosophy is Simple | Dissolved Air Flotation

Our Philosophy is Simple | Dissolved Air Flotation Performance

• Focus on problem areas where solutions are too costly or perform poorly.
• Keep the designed solutions as simple as possible increasing product reliability
• Provide solutions that use readily available, low cost components wherever possible for ease of maintenance and low initial cost.

Our products bear the stamp of this philosophy – the KeysTec Air-Whip pump has demonstrated this philosophy with in service times measured in years instead of months. We provide strategic cost saving technologies in Dissolved Air Flotation.