Beauchamp Water Treatment Blogspot: January 2015

Friday, January 30, 2015

Water Softeners: How they work

Water softeners or water conditioners (as they are frequently referred to) use a process called Ion Exchange to remove hardness minerals dissolved in water. Some of the minerals that can be a problem in hard water are calcium, magnesium, iron, and manganese. Water softeners exchange the mineral content present in the water source for sodium ions, making the water soft in the process.

Water softeners have four integral components:
1. Control Valve - Controls the water as it flows through the valve, resin bed, the distributor tube/ manifold, and brine tank.
2. Resin Tank - Holds water softening resin and gravel under-bedding.
3. Resin - Small beads that hold the sodium “charge”.

4. Brine Tank - Holds salt or potassium, and water used to regenerate the water softening resin.

Single tank water softeners operate at a preset time of day usually at 2 am. This style softener can potentially and frequently do run out of softened water when the capacity is exceeded.

Twin Tank water softeners operate on demand. When the capacity for one tank is nearly exhausted it switches tanks and the previous tank regenerates immediately so there is no interruption of soft water. These systems use softened water to regenerate so they are very efficient with salt and water usage.

The Water Softening Process:

As hard water enters the water softener valve it is diverted to the water softener tank. Water flows down through the "resin bed" and comes in contact with the water softening resin. The resin

beads are "charged" with sodium ions. As the hard water passes down through the resin bed calcium, magnesium and other ions (hardness) are attracted to the resin and sodium ions are exchanged. Removing the hard water minerals and delivering "softened water" to the home.

Water softening resin has a certain amount of “capacity” and has to be recharged/regenerated with sodium chloride or potassium chloride before it is completely depleted of “soft water”. A typical residential water softener may be anywhere from 24,000 grains to 60,000 grains of capacity, generally depending on the tank size. In basic terms, the resin beads are much like a large sponge and can only attract or hold a certain amount of hard water. The sodium is what’s used to squeeze the sponge so it can absorb again. When a sponge becomes too saturated it gives off the water. Water softening resin has to avoid leaking off the hard water so it regenerates before it becomes totally saturated with hard water minerals. On a single tank water softener, one full day of soft water is typically left in reserve for days with higher than normal water usage or times when the normal capacity may be reached first thing in the morning and the system is set to regenerate (delayed regeneration) that evening at 2 am. This is referred to as the reserve capacity. With a Twin Tank water softener, there is no need for reserve capacity. Nearly the full capacity of the resin is used in each tank for softening. The system switches tanks (to keep supplying softened water) the other tank regenerates and goes into standby mode. Twin tank systems also use softened water to regenerate so they are very efficient.

Water Softening Cation Exchange Resin:
The first water softening resins were natural mined zeolites. Today most water softening resin is made of polystyrene and is manufactured for many different applications and efficiency.

Zeolite

Polystyrene Resin

The Regeneration Process:

When the predetermined “capacity” is reached the water softener will regenerate. Some systems may differ in their sequence of cycles. This is the most prevalent regeneration sequence used.

Regeneration Cycles:

1. Backwashing – Reverses the flow of water down through the distributor/manifold to clean the gravel under-bedding at the bottom of the resin tank. This lifts and loosens the resin bed and washes out oxidized particulates.

2. Brine Draw – A concentrated brine solution is drawn from the brine (salt) tank and washed through the resin bed displacing the hardness minerals from the resin beads, flushing them to the drain and recharging the resin beads with sodium or potassium. (This cycle may be either down-flow or up-flow through the resin tank depending on the model)

3. Slow Rinse – A slow rinse to rinse off excess sodium that may be present in the resin bed.

4. Fast Rinse – Down-flow of water to compact resin bed and prepare for service.

5. Brine Refill – Refills the brine (salt) tank with the proper amount of water to dissolve sodium or potassium and prepare brine solution for the next regeneration cycle. (This may be the initial cycle or last cycle in some systems).

6. Service – Normal operating position for daily water usage.

There are five types of water softeners:

1. Manual - Manually regenerated by the homeowner. (Not generally in use today)

2. Portable Exchange - Regenerated off-site by the dealer and exchanged in the home.

3. Time Clock - Regenerates according to days a week (6-14 day timer).

4. Demand/Metered - Regenerates according to gallons used.

5. Twin-Tank Demand - Two tank system. One softener tank is in service and one in standby mode. Tanks switch during the regeneration cycle to supply conditioned water 24hrs per day, no matter the water usage.

How to Choose and Size a Water Treatment System

There are several factors important in choosing the proper water treatment system for your home.

1. Water analysis – Determines the total hardness (calcium, magnesium), Iron (how much, what type), PH, TDS, H2S, and more.

2. Water Usage – Average daily water usage for your household. Most families average 75 gallons per day per person. 4 people x 75 = 300 gallons per day usage.

3. Fixture count and GPM – In many modern homes, the gallons per minute needed (peak flow rate) to operate a home are critical and need to be part of the equation in sizing a water treatment system.

4. Value – Warranty, efficiency, longevity, operating cost and price.

5. Support and Service - The company backing the system.

Have your water tested by a reputable dealer or third party water testing lab, talk to your friends, neighbors, colleagues, check the Better Business Bureau and to search for a certified water treatment expert in your area, go to www.wqa.org. A proper water analysis is the most important aspect of water treatment. If you have a sales rep come to your home for a water analysis have them test the water directly from the well and through a Demo-Softener (they should all have a demo softener) to help determine the type of iron present or any other problems with the water.

Here is a general water analysis and how a water softener is sized for this application.

People 4 = 300 gallons per day

Hardness = 20 grains per gallon

Iron = 1 part per million ferrous iron (4 gpg of hardness for every 1 ppm of ferrous iron)

PH = 7.4 (6.5 - 8.0 PH is optimal for water treatment)

TDS = 410 parts per million

H2S = ND

TCH 24 grains per gallon (total compensated hardness)

x 300 gallons used per day

= 7200 grains of total compensated hardness per day.

This application would call for a 45,000-grain water softener which would regenerate every 5 days (using 90# of salt per month (7200 grains of soft water are needed for reserve capacity). A more efficient option would be a 45,000-grain twin tank softener which would regenerate every 6.25 days and would use 72# of salt per month (No reserve capacity required). The twin tank system would use over 1000# less salt in one year which would save nearly $184.00 per year and also saves 1440 gallons of water in that same year. Every company talks about water softener efficiency as it relates to salt usage but VERY few address the overall efficiency which includes salt and water used for the regeneration process. That is the test of a truly efficient water treatment system.

Summation: A water softener/conditioner alone may not always be the solution to every water treatment problem. There are water problems such as high iron content, hydrogen sulfide, low PH, different types of iron and a myriad of other water-related issues that may call for additional water treatment equipment to properly treat the water and provide your home and family quality water. With the proper water treatment system, annual water testing and preventive maintenance you can expect twenty plus years of soft, conditioned water which makes your home run more efficiently and improves your quality of life.

Here are some helpful links related to this article:

www.beauchampwater.com

www.resintech.com

www.wqa.org

Water softening - Wikipedia

www.nsf.org

Good Water, Good Life!

Ray McConnell

Beauchamp Water Treatment and Supply

872 N Old US 23 Brighton, MI 48114

810-632-2000
www.beauchampwater.com
www.facebook.com/beauchampwater

Saturday, January 3, 2015

Water Softeners 101. What you need to know.

Choosing the Proper Water Treatment System.

When looking for a water treatment system it pays to do your research. There are many different makes, models, features and claims to performance, warranty and reliability by manufacturers, distributors and dealers (franchise and independent). All of this information can be difficult to sort through, very confusing and at times very misleading for the consumer. We will attempt to help clarify some of this information and give unbiased advice to help you in your decision-making process.

The first thing to be aware of is a water softener is not the cure-all to every water treatment application or problem. Water softening has become a generic term that really encompasses all water treatment systems. Including water softeners, filtration systems for iron, manganese, hydrogen sulfide, carbon filters and other water treatment equipment for a myriad of water-related problems such as hardness, iron, hydrogen sulfide, manganese, and PH. These are just basic water treatment application concerns. There are many different types of iron, some bound by organics in the water, others bound by particulates that can make it difficult to remove iron. Low PH water (acidic) can wreak havoc on every water treatment application. Some “smells” in water can confound the most seasoned water treatment experts still. To add to this any water analysis is in reality only a “Snap Shot” in time as water chemistry can change seasonally. The Hydrological Cycle affects the water table across the globe. Consequently, water tables change seasonally, drought conditions, heavy rain, spring thaw/runoff, (which regenerate water tables) can dramatically change the water chemistry in groundwater and surface water. The past three years have been a perfect example of this as the water tables in southeast Michigan have changed significantly because of our very rainy springs and summers and the heavy winter snows of 2014. With this dramatic water cycle, much of the water chemistry from private and community wells in Livingston, Oakland, Washtenaw and Genessee counties changed for the worse. One of the biggest complaints we hear at Beauchamp Water Treatment and Supply when we are helping people solve their water problems is their water now smells and they have a lot more iron staining in their home. Arsenic levels have also risen dramatically and this has become a serious issue for residents particularly in Livingston, Washtenaw and Oakland Counties.

Proper Water Analysis:

The most important aspect of choosing and sizing the correct water treatment system for your application is a proper water analysis to determine water chemistry to see if any “problem water” issues may be associated with the water and the proper application of equipment needed. A complete water analysis should always be the first step in choosing a water treatment system. There is a myriad of water chemistry problems that factor into the proper water treatment system application. As stated earlier, hardness, iron, manganese, hydrogen sulfide, and PH are just some of the basic water problems involved in sizing and types of equipment needed. Even after all this, it is recommended to have your water tested every 2-3 years to check for bacteria in private wells, see if the water chemistry or household water usage have changed and if adjustments in the water treatment system may be necessary.

If you choose to take this project on yourself or have a water treatment professional help you a comprehensive water analysis is the most important step and can be done by the water treatment dealer or an independent water lab. Independent water testing labs such as brightonanalytical.net are generally available in every area. If problem water issues arise this is where the water treatment professional will take water samples for further testing to determine the correct water treatment approach. They can be an invaluable resource for a comprehensive (third party) water analysis and can test for many things water treatment companies may not be equipped to test for such as arsenic, lead, organics, bacteria, and chlorides to name a few. If your community is on city water or a community well an annual water report is available on-line at their website. Some local Consumer Confidence Water Reports are available on this blog's home page.