All residual chlorine is neutralized with sulfur dioxide before the final treated water leaves the plant.  A flash mixer at the end of the chlorine contact tank ensures that the sulfur dioxide comes in contact with the chlorine before it is

discharged.

 

The Chlorine Contact Chamber provides the detention time necessary to ensure a chlorine solution has time to  react with the plant effluent before it is discharged into the East Gallatin River. This chemical reaction disinfects the plant effluent.  As the flow enters this tank it follows a serpentine channel configuration to provide more than 80 minutes reaction time.  

 

This is the plant effluent as it flows over the weir at the end of the Chlorine Contact Chamber.  Compare this quality of water with that flowing out of the Grit

Collector at the head of the Plant.

 

Flash Mixing/Coagulation

Once the water comes into the treatment plant, chemicals are added and the water is mixed rapidly in a container called a flash mixer.

These chemicals include: chlorine  and ammonia for disinfection, powdered activated carbon (PAC) for taste and odor control, hydrated lime for pH (acidity) adjustment and aluminum sulfate (alum) and a polymer for coagulation.

The alum reacts with the dirt in the water to form a "floc" (coagulated sediment). These floc particles trap the dirt present in the raw water.

Flocculation

After the water passes through the flash mixer, it then flows into the flocculation chamber.  In here,  the water is mixed at a very slow speed by large paddles. 

This allows  the delicate floc particles to grow in size like a snowflake on its way to earth.  As the floc grows, it traps additional dirt and suspended material.

gambar di atas container called a flash mixer

Filtronics examines each application and designs a system to meet precise requirements. Our treatment system utilizes three basic components to offer a flexible, economical design highly adaptable to every requirement of space, treatment or system.

1. Flash Mixer

Effective flash mixing requires equipment engineered to provide maximum efficiency and operational quality. Filtronics' flash mixer offers three distinct advantages:

High Energy Input - insures complete, reliable mixing. Counter Current Mixing - maintains consistent mixing quality throughout

the flash mixing process. 15-20 Second Retention Time - assures thorough dispersion of chemicals.

Filtronics' flash mixer provides optimum flash mix performance, thorough chemical destabilization, and proper mixing for virtually all combinations of water and chemical additives.

2. Flocculator

To induce the best possible flocculating action, Filtronics' stainless steel flocculator turbines tumble water and chemical mixtures in a slow random pattern with a top-to-bottom vessel flow-through.

Low Energy Input and Low Tip Speed Velocity - 50 ft./sec. assures gentle stirring of fluid to promote proper flocculation.

15-20 Minute Retention Time - encourages formation of a large and durable floc.

Baffled Interior - facilitates the gentle, random motion of the vessel.

The unique, efficient design of Filtronics' flocculator makes the unit an effective water treatment component in nearly every treatment application.

3. Clarifier

Filtronics' clarifier provides a combination of design features and performance benefits no other clarifier can offer.

Super Slant® Design - provides more actual contact area for better storage and removal.

Solids Contact Clarification - draws untreated water up through the sludge compartment for vastly improved clarification.

Convenient Solids Withdrawal - allows easy removal of sludge without stopping the system or wasting water.

When you specify Filtronics, you specify the most efficient, effective clarifier ever designed.

Advantages of Filtronics Modular Design Industrial system:

Custom unique design for each application. Varied size of individual components without compromising quality. Can be configured several ways to fit into space - around corners, long

narrow arrangements or consolidated into a square. Can be purchased as an entire system or any of the three basic

components individually. Engineered to be adaptable to every water and waste water system. Greater price performance per square foot.

Whether you use the entire Filtronics Industrial Water Treatment System or one or more of the systems three components, you are assured of up-to-

spec quality and dependability in each and every piece of Filtronics equipment.

 

At the plant, the water goes through 12 foot deep flash mixers where alum and polymer are added to it.