ouisiana ural ater ssociation

    Louisiana Rural Water Association provides training and technical assistance
      to  water and wastewater systems throughout the state of Louisiana.

     
Sense Symptom
or Clue
Cause Contaminant Federal
Standard
Health
Effects
Treatment
Options
Turbidity
(cloudiness)
-organic or suspended matter; defective well screen or inadequate public treatment dirt, sand, clay, silt, organic matter (Turbidity) 0.5 to 1 NTU (95% of samples) max of 5 NTU in some situations (2º  MCL)

----

-ultra filtration
-R-osmosis
-distillation
Blue-green stains on sink & porcelain fixtures -corrosive water reacts with brass or copper pipes/fittings Copper 1.3 mg/l (action level)

----

-cat ion exchange
-R-osmosis
-distillation
Brown-red water, stains & discolored clothing -naturally occurring iron
-iron bacteria
-leached from old pipe
Iron 0.3 mg/l(2º MCL) ---- -cat ion exchange
-distillation
-chlorination
-filtration
Yellow Water -water passing through peaty soil & vegetation
-"yellow" iron in water
Tannins, Humics, Lignins 15 color units
(2º MCL)
---- -activated carbon
-anion exchange
-R-osmosis
-distillation
-chlorination
Black staining of fixtures and laundry -naturally occurring usually found
with iron
Manganese 0.05 mg/l
(2º MCL)
---- -cat ion exchange
-distillation
-chlorination
-filtration
Blackening & pitting of stainless steel sink -excess salt concentration
-road salting
-improper treatment
-brine backwash from water softener
Chloride 250 mg/l
(2º MCL)
-problem for individuals with hypertension -R-osmosis
-anion exchange
-distillation
Milky water excessive air or particles in water particles, air 0.5 to 1 NTU (95% of samples) max of 5 NTU in some situations (2º MCL)  ---- -service filters
-let water stand
-clean hot water heater
Musty, earthy smell -algae
-vegetation
-organic matter
(leaves, algae)
---- ---- -activated carbon
-see other sources
Chlorine smell -excessive chlorination or inadequate dechlorination chlorine ---- ---- -activated carbon
-R-osmosis
-contact lo
Detergent smell (foamy water) Wastewater discharge into water supply -foaming agents
-dilute sewage
0.5 mg/l
(2º MCL) 
-risk of disease if bacteria present
-harm to infants
-eliminate source
-chlorination
Rotten egg smell -sewage
-sulfate reducing bacteria
Hydrogen sulfide
(gas)
Add 3 threshold odor number
(2º MCL)
gastrointestinal -activated carbon
-aeration
-oxidation
Alkali taste -high mineral content in private well and/or any water supply Minerals 500 mg/l
total dissolved
solids (2º MCL) 
---- -R-osmosis
-anion and cat ion exchange
-distillation
Metallic taste -high mineral content
(naturally occurring)
Iron, Manganese, Copper Iron 0.3 mg/l
Manganese 0.05 mg/l
Copper 1.0 mg/l
(2º MCL) 
---- -cat ion exchange
-R-osmosis
-distillation
-chlorination
Salty, brackish taste -road salting
-salt water intrusion
-naturally occurring in arid regions
-water softener backwash
sodium, chloride, sulfate, salts sulfate 250 mg/l
chloride 250 mg/l
(2º MCL) 
problems for individuals with hypertension -distillation
-R-osmosis
Soap curd, scum, white deposits in pipes, kettle, water heater elevated levels of calcium & magnesium salts hard water ---- ---- -cat ion exchange
-water softener
Grittiness, Abrasive defective well screen or inadequate public treatment fine sand, grit ---- ---- -sand trap ultra filtration

 

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Energy Program
Sponsored by:
Department of Environmental Quality


TIPS ON DRIPS

Conserve energy, money, and water by following these water and energy saving tips, and you will see a difference in your next water bill.

1.  Make sure water is off while you shave or brush your teeth - 4 to 10 gallons saved per day.
2. Taking a bath? Fill the tub half full - 16 gallons saved per day.
3. Five minute showers - 21 to 26 gallons saved per shower.
4. By washing a full load of dishes in the dishwasher or washing a full load of clothes in the washing machine - 15 gallons saved per day.
5. Install a low flow shower head - 20 gallons saved per day.
6. By filling two (2) plastic one quart bottles with sand or gravel, and placing them in the toilet tank you can reduce the amount of     water used per toilet flushing - save 10 or more gallons per day.
7. Repair Leaks as soon as they occur.
    a. 1/32 inch stream stopped - saved 6,166 gallons per month.
    b. 1/16 inch stream stopped - saved 24,700 gallons per month.
    c.  1/8 inch stream stopped - saved approximately 99,000 gallons per month.
    d. 1/4 inch stream stopped - saved approximately 400,000 gallons per month.
NOTE: Leak sizes and gallons lost per month are at 60 PSI.

Routine toilet tank inspection

Check tank water levelIf the water in the tank is too high, it will spill over into the overflow tube and be wasted.  The correct water level is about 1/2 inch to 1 inch blow the top of the tube.  To lower the water level either adjust the screw on the ball cock or bend the arm down until the correct level is achieved.

Repairing Toilet Leaks:  
1.  By removing the lid from the toilet tank, drop in some type of dye into the tank, wait 5 minutes, if the dye appears in the toilet bowl, there is a leak.
2. Check your flap or flush valve to make sure it is reseating properly.  If it is worn or corroded, it needs to be replaced.
3. If you have to jiggle the handle to get it to stop running, check the lift chain or guide to make sure it is not hung up or out of alignment.
4. Check the water level in the tank; if the water level is too high in the tank it will spill over into the overflow tube and be wasted.
5. Ball cock runs:  If water doesn't shut off at all, replace the ball cock and flapper, or replace toilet with a new 1.6 GPF (gallons per flush) toilet.

 

 

Good reasons to conserve water

In attempt to help educate you on how to save water and energy without sacrifice and cut use in your home by up to 50%. Not only do you conserve water, a precious resource, but you can save energy and money, and it's something every American can do to clean up the environment.

1. Clean up the environment by saving water and energy at home. Using less water means less chemicals to process dirty water, less sewage, and less energy required to heat water.
2. Rate increases of taxes and utilities will be held down, allowing your utility system to minimize the wear and tear of its existing plant equipment.
3. Save up to 47,000 gallons of water per year, not to mention money saved on your utility bill.
4. Faucet leaks big or small, dribble away water and can be costly. A leaky faucet can waste up to 20 gallons per day. If the water is hot, you are using energy to heat it, which can be expensive.

Pumps and Motors

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Energy Efficiency
Energy efficiency in a treatment plant requires extra effort on part of the staff.  
It requires a commitment from the management, and the ability to look ahead.

There are several steps to achieving this goal:
1) Establish maintenance programs
2) Conduct energy audits
3) Implement audit recommendations
4) Co-generation
5) Improve equipment and controls
6) Understand electric rates

Energy costs make up about 30% of the budge, and in the next 20 years will increase by 34% to 45%. 
Without steps to reduce system consumption now the cost will cripple most small utilities.

Our goal is to lower our dependency on energy and increase our awareness of more effective ways to do the same job more effectively.

Establish Maintenance Programs
Regular and preventive maintenance is one of the first steps of any well-run plant, which allows the operator to know what is happening in his plant. Regular testing of equipment will tell you if the equipment is operating as it should.  The manufacturers recommended maintenance and inspection guidelines are the best information on performance testing.  
Testing or running redundant or backup equipment on alternative fuels or at off-peak hours is a way of saving electricity.

Tip #1
When testing emergency generators, instead of letting them run idle use them to power lift stations during testing.

Conduct Energy Audits
Energy audits are not as complex as they sound. They require time and commitment from everyone. Audits may include a review of operating procedures, plant walk through, modification examination, and cost assessment.  
These audits are sometimes subsidized by power companies and can be performed by plant personnel.

Audit Recommendations:

  • Conduct periodic pump test

  • Run generator during testing and peak load

  • Install or replace with high efficiency motors

  • Replace oversized motors during repairs

  • Implement as many changes as possible

Implement Audit Recommendations
Starting the measures outlined by the audit report can be a slow process, particularly if large investments of capital are required.  
By prioritizing the list, changes can be made as monies become available. 
Rebates or other incentives can be factored in long term financing.

Load management measures and Energy Management Systems are ways of shifting or saving energy usage. These measures require planning. The purpose is to stagger equipment usage, monitor process levels and use alternative fueled equipment.

Co-Generation
The operation of backup generator during peak demand periods and during testing can help reduce energy costs by 20%. Instead of just letting the generators run for 4-6 hours with no load, use them to operate lift stations, pumps, or blowers.  This takes a little manpower, but saves on electricity.

Projected Electricity Use for Wastewater Treatment

1988

2010, When needs are met

Level of treatment

Unit Electricity use, kW/mil. gal Flow rate, MGD Total electricity required, kWh/d Design capacity, MGD Total electricity required, kWh/d
Lees than secondary 661 3,840 2,538,200 385 254,500
Secondary 1,212 12,282 14,885,800 18,990 23,015,900
Greater than secondary 1,578 11,825 18,659,900    
  1,726     23,117,39,900,000  
No discharge 400 789 315,600 1,769 707,600
           
TOTAL

36,399,500

63,878,000


Improve Equipment and Controls
Improving equipment and the controls for that equipment is easier than you think. It does not require replacement, but changes to operation and maintenance. By making the equipment operate properly you also make it operate more efficiently: replace worn belts, adjust belts to proper tension, change to fine pore diffusers, check and replace worn bearings o aerators. Check pump operations for proper operation, replace leaking seals, worn impellers, and restrictions. Replace burnt motor and pumps with high efficiency units. Check to see if adjustable speed motors and controls would be beneficial, and make sure the pump curve is correct for your application.

1) Check for leaks in air system
2) Check for leaks in pump seals
3) Test pumps for proper operation and sizing
4) Replace motors and pumps with high efficiency units
5) Make as many improvements as allowed

Understand Electric Rates
Understanding electrical rate structures is probably the toughest part of the job, but there is help. Contact your electric company and ask to have a representative come out and go over your rate structure.  Understanding peak loads, time of day rates, KW usage and maximum connected load charges will help reduce your cost. Some utilities have what is called a UTILITY-INITIATED MANAGEMENT PROGRAM. There may be incentives or special rate programs to help reduce energy cost for the plant.

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