Brackish Stream Treatment Plan

Possum Engineering:Josh Ogle

Meg PrzybylaKyle Smith

Alex Stodtmeister

12 April 2013

Problem

• Brackish Stream running backyard

• Desire to “go green” and make use of stream

• Possum Engineering chosen to explore the option and choose the most viable option

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Field Work

• GPS Mapping of Dr. Chandler’s Property

• Water Quality Analysis

• Water Capacity Analysis

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Field Work - GPS Mapping

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Results - GPS Mapping

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Field Work - Water Quality Analysis

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Field Work - Water Quality Analysis

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• On-site analysis with water quality sondes– Dissolved oxygen, specific conductivity,

temperature, pH, chlorophyll• Samples taken for further testing at BYU– Total solids, total suspended & volatile solids– Chemical oxygen demand– Metal concentrations

Results – On-site Analysis

LocationTemp

[°F]

pH

[Units]

SpCond

[µS/cm]

Sal

[ppt]

TDS

[g/l]

LDO%

[Sat]

LDO

[mg/l]

Chlorophyll

[µg/l]

Mouth 60.09 8.86 4057 2.21 2.6 105.7 8.61 0.36

Throat 58.6 8.90 4060 2.21 2.6 106.0 8.79 0.35

SD 61.1 8.84 4053 2.21 2.6 106.8 8.61 0.36

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Results – Solids and COD

LocationTotal Solids

[mg/L]Total Suspended Solids [mg/L]

Total Volatile Solids

[mg/L]

COD

[mg/L]

Mouth 3904.1 2.64 1.025 4.3

Throat 3870.4 2.65 0.395 4.6

SD 4645.6 3.25 0.44 3.6

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Results - ICP

IonMouth

[ppm]

Throat

[ppm]SD [ppm]

Ca 653.80 746.90 672.30

K 86.55 75.36 65.67

Mg 180.80 181.80 158.90

Na 132.70 139.00 114.60

S 470.90 523.80 449.20

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Results – Water Chemistry

Mineral log IAP Sat. indexAragonite -6.479 1.803Artinite 8.082 -2.21Brucite 14.879 -2.877

CaCO3xH2O(s) -6.479 0.61Calcite -6.479 1.954CaS(s) -9.61 -20.79

Dolomite (disordered) -13.276 2.997Dolomite (ordered) -13.276 3.587

Epsomite -5.046 -2.853Gypsum -4.728 -0.112

Halite -4.142 -5.671Huntite -26.87 2.478

Hydromagnesite -12.309 -4.8KCl(s) -4.558 -5.458Lime 15.197 -18.618

Mineral log IAP Sat. indexMagnesite -6.797 0.778

Mg(OH)2 (active) 14.879 -3.915Mg2(OH)3Cl:4H2O(s) 19.207 -6.793

MgCO3:5H2O(s) -6.797 -2.257MgS(s) -9.928 -27.608

Mirabilite -7.107 -5.536Natron -8.858 -7.168

Nesquehonite -6.797 -2.266Periclase 14.879 -7.575

Portlandite 15.197 -8.247Sulfur -11.135 -9.084

Thenardite -7.107 -7.481Thermonatrite -8.858 -9.555

Vaterite -6.479 1.361

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Slingshot Option

• 264.2 gallons of water/day

Cost - $100,000

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Heat Exchange Option

Cost - $20,000ROI - $1,200/year(Cutting Power Bill by 42-50%)

• 15,000 linear feet of pipe lay coiled 10 feet underground in horizontal slinky loop

• Paxman Heating installed Dr. Astle’s system

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Water Purification Option

Total Cost ≈ $15,500ROI ≈ $420/year

(If 50% of monthly water use provided by RO System)

COST ≈ $500

COST ≈ $14,250

COST ≈ $250

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Legal Constraints• After receiving all

Water Users' Claims, the State Engineer then prepares a proposed determination of water rights of all water users in the drainage or sub-drainage that is served on water users and filed in court

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Final Recommendation • Ground Heat Exchange System

Benefits:• Cut Power Bill in half

Investment Cost:• $20,000

Return on Investment:• $1,200 per year• Pay for itself in 16 years

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Acknowledgements• Dr. Mike Chandler• Dr. Gus Williams• Dr. Jim Nelson• Dr. Wood Miller• Dr. Craig Astle• Craig Hammer• Paxman Heating• Jay Sandberg, P.E.• Phil Stewart• Zola Adjei