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Wastewater Treatment Cost Analysis

The document compares the costs of basic waste water treatment at two municipal plants processing 500,000 and 600,000 gallons per day respectively to a private facility called Big Fish processing 1,000,000 gallons per day including 20,000 gallons per day of septage. It provides average per gallon costs for operation, capital costs, and total costs for each. It also compares biosolids production and transportation costs between the municipal plants and Big Fish. Finally, it lists estimated annual electrical and gas utility costs for a 1,000,000 gallon per day municipal plant versus Big Fish.

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111 views8 pages

Wastewater Treatment Cost Analysis

The document compares the costs of basic waste water treatment at two municipal plants processing 500,000 and 600,000 gallons per day respectively to a private facility called Big Fish processing 1,000,000 gallons per day including 20,000 gallons per day of septage. It provides average per gallon costs for operation, capital costs, and total costs for each. It also compares biosolids production and transportation costs between the municipal plants and Big Fish. Finally, it lists estimated annual electrical and gas utility costs for a 1,000,000 gallon per day municipal plant versus Big Fish.

Uploaded by

sukanta60
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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BASIC WASTE WATER TREATMENT COSTS

PLANT I: Average 500,000 gpd

Operation / year $672,000.00


/ day 1,841.00
/ gallon $ 0.003682

Capital* / year $350,000.00


/ day 959.00
/ gallon $ 0.001918

Total $ 0.0056 / gallon

PLANT II: Average 600,000 gpd

Operation / year $600,000.00


/ day 1,644.00
/ gallon $ 0.002740

Capital* / year $350,000.00


/ day 959.00
/ gallon $ 0.001598

Total $ 0.004338 / gallon

*$6,000,000.00 @ 40 year amortization


SEPTAGE VALUES TO WASTEWATER:
Solids BOD COD TSS
Septage Average 1.5% 3800 20,000 15,000
Wastewater 0.02 % 200 450 250
Wastewater/Septage x75 x19 x44 x60

Average multiplier: 75+19+44+60 = 49.5


4

**If septage is 50 times stronger than wastewater, then 20,000 gal of septage is
equal to (20,000 X 50) 1,000,000 gal of wastewater.
BIG FISH ENVIRONMENTAL COSTS
@ 1,000,000 gpd (20,000 gal septage)

Operation / year $132,644.00


/ day 363.00
/ gallon $ 0.000363

Processing / gallon $ 0.0002687

Capital / year $204,540.00


(2,500,000.00 @ 20 year
amortization)

/ day 560.00
/ gallon $ 0.0005603

Total @ 20,000 gpd (1,000,000 gal.) $ 0.001192 / gallon


WASTEWATER PROCESSING COSTS

AVERAGE COSTS OF PLANTS I & II $ 0.004969/


gallon

BIG FISH @ 100% CAPACITY(365,000,000 gal.) 0.001192/


gallon

BIG FISH @ 55% CAPACITY (200,750,000 gal.) 0.002167/


gallon

(or 100% capacity of septage @ 20,000 gpd 0.0596/ gallon)

(or 55% capacity of septage @ 11,000 gpd 0.1084/ gallon)

**Cost of treating septage at WWTP $0.004969/gal. x 50 = $0.248 / gal.


BIOSOLIDS:

Wastewater Treatment Plants I & II:

550,000 gallons/ day @ 0.02% solids


or 200,750,000 gallons /year

EQUALS 670,000 gallons @ 6% solids

Big Fish

20,000 gallons / day @ 1.5% solids


or 7,300,000 x 1.5% x 8.3453 lbs/gal.
2000 lbs/ton

457 dry ton


or 1015 ton @ 45% solids
TRANSPORTATION COSTS:
(100 miles round trip or 3 hours)

Trucking 6% biosolids sludge 670,000 gallons


With 6,000 gal truck capacity = 112 trips
112 trips X 3 hours X $150.00/hour = $50,400.00 plus injection

Trucking 45% biosolids (1056 lbs/cy yd) = 1922 cy yds


1922 cy yds 50 cy yds/load = 39 trips
39 trips x 3 hours x 128.00/hour = $14,976.00 plus spreading
ANNUAL UTILITY COSTS:
1 million gallons per day WWTP facility or 20,000 gpd/septage

Municipal Big Fish


Electrical $87,000.00 $27,500.00
Gas $24,000.00 $18,606.00
6% solids 45% Exceptional Quality Biosolids

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