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Water and Wastewater Plant Directory
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Alpena, Michigan, USA
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Alpena Water Recycling Plant
210 Harbor Drive
Alpena, Michigan, 49707
USA
Contact Information:
Contact: Michael Glowinski
Email:
michael.glowinski@earthtech.com
Telephone: (989) 354-4891
Fax: (989) 354-8472
Plant Operation: Municipal
Processing: Wastewater
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Web site:
http://www.alpena.mi.us/contractedservices/etos/WaterRecyclingPlant/WaterRecyclingPlant.htm
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Plant/Process Description:
The original plant became operational in 1953 and
many of the treatment units remain in use today.
The first treatment equipment consisted of a pump
station, flow meters, four clarifiers to
physically remove solid materials from the waste
stream, and two sludge pumps. Two Anaerobic
digesters (Primary and Secondary) were used to
biologically reduce the organics in the solids
that are removed as part of the treatment
process.
Sludge drying beds were used to dewater and dry
treatment residuals. The final treatment process
involved the addition of chlorine gas to kill
pathogenic organisms before the treated
wastewater was discharged to the Thunder Bay
River. The plant removed about 15 to 20% of the
pollutants that entered the facility.
In 1972, the plant was upgraded to improve
pollutant removal capability. Using grant funds
from the USEPA, secondary treatment was added to
the facility. A biological treatment process
called Activated Sludge was used to enhance
removal of dissolved pollutants from the
wastewater. This addition improved pollutant
removal rates and the plant regularly achieves 90
to 95% pollutant removal efficiency.
Any wastewater treatment process generates solids
that must to stabilized and recycled. Two 300,000-
gallon anaerobic digesters are used to treat the
solid material generated by the Alpena Water
Recycling Plant. The digesters are similar to a
septic tank, except modifications are made to the
process to speed up the bacterial activity. The
primary digester is heated to between 90 and 100
degrees F and the contents of the tank are mixed
using compressed digester gas.
A valuable byproduct of the anaerobic digestion
process is methane gas. This energy source is
used to fire the plant boiler and fuel a 4-
cyclider engine that drives a raw wastewater
pump. Utilization of methane gas from the
digester saves the Utility about $15,000 in
energy costs.
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Owner:
City of Alpena
Web site:
http://www.alpena.mi.us/
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Operating Company:
Earthtech
Web site:
http://www.earthtech.com/
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Directions:
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Disclaimer:
Water and Wastewater.com provides the information on
this page for reference purposes only. We do not certify
the accuracy of the information provided by third-party
individuals for this listing.
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