Aerial view of the Warren, Maine lagoon system. Photo courtesy of Woodard and Curran.

Lagoon Systems In Maine 

Systems In Maine

An Informational Resource for
Operators of Lagoon Systems

Mars Hill Wastewater Lagoon System - Mars Hill  Maine. Photo Courtesy of Wright-Pierce Engineers.
 Mission  |  Search  |  Acknowledgements  | Discussion Group |  Contact Us  | Links

Design & Operation
Lagoon Aeration
Tech Papers
Operation Articles
Lagoons In Maine
The Laboratory
Maine Lagoon News
Lagoon Biology

2003 Maine Wastewater Salary Survey as conducted by the Maine Wastewater Control Association

2003 Maine Wastewater Rate Survey conducted by the Maine Rural Water Association

Maine DEP Monthly
O & M Newsletter

Maine and WEF's
Operation Forum

Penobscot Watershed and Development of a TMDL 

EPA Binational Toxics

Maine Rural Water

Maine Wastewater
Operator Certification

Maine Is Technology

Maine Wastewater Control Association

Maine WasteWater Control Association

Wastewater Engineering



Guilford Maine





 Guilford Maine

   The goal of improving the water quality of the Piscataquis River is closer to reality with the completion of the pollution control facilities designed by Wright-Pierce for the Towns of Guilford and Sangerville. The Guilford-Sangerville Sanitary District is responsible for the treatment of wastewater from these two towns and from Guilford Industries, a major textile manufacturer. Planning for the project dates back to 1976 when facilities studies were first begun. Prior to the construction of the new sewer system and treatment facility, untreated municipal and industrial wastewater from the villages of Guilford and Sangerville was discharged into the Piscataquis River creating public health concerns. Of particular concern was the adverse effect that these raw sewage discharges were having on the river's fish population and on downstream drinking water supplies. After careful evaluation of the treatment options, Wright-Pierce recommended the construction of a new sewer system and aerated lagoon treatment process, with possible future post treatment to handle residual pollutants. This system provides the most cost effective means of achieving the required high level of treatment needed to protect the river and downstream water supplies. The completed facilities include 40,000 feet of gravity sewer, 5 pump stations, 16,000 feet of force main and a 4 cell aerated lagoon facility.

aerated lagoons

   The largest of the pump stations includes comminution and chemical addition facilities designed for a peak pump capacity of 3,000 gallons per minute. The lagoons, lined with high density polyethylene to protect the groundwater, have a total volume of 38 million gallons. Disinfection of the treated effluent is achieved by chlorination followed by dechlorination to reduce the detrimental effects of chlorine on the Piscataquis River.

      Due to the large volume of high strength industrial waste discharged by Guilford Industries, the treatment system required the flexibility to modify its operations in response to changes in industrial waste volume, strength and characteristics. System flexibility is achieved by using variable effluent recycle, bypass/step feed capabilities and a fine bubble aeration system designed to allow positive, adjustable distribution of air.

     Recycling of the effluent enables the operator to dilute the high strength incoming waste with treated effluent. It also allows seeding of the incoming wastewater with bacteria acclimated to the waste.


Aerated Lagoons - Guilford, Maine
The facility's wastewater piping configuration allows for splitting of the influent flow to more than one lagoon. Any lagoon can be bypassed for maintenance reasons and its contents pumped to the other lagoon by the effluent recycle system.


     To provide the needed air for the treatment lagoons, Wright-Pierce incorporated a new 11 state-of-the-art" aeration system. The aeration system consists of fine bubble porous plate diffusers resting on the bottom of the lagoons. This system was selected for its comparative high efficiency and low maintenance coupled with its flexibility and reliability.

    Reedbeds have been constructed and are currently being used for sludge treatment.

The total construction cost of the wastewater collection and treatment facilities was approximately $8.8 million. State and federal grants paid for 80% of the cost. The Farmers Home Administration provided long-term financing of the District's share of project costs.


Basic Design Data

Design BOD Load: 3,600 lb/day
Design COD Load: 15,000 lb/day
Total Lagoon Volume: 38.0 MG
Design Detention Time: 38 days



Lagoon Specifications


Lagoons No.1 No.2 No. 3 No. 4
Volume 9.5 MG 9.5 MG 9.5 MG 9.5 MG
Lagoon Dimensions 475' x 250' x 18' 475' x 250' x 18' 475' x 250' x 18' 475' x 250' x 18'
Lagoon Acreage 2.72 acres 2.72 acres 2.72 acres 2.72 acres
Aeration Fine Bubble Fine Bubble Fine Bubble Fine Bubble
No. of Aerators in Each Lagoon 150 75 48 27

Comments: Total lagoon acreage is 10.9 acres or 474,999 square feet. Facility has (4) 125 horsepower blowers. Aeration system manufacturer is Environmental Dynamics, Inc. and diffuser model is the Reef I. There are 300 total aerators in the lagoons. Facility first began removing sludge in 1999.




System Information

Design Flow 1.0 MGD Peak Flow 2.21
Actual Flow 0.40 MGD
Discharge To Piscataquis River
Year Built 1988
Design Engineers Wright-Pierce
Septage Received No
Collector System 11 miles of gravity, 300+ manholes, 7 pump stations
Staff Size Two Full Time
Number of Users 550 Services
Billing Software Business Management Systems
Comments 70% of flow comes from textile plant. Sludge is deposited in reedbed for treatment. Reedbed is 3,000 square feet in area. Bed is triangular shaped, 5 feet in depth.

Process Schematic

Aerated Lagoons - Guilford, Maine


Bridge Construction Corp.
Augusta, Maine

Aerated Lagoons - Guilford, Maine

Operator Name Frank Ruksznis
Facility Address Dover Road
  Guilford, Maine 04426
Telephone (207) 876 - 4598
Fax (207) 876 - 4598

Back to Lagoons in Maine



aerated lagoons

  Copyright 2003 |  Home | Site Map                                          

Search  |  Contact Us  | Links