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CLIENT: Paper / Board Manufacturer
LOCATION: Lafayette, Indiana
HIGHLIGHTS: Wastewater lagoon closure, pretreatment system design and construction, permitting, teamwork approach
Water Treatment
A Paper / Board Manufacturer (PBM) retained Environmental Services, Inc. (ESI) to close a wastewater treatment / storage lagoon and provide a replacement storage tank for their paper mill wastewater pretreatment system. The mill wanted to close the lagoon as an environmentally pro-active measure for protection of groundwater and Pearl Creek, a tributary to the Wabash River. In working with the production and management staff, it was jointly determined that the project actually needed to include a detailed design of an upgrade of the pretreatment system. ESI revised the project scope to provide the mill with the upgraded water treatment system within the available funding, which would still enable to mill to connect to plant improvements.
Lagoon Closure
ESI provided a turnkey closure of the existing wastewater lagoon. The construction date of the lagoon is unknown and may date back to the mill construction in the 1890s. The lagoon was approximately 100 feet by 100 feet by 24 feet deep. The lagoon was used for facultative treatment of wastewater until 1990 when the mill installed a sequencing batch reactor (SBR) pretreatment system. Since 1990, the lagoon was used for the wastewater storage (sludge) prior to returning water to the production process or discharge to the pretreatment system.
Pretreatment System Upgrade
ESI provided detailed design services for the upgrade of the PBM pretreatment system. Water treatment improvements included:
- Conversion of a 100,000 gallon aboveground storage tank (AST) to a SBR.
- Addition of a 400,000 gallon AST for wastewater storage.
- Addition of a nutrient feed system.
- Addition of wastewater transfer facilities for filling/discharge from the new SBR, connection to the existing pretreatment system, and return of stored water to the production process.
- New instrumentation and remotely actuated control valves which were designed for connection into a future plant-wide computer control system.
- Addition of a process equipment building to house pumps, blowers, and the chemical feed system and a treatment system operator=s office.
- Addition of a containment pad and wall.
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