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Snack Food Wastewater Pretreatment Plant
Background-
A snack food company in the Northwest had been experiencing heavy surcharges with pretreatment parameters of the process effluent directly to the city. The client evaluated the need for a new pretreatment system (PTP) to alleviate the surcharges and to comply with the city's future pretreatment standards. The sytem was to pretreat 971,000 gpd from a potato and corn snack food operations before being discharged to the municipal sewer. The capital cost of the pretreatment system would defray the cost of the surcharges in a matter of a few years.
Project Description-
The PTP consisted of screening, primary clarification, solids blending with screenings and belt press dewatering system. MRV was awarded the contract to design, permit the pretreatment system through the state and local authorities, install the new PTP and meet a tight deadline for the new permit standards. Operation and maintenance manuals were also part of the permitting for discharging to the city facility. The recovered solids are dewatered and are now a saleable byproduct. Oil and grease is also recovered from the clarification system and recycled. The system was sized, hydraulically and organically, to allow for future production increases by as much as 35%.
The project included a 60 ft. diameter by 12 ft. SWH solids recovery clarifier, solids recovery/dewatering system, new 70 ft. by 50 ft. solids recovery operations building, and associated pumping equipment. The PTP is capable of treating 971,000 gpd with an influent organic load of 1,300 mg/L BOD and 1,600 mg/L TSS.
Project Scope-
Design and constuction of a two-story 70'x50' precast operations building, installation of over $1,000,000 worth of capital equipment, completely automated llen-Bradley control system with operator interface, remote alarm annunciation and connection to the manufacturing plant's data highway, and the design and installation of a solids recovery system consisting of a macerator, 12 meter belt filter press, conveying system and truck loading facility.
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