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CONTRACT K-1819-82: A CONTRACT BY AND BETWEEN THE NORMAN UTILITIES AUTHORITY AND ALAN PLUMMER AND ASSOCIATES, INC., IN THE AMOUNT OF $67,000 TO PROVIDE DESIGN, SURVEYING, BIDDING, AND LIMITED CONSTRUCTION SERVICES FOR THE COMPOST RE-USE PUMP STATION PROJECT.
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BACKGROUND: The Supplemental Environmental Project was created to provide for effluent reuse at Yard Waste Composting Facility (Compost Facility) located adjacent to and southwest of the Water Reclamation Facility (WRF). Disinfected wastewater effluent may also be used, if permitted by the ODEQ, for irrigation purposes offsite such as at the Compost Facility. Wastewater reuse can reduce water demand and may help delay the need for expensive water supply projects. This project will install piping from the WRF to the Compost Facility and use disinfected effluent for irrigation purposes.
The relocated Composting Facility opened in the existing location in September 2009 and includes a looped irrigation water system to supply potable water for proper moisture control and curing of the compost. Yard waste including grass, leaves, shrubs, and tree limbs two inches in diameter or less are accepted at the composting facility. Yard waste is ground into mulch by a tub grinder, mixed in the correct proportions (nitrogen to carbon or green waste to brown waste) to aid decomposition and laid out in long rows called windrows. Initially, the windrows are about six feet high and sixteen feet wide, are kept moist with the aid of spray irrigation and mixed by turning about three times each week. The heat generated by the decomposition process raises the internal windrow temperature to approximately 130 degrees Fahrenheit. The composting process is complete in 90 to 120 days and the volume of mulch is reduced about 50% as the mulch decomposes. Cured compost is then released to our citizens.
The Water Reclamation Facility (WRF) operates under an Oklahoma Pollutant Discharge Elimination System (OPDES) permit last i...
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