Northwest Wastewater Treatment Plant
The area served by the Northwest Wastewater Treatment Plant is shown on the map for Springfield's northern basins. On the east the Northwest Wastewater Treatment Plant serves the Interstate 44, U.S. 65 area, City of Strafford and to the west the Springfield - Branson Regional Airport area and the City of Willard. The drainage basins served are Rainer Branch, Spring Branch, Pea Ridge and South Dry Sac.
- In 1994 the Northwest Wastewater Treatment Plant was honored by being awarded the Missouri Environment Association's Small Facility Safety Award at its annual meeting.
- The Plant has operated for more than 7,665 days, January 1, 1992 - January 1, 2014, without a lost time accident.
The Northwest Wastewater Treatment Plant has been awarded the following NACWA Peak Performance Awards:
Continue efforts to find reliable methods for biosolids disposal. Thickening the Northwest Plant solids to 4% - 6% and hauling the solids to the Southwest Plant for further processing is the most economical solution. At this time a gravity thickener designed to produce 2% solids is being used. A more reliable way of increasing waste solids is using a Rotary Drum Thickener to reduce hauling and treatment cost.
Phase Three, Completed 2009
Carollo Engineers were hired to design the expansion of the Northwest Treatment Plant to meet expected growth of Springfield's north side. Completion of the plant expansion provides the following:
- The plant capacity has increase to a maximum monthly daily peak average of 9.5 million gallons per day basis which is about a 50 percent increase.
- Much of the plant including blowers, pumps and valves will be automated to provide better process control, while saving energy.
- New Influent pumping and grit removal to allow for future expansion and more reliable treatment
- Provision for phosphorus and nitrogen removal through the Installation of equipment and tanks. The design of the tanks will allow for future expansion.
- Replacement of aeration blowers, modification of aeration tanks and installation of monitoring and control equipment will provide the ability to optimize treatment and reduce energy costs. Aeration tank dissolved oxygen level set points will be maintained automatically by in-tank dissolved oxygen probes that control air flow.
- Addition of secondary settling clarifier will provide better wet weather flow treatment and backup for increased reliability.
- Hazardous chlorine and sulfur dioxide gases have been replaced with ultraviolet lights for disinfection of flow before discharge.
- All of these improvements were made to provide the best water quality in the State of Missouri for now and in the future. The expansion was designed to provide a safe and environmentally friendly environment while keeping operating cost at a minimum.
- Plant personnel, in conjunction with personnel from other sections of the Clean Water Services Division, have adopted and are applying a total team approach toward improving the operation and maintenance of the Northwest Wastewater Treatment Plant.
- The goal of the team is to continuously identify areas in which safety, quality and cost savings can be improved within the plant and the Division. Once identified, personnel explore these areas to determine the feasibility of making the changes that provide the most positive impact to the plant.