Global Water – Maricopa Palo Verde WWTP 5MGD Expansion
NCS provided preliminary design, final design, groundwater and reuse permitting services for the 5 MGD expansion of this facility. The innovative treatment concept uses an Integrated Fixed Film Activated Sludge (IFAS) process, along with anoxic and aeration tanks, and clarifiers. The new process replaces the existing sequential I batch process. We designed new IFAS basins, blowers, secondary clarifiers, 30 MGD intermediate pump station (with recycle to supply IFAS), yard piping, and all process piping. We also assisted with construction phase services including startup, submittal reviews, and special inspections.
Town of Superior – WWTP PER Assessment, Design, and Construction
NCS worked with the Town of Superior to upgrade their WWTP using CDBG and USDA funds. We performed a condition assessment of the facility and we found that the plant needed repairs, rehabilitation, and upgrades to prevent failure and improve safety. The PER included analysis and recommendations to rehabilitate the plant and create a redundant system that can be used in the event of a needed shut down for maintenance while retaining its existing treatment level.
Liberty Utilities – Gold Canyon & Entrada Del Oro Design
NCS was selected by Liberty Utilities to design upgrades to these two wastewater treatment plants (WWTPs), located in the suburbs east of Phoenix. For the 0.5 MGD Gold Canyon WWTP, we designed solids handling improvements including replacing the belt press, and clarifier piping. We also considered the advantages and disadvantages of centrifuges, belt presses, and plate/frame presses, prior to rebuilding the centrifuge as the preferred option. Only one mechanical screening device was installed and in use; therefore, NCS designed a second grit removal and screening device. Another improvement involved replacing the tertiary piping and valves.
For the 0.1MGD EDO Plant, our solutions included aeration diffuser piping that can be changed to metal, retrofitting blowers with dampers to optimize the air output and add controls to adjust air to measured dissolved oxygen (DO). Algorithms were used to obtain a feedback loop between DO sensors and motorized air dampers to reduce airflow and horsepower in centrifugal blowers.
Aneth/Montezuma Creek – Iron, Manganese & Arsenic Treatment
NCS provided preliminary and final design services for the Aneth and Montezuma Creek Water Treatment Systems. This included two separate treatment plants at the Aneth System for iron, manganese, and arsenic removal. The innovative processes included treatment without chemicals using catalytic adsorption media for iron and manganese and iron media for arsenic. NCS also performed pilot testing to confirm the process design parameters and verify performance. NCS provided all mechanical, electrical, and civil design services for the four treatment plants along with bid assistance. NCS also provided CM services for these projects including inspection, submittal review, and contract management.
City of Goodyear – Site 12 Treatment Expansion
NCS serves as the Prime Engineering Firm for this Design-Build project, working with Hunter Contracting. As part of the City’s efforts to meet future water demands, the City of Goodyear is expanding their groundwater and surface water resources. The Site 12 facilities include two new wells to produce 3,000 gpm (Wells 24 and 25), expansion of the RO treatment system, construction of a new treatment building, increasing the booster pump station capacity, construction of a new 2.0 MG storage tank, and other site improvements including enhancements to the site wall and access roads. Other project elements include a break (equalization) tank, three new 1.5 MGD RO skids, disinfection system, site pipelines, chemical feed facilities, site grading, site masonry walls, electrical system improvements, SCADA, PLC programming, and a new arsenic removal system for the RO bypass. Design is complete and NCS is providing permitting, startup, and construction phase services for this landmark project.