Water & Wastewater Treatment Equipment Serving Tucson, AZ
Precision lime feed, biosolids stabilization, drying, storage, and truck loading systems engineered by RDP Technologies for Tucson and Southern Arizona municipal facilities.
Request a Consultation View ResourcesTrusted Process Equipment for Tucson Water & Wastewater Plants
Across more than 45 years, RDP Technologies has engineered process equipment that holds up under hard use, backed by steady field performance and a practical design mindset earned on working plant floors. Utilities throughout Southern Arizona depend on RDP for accurate, rugged systems that stay simple to run and easy to maintain over decades of service.
Biosolids Drying Systems for Tucson Wastewater Plants
Colorado River shortages on the Lower Basin have put Arizona utilities under real pressure to stretch every water and resource dollar, and biosolids handling is no exception. For Tucson-area plants weighing longer hauls to desert reuse and disposal sites, cutting the weight that goes on each truck is one of the clearest savings available. The RDP-Fenton sludge dryer works on a repeating batch cycle, so operators can tune drying time to the shifting cake dryness that comes off dewatering rather than locking into a fixed rate.
The batch design shrugs off the inlet swings that throw continuous dryers off stride when feed quality moves without notice. Teams operating the unit tend to comment on how rarely it needs a hands-on touch once a reliable recipe is set.
Product coming off the dryer is dramatically lighter and smaller in volume, which lowers trucking outlays and opens the door to fertilizer, soil amendment, and energy recovery markets across Arizona and the wider Southwest. Placed downstream of RDP lime feed or storage equipment, a Tucson plant gains a single-source biosolids line with common controls and one point of support. The design put long service life and easy operation first from day one, and the installed fleet shows it in real-world numbers.
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Lime Slaking & Feed Systems for Tucson Water Treatment Facilities
Tucson Water once ran almost entirely on pumped groundwater, but the utility now leans heavily on Central Arizona Project supplies delivered from the Colorado River, storing that water underground through the Clearwater recharge projects in the Avra Valley and recovering it as demand requires. Blending recharged CAP water with native groundwater brings chemistry challenges around pH, hardness, and corrosion stability that lime feed is well suited to manage. With Colorado River allocations tightening under ongoing shortage declarations, precise treatment of every source matters more than ever. RDP designs lime slaking and feed systems built to hold that chemistry steady across a complex multi-source system.
Tekkem slakers work off load cell measurement, matching a weighed charge of quicklime to a weighed charge of water and keeping the reaction within the proven 180°F to 190°F band. Because control is based on weight rather than volume, dosing stays genuinely precise and crews can dial slurry strength anywhere between one and thirty percent to fit plant needs.
That same Tekkem unit runs as a hydrated lime feed system with no mechanical changes, a real convenience as lime supply and pricing move across the Southwest. A recirculating slurry loop paired with pinch valve and flow meter dosing delivers accurate feed at each point a facility calls for, and with a single moving part inside the reaction tank, upkeep stays low and predictable under continuous operation.
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Biosolids Storage & Precision Truck Loading Systems
The Pima County Regional Wastewater Reclamation Department operates the Tres Ríos and Agua Nueva water reclamation facilities along the Santa Cruz River, treating the bulk of metro Tucson's wastewater after the major upgrades carried out under the Regional Optimization Master Plan. Those plants generate steady daily biosolids, and Arizona's open desert offers land application outlets, though often at some distance from the plant. Dependable storage and loadout equipment keeps a consistent flow of trucks moving to those sites on schedule through brutal desert heat. RDP Technologies builds biosolids storage systems and precision truck loading systems that carry the entire sequence, from dewatering to the loaded truck rolling out, on automatic control.
Moving floor technology inside live bottom bin storage keeps thick sludge cake moving along steadily, heading off the bridging and rat-holing that trip up conventional steep-sided hoppers. The precision truck loading system runs loadout by itself, finishing most loads within minutes and staying within a few hundred pounds of the operator's set target.
Over three decades and close to three hundred biosolids conveying installations, the bay layout has been refined to keep trucks clean, departures punctual, and operator involvement minimal. Because loading proceeds unattended, Tucson-area staff can redirect their hours to more valuable work around the facility. For a program trucking to distant desert land application sites through triple-digit summers, that automation raises throughput and keeps overtime in check.
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Biosolids Lime Stabilization & Pasteurization Solutions in Tucson, AZ
Arizona's biosolids program runs under ADEQ oversight, and while the state's abundant open land has long supported Class B application, tightening scrutiny around emerging contaminants and hauling economics is nudging utilities toward Class A material that carries broader reuse value. RDP Technologies has supplied EPA 503 compliant lime-based systems since those federal rules first took effect, covering both Class A biosolids treatment and Class B biosolids stabilization at facilities across Arizona and the Southwest.
EnVessel Pasteurization counts among the most widely used Class A processes in the nation, with a fleet exceeding 70 installations. It brings lime together with a controlled measure of added heat in place of heavy lime overdosing, holding chemical demand down while consistently clearing the time, temperature, and pH thresholds that a full pathogen kill requires.
Enhanced Pasteurization shifts the process into a sealed sequencing batch reactor, where lime pushes pH past 12 and controlled heat wraps up disinfection. Both approaches stand as proven pathogen reduction equipment, documented in published case studies and long municipal service records. For Tucson-area facilities scoping capital projects against ADEQ requirements and evolving reuse expectations, they are regulator-recognized options with deep, well-supported track records.
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Custom Engineering & Process Equipment Support Serving Tucson
Water and wastewater infrastructure across the Tucson region operates in one of the most demanding environments in the country, shaped by Sonoran Desert heat, monsoon-season flash flooding through the washes and arroyos, chronic drought, and the aquifer management goals set under Arizona's Active Management Area framework. RDP Technologies brings over 45 years of custom process equipment engineering to capital projects across Pima, Pinal, Santa Cruz, and neighboring Southern Arizona counties.
Since we keep design, fabrication, and controls programming in-house, we can build equipment around existing tankage, tight site conditions, and the routines operators already rely on, rather than dropping a stock package into a poor fit. Our control platforms link cleanly with SCADA and meet the detailed reporting the Arizona Department of Environmental Quality and EPA Region 9 require.
We stay directly engaged with municipal engineers, consulting firms, and operations staff from the earliest scoping through commissioning and long-term support. Rugged equipment, dependable process results, and practical technology that keeps performing are the principles behind every project we take on. Tucson-area facilities gain a single accountable manufacturer that designs, builds, and stands behind its equipment for the long haul.
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