Water & Wastewater Treatment Equipment Serving San Diego, CA
Precision lime slaking, biosolids stabilization, drying, storage, and truck loading systems engineered by RDP Technologies for San Diego County municipal facilities.
Trusted Process Equipment for San Diego Water & Wastewater Plants
For over 45 years, RDP Technologies has been building robust equipment, backed by dependable process performance, based upon a foundation of practical technologies that simply perform. San Diego-area utilities count on RDP for clean, accurate, reliable systems that are simple and easy to maintain.
Biosolids Storage & Precision Truck Loading Systems
San Diego County’s wastewater treatment landscape includes the City of San Diego Point Loma plant, the North City Water Reclamation Facility, and the South Bay Water Reclamation Facility, along with major regional facilities operated by Padre Dam MWD and the Encina Wastewater Authority. Together these plants produce substantial daily biosolids volumes that must be moved consistently to permitted disposal and beneficial reuse sites located largely outside San Diego County itself. RDP Technologies engineers biosolids storage systems and precision truck loading systems that automate the full flow from dewatering through to the departing truck.
Moving floor technology built into live bottom bin storage keeps sticky sludge cake flowing reliably, eliminating the bridging and rat-holing common to conventional steep-walled hoppers. Sludge cake truck loading runs automatically through the precision truck loading system, with most loads completed within minutes and held to within a couple hundred pounds of the operator’s target weight.
Three decades and approximately three hundred biosolids conveying equipment installations have refined a layout that keeps trucks clean, departure times predictable, and operator involvement minimal at the bay. Because the cycle runs without continuous attendance, San Diego-area plant staff can redirect labor toward higher-value work elsewhere in the facility. For utilities running long-distance hauler rotations to Yuma County, Imperial County, and other out-of-region land application sites, that automation directly improves daily throughput and reduces overtime costs.
Biosolids Lime Stabilization & Pasteurization Solutions in San Diego, CA
San Diego County’s biosolids management has been shaped by some of the most restrictive Class B land application bans in the country, with neighboring Riverside and Kern counties limiting where San Diego-generated biosolids can ultimately go. The City of San Diego’s Pure Water Program and broader regional capital planning have placed additional emphasis on Class A pathways. RDP Technologies has been delivering EPA 503 compliant lime-based stabilization solutions since the federal rules were first established, supporting both Class A biosolids treatment and Class B biosolids stabilization at facilities across the state.
The EnVessel Pasteurization biosolids pasteurization system is one of the most widely deployed Class A processes nationally, with more than 70 installations operating across the United States. EnVessel combines lime addition with controlled supplemental heat, hitting the time, temperature, and pH thresholds required for full pathogen kill without the heavy lime overdosing that other lime-only Class A approaches demand.
Enhanced Pasteurization runs the cycle inside a sealed sequencing batch reactor where lime drives pH above 12 and controlled heating completes disinfection. Both pathways operate as proven wastewater pathogen reduction equipment, backed by published case studies and decades of operational data from municipalities nationwide. For San Diego-area facilities planning capital upgrades against expanding county-level restrictions and tightening California biosolids regulations, these are regulator-recognized options with strong long-term track records.
Lime Slaking & Feed Systems for San Diego Water Treatment Facilities
San Diego County’s drinking water portfolio is one of the most complex in the country, blending imported Colorado River water, State Water Project deliveries, local surface water from reservoirs across the county, and a rapidly growing share of potable reuse capacity. The City of San Diego operates three water treatment plants – Alvarado, Miramar, and Otay – alongside numerous regional and member agency facilities, all of which depend on precise pH adjustment and corrosion control. RDP Technologies designs lime slaking and feed systems engineered for the precision and reliability that high-volume Southern California municipal operations require year-round.
The Tekkem family of lime slakers for water treatment applies load cell technology to combine a measured weight of quicklime with a measured weight of water, holding the slaking reaction within the proven 180°F to 190°F temperature window. This weight-based control approach enables precision lime dosing systems with slurry concentration adjustable from one percent up to thirty percent based on plant requirements.
The same Tekkem platform converts to operate as a hydrated lime feed system without any physical modifications, providing flexibility as lime market conditions shift across Southern California. A continuous slurry delivery loop combined with pinch valve and flow meter dosing supports accurate feed at multiple application points within a facility. With only one moving part inside the reaction tank, maintenance demands stay infrequent and predictable for plants running around the clock through San Diego’s variable seasonal demand cycle.
Custom Engineering & Process Equipment Support Serving San Diego
Water and wastewater infrastructure across San Diego County has been continually upgraded to balance an arid climate, dense coastal development, and one of the most ambitious potable reuse programs in the nation. Treatment facilities must operate reliably through long dry seasons, periodic atmospheric river events, and the seismic considerations that come with serving a major Pacific coast region. RDP Technologies brings over 45 years of custom process equipment engineering experience to capital projects across San Diego County and surrounding service areas.
As a wastewater treatment equipment manufacturer that handles design, fabrication, and controls programming under one roof, we adapt to existing tankage, constrained urban site footprints, and operator workflows rather than forcing a generic package into a difficult location. Our intelligent control platforms integrate cleanly with SCADA systems and meet the detailed reporting expectations of California State Water Resources Control Board, San Diego Regional Water Quality Control Board, and EPA Region 9 oversight.
We engage directly with municipal engineers, consulting firms, and plant operations staff from early scoping through commissioning and long-term technical support. Robust equipment, dependable process performance, and practical technologies that simply perform are the principles that have guided every project we deliver. San Diego-area facilities benefit from working with a single accountable manufacturer that designs, builds, and stands behind the equipment for the long haul.
Biosolids Drying Systems for San Diego Wastewater Plants
With San Diego biosolids regularly hauled hundreds of miles to permitted disposal sites in Yuma County, Arizona, or Kern County, California, biosolids drying systems offer one of the strongest hauling-cost reduction cases of any major US metro region. The RDP-Fenton wastewater sludge dryer operates on a repeating batch cycle that allows drying time to be adjusted to match the natural variation in sludge cake solids concentration coming off the dewatering line.
Batch sludge drying equipment handles those upstream variations cleanly, whereas continuous-flow dryers often struggle when feed quality shifts unexpectedly. Operators in the field have repeatedly noted how little daily attention the system requires once a stable recipe is dialed in.
The dried product comes out significantly reduced in volume and weight, dramatically lowering trucking costs and opening pathways into fertilizer, soil amendment, and energy recovery markets across Southern California and the Southwest. Pairing the dryer with upstream RDP lime feed or storage equipment gives San Diego wastewater plants a fully integrated biosolids handling line backed by a single manufacturer with consistent controls and ongoing support. Long service life and ease of operation were the design priorities from the start, and that focus shows up clearly in real-world performance data from installed sites across the country.
Ready to Discuss Your San Diego Project?
Connect with the RDP Technologies team to scope lime feed, biosolids, or drying equipment for your San Diego-area facility. We’re ready to help.