Water Treatment Plant Replacement

The City of Nevada’s Reverse Osmosis (RO) type water treatment facility is nearly 40 years old. A recent Facility Overview and Condition Assessment report recommended many upgrades and improvements to the existing facility. The original RO process contains a single skid of membranes which doesn’t provide treatment redundancy during maintenance or cleaning operations. Additionally, the chemical storage and feed systems, degasification and scrubber system, and electrical and control systems are outdated. These systems are currently being operated and repaired with equipment that has been discontinued and difficult to source.

Allgeier Martin was retained to assemble a preliminary engineering report and design upgrades and improvements to the City’s water treatment facility. The design improvements will consist of replacing the existing RO feed skid with two new 100% design capacity three stage RO skids. The maximum capacity of the new facility will be 3.2 MGD. The outdated and undersized sodium hydroxide and sulfuric acid storage and feed systems will be replaced with systems meeting current building codes and sized appropriately. Conversion from a gas chlorine feed system to a liquid sodium hypochlorite system will be evaluated and ultimately a new chlorine feed system will be designed. A new degasifier system (induced draft multi-tray type) will be designed for removal of hydrogen sulfide. Due to the facilities’ location within the community, a dry media adsorption scrubber system containing two carbon media vessels and associated equipment will be included to remove nuisance odors. Lastly, the WTPs electrical system and controls will be completely removed and upgraded to provide plant operators with real-time data and state of the art controls.