The work consists of providing the necessary labor, materials, equipment, supervision, and plant to construct the Wastewater Treatment Plant Expansion to 1.85 MGD for the Northampton Municipal Utility District in Harris County, Texas. The work includes rehabilitation, improvements, expansion, and construction at the two facilities that comprise the wastewater treatment plant (WWTP).
WWTP No. 1: The work at WWTP No. 1 includes, but is not limited to: expansion of Lift Station No. 2 to increase the firm pumping capacity of the two lift stations to 5,139 gpm peak two hour flow; expansion of the headworks to increase the treatment capacity to 5,139 gpm peak two hour flow; rehabilitation of the existing aeration diffuser systems; replacement of the clarifier mechanism at Clarifier No. 1; rehabilitation of Scum Pump Station No. 1; construction of submersible RAS/WAS Pump Station No. 1 with chopper pumps; construction of grating at the Clarifier No. 2 launder trough box; rehabilitation of Scum Pump Station No. 2; pump replacement and rehabilitation of RAS/WAS Pump Station No. 2; rehabilitation of the chlorine contact basin and effluent pump station; rehabilitation of the sludge holding tanks including modifications to the existing decant mechanism; improvements to the existing chemical system including expansion of the sodium bisulfite chemical system to treat up to 5,139 gpm peak two hour flow and ventilation improvements for the storage and feed room; construction of a dechlorination basin with a submersible mixer; replacement of the blowers with four centrifugal blowers, elevated three feet above the 0.2% annual chance floodplain; rehabilitation of the control building; modifications to existing yard piping, including construction of a new outfall and sampling location; protective coatings; and all associated power, instrumentation, plant PLC monitoring, controls, and programming. This project also includes the installation and field testing of a 600kW diesel generator elevated three feet above the current 0.2% annual chance floodplain.
WWTP No. 2: The work at WWTP No. 2 includes, but is not limited to: improvements and expansion of the influent basins; construction of an aeration basin to increase the aeration treatment capacity of WWTP No. 2 to 0.90 MGD ADF; rehabilitation and improvements for the existing aeration basin; construction of a 45-foot diameter spiral blade secondary clarifier and submersible scum pump station with chopper pumps to increase the clarifier treatment capacity of WWTP No. 2 to 2,500 gpm peak two hour flow; rehabilitation of the existing secondary clarifier and scum pump station; construction of a chlorine contact basin to increase the disinfection treatment capacity of WWTP No. 2 to 2,500 gpm peak two hour flow; rehabilitation and improvements for the existing chlorine contact basin; replacement of the post-aeration system; improvements to the flow measurement channel to increase flow measurement capacity; construction of two digesters to increase the treatment capacity of WWTP No. 2 to 0.90 MGD ADF; rehabilitation to improvements for the existing digesters, including modifications to the existing decant mechanism and flow metering systems; replacement of the three positive displacement blowers, elevated three feet above the 0.2% annual chance floodplain, to increase the air delivery required by the expanded facility; replacement of the sodium hypochlorite chemical system to treat up to 2,500 gpm peak two hour flow; construction of a non-potable water pump station with self-priming pumps; rehabilitation and improvements to the existing 500 kW diesel generator; modifications to existing yard piping; protective coatings; and all associated power, instrumentation, plant PLC monitoring, controls, and programming. This project also includes modifications to floodproof the existing controls building.
