NTMWD REGIONAL WASTEWATER SYSTEM

Transcription

1 Regional Service Through Unity Meeting our Region s Needs Today and Tomorrow NTMWD REGIONAL WASTEWATER SYSTEM Tour of South Mesquite Regional Wastewater Treatment Plant November 28, 2017

2 REGIONAL WASTEWATER TREATMENT PLANTS History Member Cities requested NTMWD take on regional wastewater service in early 1970s NTMWD assumed operation of South Mesquite Creek Wastewater Treatment Plant on Oct. 1, 1975 from City of Mesquite South Mesquite WWTP along with Rowlett Creek WWTP (which served City of Plano) became first plants of the NTMWD Regional Wastewater System Since 1975, the Floyd Branch WWTP and Wilson Creek WWTP have been added to the Regional Wastewater System Today, the NTMWD Regional Wastewater System provides service to 12 Wastewater Member Cities and 5 Customer Cities 2

3 CLICK TO EDIT MASTER TITLE STYLE SOUTH MESQUITE WASTEWATER TREATMENT PLANT MGD Treatment Capacity NTMWD takes over operation of Mesquite Wastewater Plant from City of Mesquite MGD Avg / 82.5 MGD Peak Treatment Capacity Significant regional growth over last 40+ years of operation Serves Mesquite, Forney, Rockwall & Heath Improvements Odor control Back-up power Converting from chlorine to UV disinfection Adding filtration capacity (41 MGD Average / Peak Treatment Capacity) 3

4 Interceptor System Overview Flows are conveyed from Cities to South Mesquite RWWTP through: City of Mesquite Interceptor Buffalo Creek Interceptor (Forney, Heath, and Rockwall) 75,300 ft gravity sewer, 30 MGD lift station, and 9,900 ft pressure sewer main Forney Interceptor (Forney) 6,697 ft gravity sewer, 10.8 MGD lift station, and 29,500 ft pressure sewer main Lower East Fork Interceptor (Mesquite and Seagoville) 26,110 ft gravity sewer, 16 MGD lift station, and 22,320 ft pressure sewer main Forney-Mustang Creek Interceptor (Forney) System of gravity sewers, force mains and increased capacity at Forney lift station 4

5 CITIES CONTRIBUTING TO SOUTH MESQUITE FLOWS City of Mesquite 65% City of Forney 13% City of Rockwall 11% City of Heath 6% City of Seagoville 5% 5

6 Wastewater Treatment Process Screening Primary Clarification Aeration Basin Secondary Clarifier Filters Chorine Contact Basin Bar Screens Solids Processing NTMWD Clean Effluent To Receiving Stream Mesquite Creek To Landfill NTMWD 6

7 SOUTH MESQUITE PLANT PROCESS LAYOUT 7

8 CLICK TO EDIT MASTER TITLE STYLE PUBLIC EDUCATION CAMPAIGN: DEFEND YOUR DRAINS Working with cities to encourage residents to properly dispose items that can damage: Plumbing systems Wastewater pipes and facilities Water quality Wipes or other items may be labeled flushable but don t biodegrade Can clog pipes and cause sewer overflows into area waterways Keep these out of your drains: Medications Paints, chemicals, pesticides Large amounts of cleaning products Fats, oils and greases Partnership with NCTCOG: DefendYourDrainsNorthTexas.com Cease the Grease Holiday Grease Roundup Nov. 27 Jan. 8 Collection Center at NTMWD Environmental Services Bldg. 8

9 ODOR CONTROL Wastewater Treatment Primary Goals 1. Protect public health 2. Protect environment 3. Enable economic development 4. Be a good neighbor Made significant investments to minimize and offset impacts from odor and waste Foul air collected from main areas of the plant and conveyed to odor control units Chemical scrubbers and filters are used to treat the air before it is released Liquid waste is discharged into plant drain system Odor-control improvements have been very effective 9

10 CAPITAL IMPROVEMENT PROJECTS 2008: Rehabilitation of primary clarifier 3 & 4, addition of odor control covers, and new primary sludge pump station 2013: Expansion from 25 to 33 MGD 2014: Solids Bldg. Odor Control Improvements 2014: Upgrade of 5KV electrical power system & secondary power source 2015: Construction of new Operations Bldg. 2016: Conversion of Aeration Basins 1,2,3,4,5 & 6 to BNR and blowers replacement Under Construction: Replacement of existing chlorine gas process to UV and outdated filters with disk filters Future Projects: Complete fiber optics ring and SCADA improvements Expansion to 41 MGD Average and MGD Peak Flow Capacity 10

11 WASTEWATER SYSTEM IMPROVEMENTS Sabine Creek WWTP Expansion from 1.5 MGD to 3.0 MGD average daily flow Located in Royse City serves Royse City & Fate Anticipated Final Completion June 2018 Cost = $9.2 million South Mesquite WWTP Filter and UV improvements Located in Mesquite serves Forney, Heath, Mesquite, Rockwall & Seagoville Anticipated Final Completion January 2019 Cost = $10 million Buffalo Creek Interceptor Parallel WW Line Installing wastewater line to parallel 43,000 feet of existing line to convey flows from Rockwall, Heath, Forney to South Mesquite plant Currently in design; Construction starts in Dec Cost = $12 million 11

12 South Mesquite RWWTP Site Plan 1. Administration Bldg Headwork 3. Primary Clarifiers 5 4. Aeration Basins 5. Secondary Clarifier 6. Solids Bldg Disk Filters 8. Chlorine Contact Basins