rural water services conference
DESCRIPTION
Rural Water Services Conference. 13 th September 2006 Cavan Crystal Hotel, Cavan. Single House Treatment Systems. Matt Shortt Director of Services North Tipperary County Council. Introduction. Issues for the provision of wastewater facilities for small rural communities - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/1.jpg)
13th September 2006Cavan Crystal Hotel, Cavan
Rural Water Services Conference
![Page 2: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/2.jpg)
Single House Treatment Systems
Matt ShorttDirector of Services
North Tipperary County Council
![Page 3: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/3.jpg)
Introduction
1. Issues for the provision of wastewater facilities for small rural communities
2. Seven Villages Pilot Project
3. STEDS Pilot Project
![Page 4: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/4.jpg)
Single Rural Dwellings
Settlement Plans
Package Plants
Maintenance Contracts
![Page 5: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/5.jpg)
Settlement Plans
![Page 6: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/6.jpg)
Issues
Capital Cost/Unit Cost
Annual Operating Cost
Community support
Appropriate Treatment
Future growth
![Page 7: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/7.jpg)
Issues contd.
DesignReceiving waters/groundUnderloadingFuture growth prediction
CapitalSewers/NetworkPlant
Operation SludgeGrit/screeningsFats Oils and GreasesUser behaviour
![Page 8: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/8.jpg)
Minimise cost (capital and operating)Facilitate innovation based on proven technologyScaleRuralProximityGeographical SpreadInclude networkRange of ground conditions and discharges pointsOther services
7 Villages Pilot - Objectives
![Page 9: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/9.jpg)
7 villages - DBO
![Page 10: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/10.jpg)
Requirements
Construction of new wastewater collection network in 7 villages
Connection of wastewater collection network to individual septic tanks / waste pipes
Construction of 7 new small scale wastewater treatment works and outfall pipelines
Operation and maintenance of wastewater collection networks and treatment plants for a period of 20 years following completion
Compliance with requirements of sludge management plans
![Page 11: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/11.jpg)
Successful Tender
5 No. Gravity Collection Systems, 2 No. Vacuum Systems.
Concrete cast in-situ conventional Activated Sludge Plant at all 7 Villages (Concentric).
Screening and Compaction at all 7 Sites.
Sludge Holding Tank at all Sites.
Generator at all 7 WWTW’s.
2 No. Administration Buildings
Standard Landscape details.
![Page 12: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/12.jpg)
Contd.
Costs include O+M of sewers and treatment plant.
Fixed and variable payments.
Variable payments dependent on load.
Capital replacement fund to ensure values of asset maintained.
Rate provided for future connections.
Sludge Storage and Transfer included.
![Page 13: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/13.jpg)
![Page 14: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/14.jpg)
Unit Costs
Village Existing Equiv No
Connections Unit cost
Upperchurch 45 €25,093
Loughmore 48 €22,557
Clonmore 45 €31,739
Terryglass 80 €20,277
Clonoulty 60 €25,705
Hollyford 65 €23,725
Cullen 45 €22,973
Average €24,176
O/heads €4,715
Total €28,891
![Page 15: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/15.jpg)
Is the technology appropriate?
By how much will the unit costs reduce?
What is an economic cost?
How will it be funded (Developer + DEHLG + LA)?
Will development follow?
Questions
![Page 16: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/16.jpg)
“Sustainable Technologies for Small Wastewater Treatment Works”
![Page 17: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/17.jpg)
WRc Collaborative ProjectWater Research Centre
Search for and review alternative technologies
Sustainability Maintenance Risk of failure Process performance Low energy costs Low operating costs Renewable energy options
![Page 18: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/18.jpg)
Approach
Literature search
Short list
Real life applications
Evaluate whole life costs
![Page 19: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/19.jpg)
Alternative collection systems
Vacuum
Pressure
Gravity
![Page 20: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/20.jpg)
Alternative treatment systems
Lagoons or ponds
Biological filtration systems
Mechanical systems
Combinations of each
![Page 21: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/21.jpg)
Septic Tank Effluent Drainage System
STEDS
![Page 22: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/22.jpg)
Effluent vs Gravity Sewer
![Page 23: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/23.jpg)
Two Possibilities
Septic Tank Effluent PumpingSeptic Tank Effluent Gravity
![Page 24: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/24.jpg)
Primary treatment in interceptor tanks
1000- or 1500-gallon tank per residence
70% removal of fats, oils, and greases
24-hour emergency storage
12-year pumpout with 95% confidence
Abuses stay in interceptor tank
Chemical sources easier to identify
Effluent Sewer ComponentsFiberglass Reinforced Tanks
![Page 25: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/25.jpg)
Pump vault
High-head effluent pump
Filter cartridge
Float assembly
Discharge assembly
Splice box
Components, cont.
![Page 26: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/26.jpg)
Collection System
Shallow burial depth
Laid to contour of land
No minimum velocities
No oversized designs
Low operation and maintenance costs
Odour control necessary in certain applications
![Page 27: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/27.jpg)
Secondary Treatment
Packed Bed Filter - Attached Growth Process
Highly stable, reliable
Uses fixed film media
Operates in an unsaturated condition (not submerged)
Employs intermittent dosing
Uses filtration and biological/chemical reduction
![Page 28: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/28.jpg)
Secondary Treatment
Packed bed filter
Engineered textile material
Appropriate tankage and timed dosing
Complete, premanufactured package
![Page 29: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/29.jpg)
![Page 30: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/30.jpg)
![Page 31: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/31.jpg)
Flexible in design Adaptable to varying site conditions Allows for phased buildout Can be integrated into existing sewer
infrastructure
Design includes storage/reserve in the event of power
outages or need to repair mainline break
Low-impact construction Minimal disruption to community
Advantages
![Page 32: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/32.jpg)
Advantages
Cost-effectiveness
Low initial costs
No manholes
No pumping stations
Low operating costs
Low maintenance costs
Low and gradual repair/replacement costs
![Page 33: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/33.jpg)
Benefits
Allows the construction of houses in areas where standard sewers or septic systems can’t be used
Has affordable installation costs and low maintenance costs
Has little visual impact
![Page 34: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/34.jpg)
![Page 35: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/35.jpg)
![Page 36: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/36.jpg)
Householders Play an Important Role
![Page 37: Rural Water Services Conference](https://reader036.vdocuments.site/reader036/viewer/2022062516/56812ad4550346895d8eb575/html5/thumbnails/37.jpg)
13th September 2006Cavan Crystal Hotel, Cavan
Rural Water Services Conference