Automating Management for a Vegetative Treatment System (VTS)
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1) The document describes two automated vegetative treatment systems (VTS) built in Nebraska to treat livestock wastewater runoff. 2) The systems use soil moisture and water level sensors connected to a human-machine interface to monitor conditions in the VTS and alert producers when action is needed. 3) Preliminary findings show the more advanced monitoring system was effective but costly, while a lower-cost alternative provided less detailed real-time data for management decisions.
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Automating Management for a Vegetative Treatment System (VTS)
- 1. Jason Gross Engineering Technician University of Nebraska Extension Automating Management for a Vegetative Treatment System
- 2. • Develop and demonstrate new alternative practices for un-regulated livestock producers though a small cost share program • Design and build projects on small and medium livestock operations under real world conditions. • Educate Producers and Consultants about using VTS LIVESTOCK PRODUCERS ENVIRONMENTAL ASSISTANCE PROJECT Nebraska Environmental Trust Fund NDEQ (EPA) 319 Non-Point Pollution Program Grant
- 3. Sprinkler Vegetative Treatment Systems (VTS) Advantages • They are flexible systems that can be economically designed to match desired application rates and soil infiltration rates • Feeding area is down gradient of the possible VTA location • Soil intake rate is too high for a flood application system (sandy / loess soils) or too low (very tight clay soils) • Topography challenges (rolling hills or short slopes) • Sensitive water table, low AWC of the soil, and many other reasons • Uniform application may be a critical design constraint • Limited space available.
- 4. Why Electric Controls and Sensors? • Proof of concept • Provide producer with feedback and information to make informed decisions so that they can prevent or minimize deep percolation risks. • For sensitive geologies or where there is concern about groundwater impact. • Automated recordkeeping • System 1 – Washington County Sprinkler VTS • System 2 – Nuckolls County Sprinkler VTS
- 5. System 1 - Washington County VTS • Feedlot • 4.3 acres of yard space • 580 head capacity • VTA • 8.8 acres of VTA with additional cropland surrounding • single phase pump system with self priming centrifugal pump • 3 sediment basins that drain to pump station • VTA constructed northeast of feedlot with a terrace deterring rain runoff from VTA • 80 pod K-line system on 4 risers • Variable Frequency Drive electric motor drive for an 80 series Gorman Rupp self priming pump (10 hp @ 440 gpm)
- 6. Feedlot Layout Basin 1 Basin 2 Basin 3 VTA Pipeline Pump Station Abandon Pen
- 7. Established Grass on VTA
- 9. K-Lines Applying Runoff Water
- 10. Pump, Motor, and Filter
- 11. Sensors and Controls for Human Machine Interface (HMI) with Simple Message System (SMS) • WatermarkTM 200SS-V soil moisture sensors at 4 locations at depths of 1 foot and 5 foot. • 2 SJ Rhombus water level indicators. • Davis Tipping Bucket Rain Gauge. • Touch screen PC based computer. • Wireless connection to HQ internet. • Variable Frequency Drive from Powercom
- 12. The Sprinkler “Talking VTS” Underground Sensors in VTA are wired to a HMI at Pump Station HMI uses SMS to Alert Producer of pump, basin, and VTA conditions HMI Float sensor Soil moisture
- 14. The Sprinkler “Talking VTS” Sensor installation 1 ft and 4-5 ft
- 20. Touch Screen HMI
- 24. System 2 – Nuckolls County VTS • 250 head cow / calf with farm • 250 head feedlot • Feedlot 1.5 acres • VTA 3.0 ac with 24 K-Line Pods • Single phase electric motor with Berkley B series end suction pump on a skid. • WatermarkTM 900M Data Collector with 200SS sensors • Sensors are at 1,3, and 5 foot depths in the VTA and a pasture.
- 25. System 2 – Nuckolls Sprinkler VTS
- 26. Pump with Dry Hydrant Suction Inlet
- 27. Pump, Motor, and Filter
- 28. WatermarkTM 900M Data Collector
- 29. 3.2” 1.05” 0.62”
- 31. What Did We Find Out? • The 2012 drought didn’t help. Did not receive much data without the rainfall. • We believe that the HMI unit at the Washington CO VTS can be useful for record keeping and operation in a 30” rainfall area but not for drier climates in western Nebraksa. • HMI - $4,500 for hardware and software development • 900M – Less than $1,000 • The Nuckolls County lower cost sensors worked well but with only instant read screen, there is not much information to make management decisions with extensive study.
Hinweis der Redaktion
- This vegetative treatment system consists of the existing and new pens, 3 sediment basins, pumping station, and a talking vegetative treatment area. Water collected in the sediment basins will be removed using the single phase powered pump and spread over the VTA using the K-line sprinkler system consisting of 4 lines with 10 pods per line. After each runoff event, the producer can engage the pump, which will apply runoff water from the feedlot onto the VTA until the basin is empty.
- This picture shows the layout of the entire vegetative treatment system on the Andreasen property. In this case, three sediment basins are used to collect runoff from the feedlot, which allows for removal of solids. The liquids from the two smaller basins are released into the largest basin and from there are pumped onto the vegetative treatment area, or VTA, by pumping to the 40 pod K-line sprinkler system. The red lines show the flow of the runoff water.