Containment Challenges & Engineering Solutions for Low Containment. National Centers for Animal Health Ames, Iowa Dennis Jones, Facility Engineer
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1 Containment Challenges & Engineering Solutions for Low Containment National Centers for Animal Health Ames, Iowa Dennis Jones, Facility Engineer 1
2 NCAH Missions Conduct basic and applied research on selected diseases of economic importance to the U.S. livestock and poultry industries (ARS National Animal Disease Center). Diagnostic testing, training, reference assistance, and production of reagents. To protect the health of animals (APHIS National Veterinary Service Laboratories). Ensure that veterinary biologics available for the diagnosis, prevention, and treatment of animal diseases are pure, safe, potent, and effective (APHIS Center for Veterinary Biologics). 2
3 NCAH Site Ames, Iowa acre combined site buildings - BSL-2 & BSL-3 Laboratories - BSL-2 Large Animal Facility - BSL-3Ag Large Animal Bldg - Adm & Support Facilities - Central Utility Plant - Wastewater Pre-treatment Plant - Field barns & pastures BSL-2 Large Animal Bldg 3
4 BSL-2 Large Animal Bldg 4
5 Features: - 103K gsf - Group housing rms - 5 isolated suites w/ various rm sizes & # - Each suite w/change & shower, feed, work rooms. - Each animal room has entry vestibule - Painted steel animal penwork (semi-flexible) - Manure to be washed down or scraped up 5
6 Features: - Wastewater collection tank room for chemical pre-treatment - Wastewater pumped to heat pre-treatment plant - Steam & Chilled water supplied from Utility Plant - HVAC provides directional air flow into animal rooms - Fixed Ventilation (12 cph) - Zone temperature control - Animal rooms have hoisting hooks in ceiling for carcass handling - Building corridors are connected to necropsy/incinerator facility 6
7 Budget Challenges $$ Animal Care & Space Requirements HVAC System Requirements Flooring & Wall surfaces Waste Management # Animal Rooms Penwork 7
8 Budget Solutions (Cuts to meet the budget $$) Cut the building size in ½ and continue to use 2 existing animal buildings Accept fixed ventilation rates Accept zone temperature control Accept limited humidity control Accept sealed concrete vs high-quality floor finish 8
9 Engineering Solutions Sealed floors can be updated with high-quality finish in the future Pre-cast concrete & masonry walls & ceiling construction provided cost savings Painted animal penwork can be replaced with better quality in future (also will know what works) Wastewater chemical pre-treatment & pumping systems can be automated in future Large penthouse constructed on top of pre-cast structure provides space to add additional reheat coils and gain individual room temperature & humidity control 9
10 Operational Challenges Waste Management in Animal Rooms Conventional floor drains with solids baskets Manure scraping does not happen All wastes are flushed down the drains Wastewater system limits roughage in feed Caretaker Comfort in the building Temperatures dictated by caretaker comfort Design assumed warmer temperatures Cooler temperatures raise the indoor humidity 10
11 Engineering Questions Directional Air Flow - 4 x7 walk doors cfm leakage - No door interlocks - Sliding feed room door - Feed room does not have an airlock. When corridor door is open Rm air pressure = outside air pressure 11
12 Engineering Questions Directional Air Flow - Designer set-up - Air flow from Animal Room Corridor to Suite Workroom & Dressing Rooms? - Exposed HVAC ductwork in change rooms get adjusted! 12
13 Unresolved Issue Waste Management Floor Drains - Manure clogs filter basket - Caretakers remove basket & wash manure (+) down the drain vs. scraping up solids REMOVABLE FILTER BASKET LADDER GRATE 13
14 Future Engineering Changes HVAC Systems - Add floor drains in the penthouse - Add RH coils - BAS controls - Add SA & EA control valves - Change SA & EA fan speed control from flow control to SP control (already done). 14
15 Future Engineering Changes Waste Management Piping Bends Change piping bends to radius that can be cleaned with jetting tool Need dble 45 O elbows or sweep bends 15
16 Future Engineering Changes Waste Management Collect Tank Water hose set on timer to operate 5am-11am (Room washdown) - Change wastewater collection tank configuration - Requires additional water to keep from clogging - No real water savings (as est by designer). 16
17 Future Engineering Changes Waste Management Pump Piping Waste transfer pump piping configuration packs solids into piping. Temporary relief by cycling between lead/lag/standby pumps daily. Will reconfigure piping with Y- Joints. 17
18 Thank you. Overall Good Facility Provides capability to improve Similar problems to other facilities 18
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