This document outlines the plan for the Northeast Integrated Barn Bio-Dome, a high-efficiency, closed-loop protein production system designed for year-round operation. This system combines aquaculture and poultry, integrating with the homestead's broader energy, waste, and food systems.
- Primary Goal: To produce fish and eggs, contributing to the homestead's food self-sufficiency as detailed in the food-production-plan.
- Core Principle: This system operates on a closed-loop model, utilizing on-site hydroponic grains for feed, and sending its waste streams to the central anaerobic digester for processing.
- Scale: 15 Egg-Laying Hens | 2,000 Gallon Tilapia Tank | 200 Fish Rotation
- Tank: 2,000-gallon insulated circular tank (12' diameter x 4' height). This size is sufficient to meet and exceed the annual fish production targets in the food-production-plan.
- Fish Species: Tilapia (Mozambique or Nile selected for heat tolerance and rapid growth).
- Aeration: A venturi injector on the pump return line will provide efficient, passive aeration.
- Filtration: A vortex settling filter will separate heavy solids, followed by a biological filter to process dissolved nutrients.
- Automation: A Variable Speed Pump (VSP) will be modulated by Dissolved Oxygen (DO), Ammonia (NH_3), and Turbidity sensors to ensure optimal water quality and energy efficiency.
- Coop: A mesh-bottom coop platform will be situated directly over the fish tank, allowing chicken manure to fall directly into the water, providing a nutrient source for algae growth, which in turn feeds the Tilapia.
- Lighting: LED supplemental lighting on a 14-hour cycle will be used to maintain egg production during the winter months.
- Diet: The hens' diet will consist of a 50/50 blend of hydroponic fodder (greens) and matured cull-grains (starch/energy) produced on-site, as part of the strategy to eliminate external feed costs.
- Heating: A closed-loop PEX heat exchanger embedded in the tank's foundation will be connected to the central heating-thermal-battery-plan to maintain optimal water temperature (76°F - 82°F) year-round.
- Air Quality: A Vertical Hydronic Recovery Stack (VHRS) module will be sized for 6 air changes per hour to manage ammonia and dander, providing fresh air while recovering heat. A dehumidifier will protect the building's structural integrity.
- Waste-to-Energy: Sludge from the vortex filter will be flushed weekly to the anaerobic digester, contributing to the homestead's biogas production.
| Input |
Source |
Output |
Destination |
| Grain/Fodder |
On-site Hydroponic Barn |
Eggs |
~75–90 Eggs/Week |
| Thermal Energy |
heating-thermal-battery-plan |
Fish |
~4–5 lbs Fillets/Week |
| Filtered Sludge |
Vortex Filter |
Biogas |
Auxiliary Heat/Power via Digester |
| Digestate |
Digester Output |
Fertilizer |
Hydroponics/Cows |
| Expense Category |
Daily Cost |
Notes |
| Livestock Feed |
$0.05 |
Mineral/Calcium supplements only. |
| Pump & Sensors |
$0.12 |
Modulated VSP for high efficiency. |
| Climate Control |
$0.45 |
Dehumidifier and VHRS operation. |
| Lighting |
$0.15 |
14-hour LED cycle for winter growth. |
| Waste/Heat Pumps |
$0.05 |
Circulator for thermal battery/digester. |
| Total Daily Cost |
$0.82 |
Total per week: $5.74 |
¶ 5. Maintenance & Harvesting
- Daily: Check sensor dashboard; collect eggs; harvest and plant fodder.
- Weekly: Selectively harvest 4–6 adult Tilapia; flush filter solids to the digester.
- Quarterly: Calibrate sensors; deep clean VHRS filters; check thermal battery fluids.
- Purging: Harvested fish will be moved to a separate clean-water purge tank for 48 hours before processing to ensure optimal flavor.
- Ventilation: The VHRS must be properly maintained to prevent ammonia buildup.
- Temperature: Water temperature must be kept between 76°F and 82°F for maximum biological efficiency and fish health.