Scaling Up Black Soldier Fly Food Scrap Processing | Phase IIby Terry Green on 11/17/12
In Phase I we described the layout and initial construction of our site for scaling up propagation of larvae used in processing and recycling food scrap aimed at building a commercially viable business in working with Black Soldier fly (BSF) biotechnologies. Our processing shed has a footprint 10x24 ft, stands approximately 10 ft high on its North side, which slopes South to the opposite wall, which is approximately 8 ft in height. The walls and rafters were all built with 2x6 studs. Walls and spaces between the rafters excluding skylights are insulated with R-30 fiberglass. R-19 insulation was installed beneath the subfloor. Figures 1 and 2 show the general framing and cladding of the shed as it took shape. Windows used in the shed are vinyl clad, double-paned and insulated, and equipped with screens to provide a means for ventilating and cooling the shed during the warmer summer months.
Fig. 1. Scott Olsen (left) of New Earth Farm and Terry Green (right) of DipTerra work on the North side of the BSF shed installing ¾” OSB sheathing over the 2x6 shed frame. Windows on the walls and in the roof are framed and ready for installation.
Fig. 2. Northwest view of the Black Soldier fly shed showing exterior ¾” 4x8 RTD cladding nailed in place on top of installed OSB and 15 lb felt liner going up over walls of the shed. Note drip flashing strips were installed over the top edge of the 8 ft high RTD panels in preparation for the next layer of exterior siding to be brought up to the roof line of the shed.
The shed was largely built from recycled building materials. This includes insulation, double doors built into the East wall, skylights, windows on the South side, and flashing installed on the exterior walls and around the roof and skylights. Corrugated polycarbonate shields crafted from recycled metal plates and hangers were anchored over each of the window skylights (Fig. 3) to prevent rain water from pooling inside the window wells. Because of the shallow pitch of the roof, we used roll roofing.
Fig. 3. View of recycled vinyl clad double pane windows installed in Black Soldier fly roof with fabricated polycarbonate shields anchored over each window for extra protection against the elements and to eliminate pooling of rain water in the window wells.
Figs. 4 and 5 provide an interior view of the shed showing R-30 fiberglass insulation going up inside the walls and roof of the shed, and installation of interior paneling in closing off the interior walls in readying the shed for operation.
Fig. 4. Interior view of Black Soldier fly shed viewed through door entry showing South (left) and West (end) walls with R-30 insulation loaded between the 2x6 studs ready for closure with paneling.
Fig. 5. View of South (left) and West (end) interior walls of the Black Soldier fly shed following installation of interior paneling. Note natural light flowing through the skylights and windows provides for optimal breeding of flies inside the shed year round.
More to come soon - watch for our next blog on our processing shed.
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