Sketches/Updated Bill of Materials

Drip Irrigation System (Holding) Front View

The holding tank sits on an elevated surface and the drip irrigation tubing is suspended over the biobed so that the rinsate flows from the holding tank into the biobed. Calculations are conducted to determine the required elevation of the holding tank to create the necessary pressure for an even flow through the drip irrigation tubing. 

Drainage System Front View

A clay layer is placed at the bottom of the aquarium to ensure that the drainage system aligns with the elevation of the fitted plug, which is inserted into a drilled hole in the glass. A 1/2-inch PVC pipe, perforated with holes on all sides, allows water to seep in efficiently. To prevent sediment infiltration, all pipes will be wrapped in a nonwoven geotextile fabric (sediment sock). The treated rinsate will drain into the central PVC pipe and exit through a 3/4-inch outlet plug. 

Drainage System Top View

Two PVC pipes are positioned on either side of the central pipe, all connected by a PVC cross tee. The drainage system is enclosed in pea gravel, which is separated from the biomixture above by a layer of nonwoven geotextile fabric to prevent mixing while maintaining proper drainage. 

Updated Bill of Materials

Since the initial round of purchasing, several adjustments have been made to the prototype. After evaluating the smart valve and holding tank, additional components were identified as necessary to ensure proper connections. Additionally, the incorporation of a drainage system at the base of each biobed has further expanded the bill of materials.