Medium-Scale Wastewater Container Design

I need a complete process design for a containerised wastewater-treatment unit that can reliably handle between 1 000 and 10 000 L per day. The end use is not drinking water, so every decision must focus... (Budget: $250 - $750 USD, Jobs: 2D Drafting, 3D Design, AutoCAD, CAD/CAM, Chemical Engineering, Engineering Drawing, Mechanical Engineering, Solidworks)