Author Archives: Bob

SGEV Coil Digester project plan

General Plan: Build and test a prototype pilot-scale biogas digester. Features: Designed to digest starches and simple sugars as opposed to manure.  

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Pinch valve details

Pinch valve: Gear motor rotates lead screw, moving nut (and attached slide gate) up and down. Lowering the gate pinches 1″ I.D. Silicone rubber tubing shut. Raising it, opens the valve. The L298N H-bridge motor controller provides a simple inexpensive … Continue reading

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Protected: Biorealis/Thai Digester Project

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How to make ethanol

This video shows how to make 100% ethanol from sugar using a table-top electric distiller.  (Idea: I could measure the energy input using a kill-a-watt meter.).  It produces (using 4 distillation runs) ~92% ethanol, then shows 3 methods to get … Continue reading

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Arduino stepper motor controlled slurry pinch valve

Motorized Pinch Valve Some ideas for a motorized pinch valve using a geared stepper motor controlled by an arduino (for example. or PLR? or raspberry pi?). Need to design and print mounting brackets, gearing mechanism, linear actuator, etc. Design parts … Continue reading

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Arduino stepper motor controlled slurry pinch valve (Older)

Some ideas for a motorized pinch valve using a geared stepper motor controlled by an arduino. Need to design and print mounting brackets, gearing mechanism, linear actuator, etc. Design parts in (e.g.) Autodesk fusion 360, print on 3D printer. One … Continue reading

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Protected: Biorealis/KRAAFT Digester Project

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Serenity Gardens Eco-village Plot Plan

Here is a link to a plot plan (1 MB pdf) of Serenity Gardens Eco-Village. It was current as of November 2013. SGEV for FB

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SGEV Sinkhole – Water reservoir

Idea:  Explore feasibility of damming the gully below this sinkhole, and using the resulting lake or pond as a water reservoir. Potential advantages include: Positive way to control seasonal flows, site drainage and prevent further erosion damage. Working with the … Continue reading

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SGEV Gray water treatment

A good greywater recycling page — general info and links to other systems: http://greywateraction.org/content/about-greywater-reuse Another good graywater resource: http://www.greywater.net/ Artificial aquifer Tube Well: A way to filter pond or surface water: http://www.povertyenvironment.net/sites/default/files/pep-files/Artificial%20Aquifer%20Brochure.pdf Engineers without borders: A good page full of … Continue reading

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