Batch MiniBIO2

8/2/2019 Batch MiniBIO2

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batch mini-processor

For one or two litres

This mini-processor is easy to make from not very much, mostly kichen stuff and a coupleof tools. It's effective and safe, closed and virtually air-tight, with no splashing or leaking ofhot fumes. It will make one- or two-litre batches for test-batch or demonstration purposes,suitable for single-stage or two-stage processes, with full agitation and temperaturecontrol. And you can take it anywhere.

There's no need to follow this prescription exactly -- use what's to hand, improvise. For instance, if

you don't have a plastic drill-grip that will fit a plug spanner to use for the drill-stand as described

below, we made a second stand using a piece of angle iron and a strip of 3/32" steel half an inch wide

bent to fit round the drill and clamped in place with bolts. If you don't have a welder or can't make a

steel stand, make a stand out of bits of wood bolted together and grip the drill in a portable vice

clamped to the vertical. Or something. A crock-pot might do instead of a spaghetti cooker and a

portable gas ring. Our gas ring died so now we use a hot-plate instead. You might find a way of using

a sealed bearing in the lid rather than a wooden bush. And so on. Let us know!


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Materials


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Three-litre HDPE container with two lids;

Spaghetti-cooker -- the bottom and sides of the inner pot are full of holes like a

collander;

Electric drill;

Plastic grip for drill;

Stand for the drill; Sparkplug spanner;

Stirrer;

Portable gas cooker (canned gas) or electric hot-plate;

Two half-litre PET bottles.

Cost -- in our case, zero: this was all discarded junk, including the drill, and all in perfect workingorder.

The drill stand is rigged from scrap angle iron and welded together, but it could just as easily be

bolted. The bit that holds the drill consists of the tough plastic grip that came with the drill, a plug

spanner, which conveniently fits inside the grip, held in place by two bolts (extra holes mean you can

move the drill in and out from the stand), and the plug spanner is welded to an extra bit of angle iron

bolted inside the vertical section, again with extra holes above and below for adjustment.

The stirrer is a length of 6mm steel rod

with a slot cut in the end and a piece of

flat steel brazed into the slot, cut to size so

it fits through the larger of the two HDPE

container lids.


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The lid is fitted with a wooden bush cut

from hardwood with a 6mm hole drilled

through it to take the stirrer shaft. Make

it a tight-fitting hole, then heat a piece

of the same steel rod as the stirrer and

push it carefully through the hole -- nottoo hot, just enough to scorch the

surface of the wood inside the hole, not

char it. Add a few drops of biodiesel for

lubrication.

Cut a square hole in the lid the exact size and shape of the bush; cut another hole in the lid insert. Saw

two shallow grooves on all four side of the bush, immediately above and below where it will fit the

lid. Push the bush into the hole in the lid; push the insert into the lid around the bush. Secure with

epoxy resin -- push the resin firmly into the grooves to hold the bush in position. Some silicon round

the seams helps.

Heat up the oil in a saucepan on the gas cooker and pour it into the mini-processor.

Slide the business end of the stirrer inside the processor and slide the bush in the lid over the other

end; screw the lid on firmly. Fill the two half-litre PET bottles with water at or above the processing

temperature. Put the processor into the spaghetti cooker; wedge in position with a PET bottle on either

side. Add hot water to the cooker to just below the height of the oil -- as much water as it will take

before the processor begins to float. Use the gas flame to adjust the water temperature to the

processing temperature, then turn off the gas.

Attach the drill to the stand, tighten the stirrer in the chuck, switch on and start stirring.

Adding the methoxide

SeeMethoxide the easy way.

We mix methoxide for test batches in HDPE

chemical bottles, which have a strong lid and a bung.

Drill two holes in a lid and fit two short sections of

plastic or 1/8" (4mm) copper piping, fix on both

sides with strong epoxy resin. To one, on the inside,fix a length of rigid 1/4 (6mm) plastic tubing that

will reach almost to the bottom of the bottle. To the

other, on the outside, fit a length of flexible 1/4

plastic tubing. Fit a third section of copper piping to

the small lid of the processor.

To add the methoxide, remove the lid and bung from

the bottle of pre-mixed (cool) methoxide and screw

on the transfer lid tightly.

Fit the other end of

the length of flexible
http://journeytoforever.org/biodiesel_aleksnew.html#easymethhttp://journeytoforever.org/biodiesel_aleksnew.html#easymethhttp://journeytoforever.org/biodiesel_aleksnew.html#easymeth


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1/4 plastic tubing to

the inlet pipe in the

small lid of the

processor. Now,

carefully, lift the

methoxide bottleabove the processor

and turn it upside

down. Air goes into

the open pipe to the

bottom (now the top)

of the bottle,

methoxide drains out

of the second pipe

through the

processor lid into the

oil to be mixed.

When all the

methoxide has

drained, turn the

bottle right way up

and put it down on

the table beside the

processor. Any stray

methanol fumes that

don't condense inside

the processor will

vent into the

methoxide bottle and

condense there.

Monitor the

temperature with a

thermometer,

turning on the heatwhen necessary --

this is quite safe,

even with gas, as is

running the drill

motor, as no

methanol fumes

escape during

processing. The

temperature only

needs adjustment

twice in an hour atnormal room

The HDPE container is

translucent rather than fully

transparent but it's clear

enough to see the reactiongoing on inside, and the

changing colour and

viscosity of the oil.


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temperature.

When the process is finished, disconnect the drill, remove the container and stand it on its side to

settle, small lid down; later, to drain off the by-product, simply tip it up, hold it over a container and

loosen the small lid, tightening again when you hit the yellow biodiesel.

Biodiesel processorsHazards

Test-batch mini-processor

Simple 5-gallon processorJourney to Forever 90-litre processor

The 'Deepthort 100B' Batch Reactor

Ian's vacuum biodiesel processor

Chuck Ranum's biodiesel processor

Micro-Production System for Biodiesel

833 Gallon Per Day Batch Plant

K.I.S.S. processor

Pelly "Model A" processor

Luc's processor-in-a-cabinet

"Foolproof" method processors

The touchless processorContinuous reactors

How to make a cone-bottomed processor

Biodiesel technology

Biofuels at Journey to Forever

BiofuelsBiofuels Library

Biofuels supplies and suppliers

Biodiesel

Make your own biodiesel

Mike Pelly's recipe

Two-stage biodiesel process

FOOLPROOF biodiesel process

Biodiesel processors

Biodiesel in Hong Kong

Nitrogen Oxide emissions

Glycerine

Biodiesel resources on the Web

Do diesels have a future?Vegetable oil yields and characteristics
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Bubble washing

Biodiesel and your vehicle

Food or fuel?

Straight vegetable oil as diesel fuel

EthanolEthanol resources on the Web

Is ethanol energy-efficient?

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Batch MiniBIO2