Energy Matters Forums

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Questions for Jeff!!


Your current biogas system uses out of date drinks. Presumably you have a deal with a supplier to provide these. In an environment where such a resource is not available as a pre-sorted commodity, how would the system work?

For example, I live near a small town in a rural area. The town has a rubbish collection service, I'm not sure how much "sorting" the residents are expected to carry out to divide their rubbish - as we are out of town we are left to deal with our own rubbish (our food waste is used to create pork, eggs and vegies via compost!). I do know that the local "tip" takes organic rubbish and processes it for mulch (free to anybody with a trailer!).

If such a town were to consider BioGas, what would be required?

I'm also interested in your earlier comment about "wood" not being usable because of its lignin content. At what point does a plant become "wood"? I only ask because I've just spent the morning finishing sowing a paddock of summer forage, and the stubble from last year is still thick. It is not technically "wood", being the thick stems at the base of a millet plant, but like straw it is brown, hard and brittle, thus classified as "woody"! Which from my point of view means two things, firstly it break down into humus (green material does not, it tends to simply "vanish") and secondly it breaks down very slowly in a hot dry environment. So it would be interesting to know whether stubble and straw are too "woody" or could be used to generate biogas and then returned as by product to the paddock.

Lastly (For now!) I believe you also mentioned biogas for use as transport fuel. Presumably this requires the biogas to be compressed and stored.... any further details on this?

[Tracker]

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Your questions seem a bit lonely, here by themselves... !

Your current biogas system uses out of date drinks.

This comment caught my interest, as I instantly wondered "What drinks could be used to produce Bio-Gas"

Sugary soft drinks might be fermented, if any presevatives could be overcome.
Alcoholic drinks would not need distilling, but both would need lots of energy in order to distill to ethanol..

Where has 'Jeff' outlined what he is doing ?
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[zzsstt]

Where has 'Jeff' outlined what he is doing ?
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In the NSW Gross FIT debate thread (or one of them!) http://forums.energymatters.com.au/solar-wind-rebates/topic1852-80.html. I'd forgotten I'd posted this, and I guess Jeff hasn't noticed it. I must remind him!