Hey Charlie,

thanks for your post and that all looks really cool! Do keep us up to date with progress and keep the pics coming always really nice to see people getting involved and making a difference!

Best wishes,

Eric

Hi Ariel,

you can’t be a 100% certain, as a lot will depend on ambient temperatures, but chances are very high of all your work being for nothing with coffee a week old. You basically miss the window where the coffee is semi sterile because of the brewing process.

Good luck growing!

Eric

Hi Balan,

thanks for your question and I hope we haven’t confused many people out there with the different forms of  lime! We’ll soon have  a pdf ready with our best current mix.

In the meantime: we don’t actually add the builders lime to the coffee. When we add straw (not strictly required but great enhancement) we soak the straw overnight in a lime bath and then leave it to drain for a  while. The lime needed for the lime bath pasteurisation is Hydrated Lime – which is sometimes also called Builders Lime. It usually has less than 10% magnesium content (which is good), but worth checking this with the supplier if possible.

I trust that helps but if any questions please do let me know.

Best wishes,

Eric

Hi Vanilyn,

welcome to the course and thanks for pointing this out. Joseph contacted us via email as well and we replied as per below:

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Best wishes,

Sarah

Hi Iain,

Good question – we investigated this quite a bit last year. It is possible to make biofuel briquettes from the spent grounds but you need an expensive briquetting/pelletising machine which forms the briquettes or pellets at high temperature and pressure. There is a company in London who have just started doing this on an industrial scale: http://www.bio-bean.com/products/

On a smaller scale, you can make individual coffee logs at home by mixing the dried grounds with another form of fuel such as wax and sugar, in a similar style to this: http://www.instructables.com/id/How-to-make-a-FireLog/

Hope this helps,

Eric

• This reply was modified 10 years, 1 month ago by Eric Jong.

Dear Jan,welcome to the course. The info will be there for you to access when and where you want and this is on a lifetime basis.

Enjoy and let us know how you get on.

Best Wishes,

Eric

Hi Bex,

we have no direct experience with coir or paper pellets. It should work as I have heard of coir being used. We have had some success growing on paper hand towels and that was fun to see work.

Let us know how you get on!

Best wishes,

Eric