This magic stuff is the best around for picking up your garden condition and will put a smile on your face.The DIY product will last your garden a lifetime. These how to videos will tell you all to know about how to do the easy process at home
View & study all the biochar videos below from various publishers & choose which method will work for you.Maybe a combo could work better for you
“It takes sawdust, burns that nice and cleanly, and then at the same time takes a little more sawdust and pyrolyses that to produce biochar,” he said.
Nothing goes to waste. The excess heat will be used to dry wood for the timber mill and the business will soon sell not just biochar but carbon credits too.
“So the trees capture the carbon, the pyrolysis stabilises it, and then the use of the biochar stores it, and if you can get those three things – capture, stabilise and store – then you’ve got one of the solutions to climate change,” Ms Giudici said.
Biochar is a type of charcoal, although it is a bit different to what you throw on the barbecue.
Organic material is ‘cooked’ in a process called pyrolysis, which uses high temperatures and low oxygen levels to create charcoal with a very stable carbon structure.
A charcoal-like product produced by the pyrolysis of biomass, biochar is composed largely of carbon. Pyrolysis is a thermochemical conversion process in which biomass is heated at high temperature (usually 450°-750°C) in the absence of oxygen to produce energy products, of which biochar is one (the others being bio-oil and syngas). Biochar retains the original structure of the feedstock but has an increase in porosity.
Biochar use dates back centuries when it was used to enrich Amazonian soils. More about the history of biochar and charcoal use in soils can be found in the webinar “Biochar: The science behind the hype” presented by USDA-ARS Soil Scientist Kurt Spokas.
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Is black the new green?
There is no doubt biochar production captures and stores carbon. There is also plenty of evidence it’s good for your soil.
But it’s not a silver bullet technology.
Professor Mark Howden is the Director of the ANU Institute for Climate, Energy and Disaster Solutions.
He believes the potential of biochar is huge but warns it is not a panacea for our climate woes.
“It’s only part of a set of solutions for climate change, and it’s only part of a set of solutions for sustainable agriculture,” Professor Howden said.
“I think there is a lot of very positive commentary, some of which isn’t supported by the science.
“That gives people expectations about the benefits of biochar, which may not be realised in the real world and that leads to disappointment and disenchantment.”
There are also trade-offs involved.
Crop stubble, for example, can be burnt and made into biochar. But it can also be used in no-till farming to reduce erosion while increasing organic matter in the soil.
That said, other forms of biomass do exist such as invasive weeds and logging waste.
Biomass used to make biochar
Most biomass can be used for making biochar, as long as it has not been contaminated with toxic substances (e.g. heavy metals, PCBs).
Biomass feedstocks for biochar can be broadly classified into:
- Woods
- Grasses, seaweed, straw and other plant residues
- Husks and shells
- Manures and sludges
- Municipal Solid Waste including food waste
- Other industrial wastes, such as papermill waste.
- The type of biomass can have a big impact on biochar properties.
- Biomass generally consists of mineral matter, cellulose, hemicellulose, lignin and other organic compounds such as proteins, lipids and other complex organic compounds, in different proportions depending on biomass type.
Transformation of biomass into biochar
- During pyrolysis most mineral matter is retained and most of the organic compounds break down, separating into volatile components that are released as hot gas and aerosols, and residual solid components referred to as biochar.
- The biochar contains many different organic matter forms that mineralise at different rates, depending on the environment and the microbial community.
- The organic components can be classified into two main fractions:
- Persistent carbon that is resistant to breakdown for decades to millennia
- Mineralizable (sometimes referred to as labile) carbon in the form of organic compounds that are potentially available to microbes and plants.
- Condensates of the liberated gases, called wood vinegar or smoke water, contain over 300 chemicals, many beneficial to plants.
Ultimately, biochar is a good news story.
It can help fight global warming and, just maybe, bring a bit of the Amazon’s terra preta to Australian farms.
“I actually think there are lots of good things about biochar used wisely and in an informed way,” Professor Howden said.
“So let’s be positive, but let’s not over hype it.”
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