Boost Urban Agriculture
& Regenerate urban waste
in a close loop of carbon
Urban
Carbon
Biochar has proven
to be a solid CDR method...
Heated greenhouses are useful for food resilience...
but still emits CO2 during pyrolysis
but often rely on fossile heat sources
Lets make heat & CO2 from pyrolysis work for our greenhouse...
...and get rid
of the fossil fuels
Greenhouses need higher CO2 levels than ambiant air
...and heat
1200-1300 PPM
450 PPM
CO2 levels vary as plants take carbon
Excess and depletion should be balanced
600-1300 PPM
450 PPM
300 PPM
Why not let DACC do
only the buffering work,
clipping high levels of CO2
and sustaining low levels of CO2 ?
And filter flue gas to allow
only clean CO2 left
IN:
Clean wood waste
Recycled / Looped:
Heat + CO2
OUT:
Produce
Biochar
Trees
This way we will have a
80% Nature based
20% Technology based
solution
To provide
mostly permanent storage
we should grow:
Trees for afforestation
Fast rotation plants for biomass burial
Produce
Best LCA possible
Local co benefits
CDR
Our goals:
Technical view
Solar
power
+ heat
The building blocks
Greenhouse
ventilation
Flue gas
filtration
DACC
buffering
Biochar
Biochar
wood
chips
mulch
Carbon
Mix
Heat
Drainy soils
Compost
Forest
plants
Biomass energy
Composting
CO2 injection in greenhouse
Wood
waste
grade A
Timber
Upcyling
Upcycling
Gazeous
CO2
DACC
Power
Biomass Burial
Logical view
Diffusion & capture in 4 steps
Building sites, layout operations,
logistics,food markets, deliveries...
Such activities produce clean wood waste,
materials still rated "Grade A Wood"
Crates, pallets, formwork, packaging, timber cutoffs...
Most of the time this wood waste goes to some kind of downcycling or incineration the dirty way,
...because it is
burnt along with common waste: toys, plastics, furniture,
metals etc...
And even the recycling in panels or agglomerates will end,
one day or another,
...with the
incineration of
composites:
glues, paint, melamin,
resins etc...
But the carbon within this wood can be transformed and kept clean
from end to end.
It deserves
to become circular
& regenerative.
This carbon can be put to work and bring many co-benefits to reach
systemic efficiency
How could this carbon help increase
urban resilience ?
Wood can fix urban biowaste and allow it to become living soil again and harbour organic matter and water.
Functions
COMPOSTING MIX
AFFORESTATION
CO2 INJECTION
Functions
BIOMASS ENERGY
GREEN POWER
URBAN HEAT LOOP
Wood can give back its caloric power when used in a local and renewable energy grid.
Functions
Wood can be put in a stable form of carbon as biochar and provide a clean way of capture in the 1000 year range.
BIOCHAR
DRAINY SOILS
BIOMASS BURIAL
Biomass Burial
400-600 yr Venice stilts
5-8000 yr Bog Wood
Functions
Reusable timber can be stocked in a temporary buffer warehouse, the time for the upcycling network to be notified
(architects, event organizers, designers...)
UPCYCLING
REUSE STRATEGIES
TEMPORARY STOCK
Once those simple functions start to be linked, interesting things happen...
Planning
urban forests
will ask massive
projects
Inject CO2
in greenhouses is useful as long as this CO2 isn't fossil...
optimize
diversify
Wood waste are a key element for local compost and can be captured in biochar
Making biochar is nice, but there is still some CO2
vented out...
Urban farms
and vegetalisation need fertile and drainy soils
And those interesting things become regenerative processes for urban places
A site to locate a demonstrator ?
Where Paris has an history with Carbon...
Former "Gare des Mines"
(Coal Mine Station)
north of the 'Chapelle Charbon' quarter...
...The place where coal and gas were brought to Paris during 120 year.
Near a massive logistics hub and future
building sites (2024 Olympics and others).
Afforestation Greenhouse
Beyond
the demonstrator
True biomass CHP
biochar + energy production
True afforestation
production plant
A complete circuit of carbon:
afforestation, torrefied wood, biochar, biomass burial...
19 to 200 kWe
28 to 292 kWth
Scale-up on industrial wasteland
[ 18Mt CO2 emissions to compensate... ]
Carbone-Urbain.com
Malcolm Hammer 2022-2023
with support from
Paris & Métropole Aménagement
Coopérative Carbone Paris Métropole
Paris&Co Urban Lab