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

Made with Slides.com