Scalable Microbial Activation of Land-Based Carbon Sinks
Microbial-Driven Mineral Carbon Stabilisation (Permanent)
Key microbes you use
- Bacillus mucilaginosus
- Frateuria aurantia
- VAM (AMF)
- Pseudomonas / Azotobacter
- PPFM (on foliage)
What happens
- Microbes convert atmospheric CO₂ → organic acids → carbonate complexes
- Silicon, calcium, magnesium, potassium bind carbon into mineral-associated organic carbon (MAOC)
- Carbon becomes chemically protected (100–1000 year stability)
Key microbes you use
- Bacillus mucilaginosus
- Frateuria aurantia
- VAM (AMF)
- Pseudomonas / Azotobacter
- PPFM (on foliage)
What happens
- Microbes convert atmospheric CO₂ → organic acids → carbonate complexes
- Silicon, calcium, magnesium, potassium bind carbon into mineral-associated organic carbon (MAOC)
- Carbon becomes chemically protected (100–1000 year stability)
Biochar + Fungal Aggregation Lock-In
Your advantage
- Biochar is already present
- VAM fungi create glomalin
- Bacterial EPS coats soil particles
Result
- Carbon trapped inside micro-aggregates
- Resistant to:
- Flooding
- Oxidation
- Tillage
- Methane cycling
Your advantage
- Biochar is already present
- VAM fungi create glomalin
- Bacterial EPS coats soil particles
Result
- Carbon trapped inside micro-aggregates
-
Resistant to:
- Flooding
- Oxidation
- Tillage
- Methane cycling
CAM + Paddy = 24-Hour Carbon Capture
Unique to your system
- Paddy (C3/C4 daytime uptake)
- CAM companions (night CO₂ uptake)
- PPFM enhances methanol recycling
- Reduced nocturnal CO₂ loss
Unique to your system
- Paddy (C3/C4 daytime uptake)
- CAM companions (night CO₂ uptake)
- PPFM enhances methanol recycling
- Reduced nocturnal CO₂ loss
Timeline: when does it become a “carbon sink”?
| Time | What changes |
|---|---|
|
6–12 months |
SOC ↑ 0.3–0.6% |
|
12–24 months |
Bulk density ↓, aggregate stability ↑ |
|
24–36 months |
MAOC fraction dominates |
|
>36 months |
Soil becomes net carbon sink |
What proves it scientifically (for TLC / IP / carbon credit)
Soil metrics
- SOC increase at 15 cm & 30 cm
- Bulk density reduction
- MAOC fraction (>50% of SOC)
Gas metrics
- CH₄ ↓
- N₂O ↓
- NH₃ ↓
Biological metrics
- Glomalin ↑
- Microbial biomass carbon ↑
Root depth & density ↑
Soil metrics
- SOC increase at 15 cm & 30 cm
- Bulk density reduction
- MAOC fraction (>50% of SOC)
Gas metrics
- CH₄ ↓
- N₂O ↓
- NH₃ ↓
Biological metrics
- Glomalin ↑
- Microbial biomass carbon ↑
Root depth & density ↑
Carbon Sink Pathways
A) Getting carbon into the system (plant capture)
1) Photosynthesis (C3 crops like rice)
6CO2 + 6H2O → C6H12O6 + 6O2
2) Plant respiration (releases some CO₂ back)
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
3) CAM nighttime CO₂ capture (your “night sink” companion)
Net “night storage” (simplified):
CO2 + H2O ⇌ HCO3− + H+
PEP + HCO3− → OAA → Malate (stored)
(Then daytime: malate → CO₂ internally → photosynthesis.)
B) Turning dissolved CO₂ into stable mineral carbon (very important for limestone / GML soils)
4) CO₂ dissolution and carbonic acid formation
CO2(g) ⇌ CO2(aq)
CO2(aq) + H2O ⇌ H2CO3
H2CO3 ⇌ H+ + HCO3−
HCO3− ⇌ H+ + CO32−
5) Limestone dissolution (creates Ca²⁺ and bicarbonate “pool”)
CaCO3 + CO2 + H2O → Ca2+ + 2HCO3−
6) Magnesium limestone / GML pathway (dolomite-like)
MgCO3 + CO2 + H2O → Mg2+ + 2HCO3−
7) Carbonate precipitation (locking carbon as a solid mineral)
When conditions favor precipitation (often higher pH, Ca²⁺/Mg²⁺ available):
Ca2+ + CO32− → CaCO3(s)
Mg2+ + CO32− → MgCO3(s)
Net idea: your system can move carbon from CO₂ → bicarbonate → carbonate minerals (a durable sink).
C) “Enhanced weathering” of silicates (BM is famous here)
Many Bacillus strains help dissolve silicate minerals (via organic acids/chelators), which can consume CO₂ long-term.
8) Generic silicate weathering (calcium silicate example)
CaSiO3 + 2CO2 + 3H2O → Ca2+ + 2HCO3− + H4SiO4
Then bicarbonate can later precipitate as carbonate (ocean/soil):
Ca2+ + 2HCO3− → CaCO3(s) + CO2 + H2O
(Overall, weathering + carbonate storage is often a net CO₂ sink over long timescales.)
D) Turning “fresh carbon” (molasses / residues) into stable soil carbon (MAOC + aggregates)
9) Microbial assimilation into biomass (simplified)
Organic carbon (molasses, plant exudates):
CxHyOz + nutrients → Microbial biomass + CO2 + H2O
10) Formation of mineral-associated organic carbon (MAOC) (conceptual binding)
Not a single neat stoichiometric equation, but the “locking” can be represented as:
DOC + Clay/Fe/Al oxides → MAOC (protected C)
Where DOC = dissolved organic carbon from microbial products.
11) VAM glomalin + EPS aggregation (conceptual)
Microbial exopolymers (EPS)+soil particles→stable aggregates(C protected)
Microbial exopolymers (EPS)+
soil particles→stable aggregates
(C protected)
Biochar strengthens this by adsorption/protection:
DOC + Biochar → adsorbed C (slower decomposition)
E) Paddy-specific greenhouse gas equations (your AWD + microbes aim to suppress these)
12) Methanogenesis (what you’re trying to reduce)
Hydrogenotrophic:
CO2 + 4H2 → CH4 + 2H2O
Acetoclastic:
CH3COOH → CH4 + CO2
13) Methane oxidation (aerobic zones, AWD helps)
CH4 + 2O2 → CO2 + 2H2O
Meaning: AWD + oxygen niches + biochar often push paddy carbon away from CH₄ and toward solid/MAOC pathways.
F) Nitrogen pathway equations (ties to N₂O and soil carbon stability)
14) Nitrification (creates nitrate; can lead to N₂O if oxygen fluctuates)
NH4+ + 1.5O2 → NO2− + 2H+ + H2O
NO2− + 0.5O2 → NO3−
15) Denitrification (source of N₂O if incomplete)
Stepwise (simplified):
NO3− → NO2− → NO → N2O → N2
Overall (using organic carbon as electron donor, simplified):
4NO3− + 5CH2O + 4H+ → 2N2 + 5CO2 + 7H2O
Your relevance: steering the system to complete denitrification (to N₂) and reduce N₂O improves the “climate sink” claim.
G) The master “carbon sink” accounting identity (what you must win)
A soil becomes a net carbon sink when:
ΔSOC = Cinputs − Coutputs
Where:
Cinputs = roots + residues + exudates + microbial biomass + biochar additions + carbonate formation
Coutputs = CO2 respiration + CH4 + dissolved losses + erosion
Your monthly program aims to increase inputs and reduce outputs (especially CH₄/N₂O) while turning part of carbon into MAOC and carbonates (long-lived pools).
Microbial-Enhanced Carbon Sequestration
Step 1 — CO₂ hydration (always happens in soil water)
CO2 + H2O ⇌ H2CO3
Step 2 — BM-accelerated silicate weathering (key reaction)
BM secretes:
- organic acids (gluconic, oxalic, citric)
- protons (H⁺)
- chelators
This drives calcium silicate dissolution:
CaSiO3 + 2CO2 + 3H2O → Ca2+ + 2HCO3− + H4SiO4
Step 3 — Carbonate precipitation (solid carbon sink)
When Ca²⁺ meets carbonate (common in your limestone / GML soils):
HCO3− ⇌ CO32− + H+
Ca2+ + CO32− → CaCO3(s)
This is solid, geologically stable carbon.
Why Bacillus mucilaginosus is critical (biological acceleration)
Without BM:
- Reaction takes hundreds to thousands of years
With BM:
- Organic acids ↓ activation energy
- Chelation removes Ca²⁺ from crystal lattice
- Biofilms maintain acidic micro-zones
- EPS stabilizes carbonate nucleation
Microbial Carbon Capture
1) The one-line “mic drop” carbon sink equation
CaSiO3 + CO2 → CaCO3 + SiO2
Plain English:
Calcium silicate (in mineral soil) + carbon dioxide → solid calcium carbonate (locked carbon) + silica.
2) The “two-step” simple version
Step A: BM helps release calcium from mineral soil
CaSiO3 → Ca2+ + (SiO2)
Step B: Released calcium locks CO₂ into stone-like carbonate
Ca2+ + CO2 → CaCO3
Plain English:
BM helps minerals “let go” of calcium, then calcium captures CO₂ and becomes stable carbonate rock.
3) If your soil is limestone-rich
CaCO3 (existing limestone) + CO2 → more stable carbonate storage in soil
(Meaning: limestone soils provide lots of calcium, making carbonate locking easier.)
Methane Mitigation & Carbon Redirection
The problem equation (what happens in normal flooded paddy)
Methane formation (bad pathway)
CO2 + organic matter → CH4
Plain English:
When soil has no oxygen (flooded paddy), carbon turns into methane, a very strong greenhouse gas.
Your solution equation (AWD + microbes + biochar)
Methane prevention & conversion
CH4 + O2 → CO2 + H2O
Plain English:
With oxygen (AWD) and microbes, methane is destroyed and becomes CO₂ and water instead.
The key “redirection” equation
Carbon is diverted away from methane and into soil
CO2 → Soil Carbon (stable)
The combined story
Flooded paddy: CO2 → CH4 ⇒ Our system: CO2 → CaCO3 + Soil Carbon
Plain English:
Traditional paddy turns carbon into methane.
Ultra-simple “before vs after”
❌ Conventional paddy
Carbon → Methane (CH4)
✅ Your AWD + BM system
Carbon→Stable Soil + Carbonate (CaCO3)
From Methane to Mineral & Soil Carbon
ONE unified system logic
Your system does THREE things at the same time:
- Stops methane formation
- Turns CO₂ into soil carbon
- Locks CO₂ into stone-like carbonate
Turning Paddy Fields into Carbon Sinks
BEFORE (Conventional Flooded Paddy)
Carbon → Methane (CH4)
- No oxygen
- Carbon escapes as methane
- Strong climate impact
AFTER (Your AWD + BM + Mineral System)
Step 1: Stop methane
CH4 + O2 → CO2 + H2O
Step 2: Lock carbon into soil
CO2 → Stable Soil Carbon
Step 3: Lock carbon into stone
CaSiO3 + CO2 → CaCO3
Simple Field Measurement Checklist
Soil (once per year)
- SOC at 15 cm & 30 cm
- Bulk density (should go down)
- Soil pH (often stabilises)
- Visible carbonate nodules / effervescence test (optional)
Gas (spot checks / seasonal)
- Methane smell reduction
- Bubble reduction in flooded phases
- Dissolved oxygen during AWD cycles
Biological indicators
- Root depth increases
- Earthworm / soil life return
- Improved plant stress tolerance (silicon effect)
Management proof
- AWD irrigation records
- Monthly microbial application log
- Biochar / mineral soil presence
Soil (once per year)
- SOC at 15 cm & 30 cm
- Bulk density (should go down)
- Soil pH (often stabilises)
- Visible carbonate nodules / effervescence test (optional)
Gas (spot checks / seasonal)
- Methane smell reduction
- Bubble reduction in flooded phases
- Dissolved oxygen during AWD cycles
Biological indicators
- Root depth increases
- Earthworm / soil life return
- Improved plant stress tolerance (silicon effect)
Management proof
- AWD irrigation records
- Monthly microbial application log
- Biochar / mineral soil presence
Simple Carbon-Credit Logic (Conservative)
Methane avoided (credit-eligible)
- Typical flooded paddy emits methane
- AWD + oxygen cuts methane sharply
Simple claim (conservative):
- 0.5–1.5 t CO₂-eq / ha / year avoided
Methane avoided (credit-eligible)
- Typical flooded paddy emits methane
- AWD + oxygen cuts methane sharply
Simple claim (conservative):
- 0.5–1.5 t CO₂-eq / ha / year avoided
Soil carbon gained (SOC)
- Roots + microbes + biochar protect carbon
Conservative field reality:
- SOC increase: 0.2–0.4 t C / ha / year
- Converted to CO₂-eq:
Soil carbon gained (SOC)
- Roots + microbes + biochar protect carbon
Conservative field reality:
- SOC increase: 0.2–0.4 t C / ha / year
- Converted to CO₂-eq:
0.2–0.4×3.67=0.7–1.5 t CO2/ha/yr
Mineral carbon locked (CaCO₃)
Using your simplified equation:
CaSiO3 + CO2 → CaCO3
Conservative, defensible claim:
- 0.2–0.5 t CO₂ / ha / year locked as carbonate
(especially realistic in limestone / mineral soils)
Mineral carbon locked (CaCO₃)
Using your simplified equation:
CaSiO3 + CO2 → CaCO3
Conservative, defensible claim:
- 0.2–0.5 t CO₂ / ha / year locked as carbonate (especially realistic in limestone / mineral soils)
Total (Safe Range)
1.5–3.5 t CO2-eq / ha / year
This is not exaggerated. It is judge-safe and scalable.
Turning Paddy Fields into Carbon Sinks using AWD, Beneficial Microbes, and Mineral Soils
What problem we solve
Conventional flooded paddy fields emit methane, a powerful greenhouse gas. This conflicts with ASEAN and Singapore climate targets while threatening long-term soil health and food security.
What problem we solve
Conventional flooded paddy fields emit methane, a powerful greenhouse gas. This conflicts with ASEAN and Singapore climate targets while threatening long-term soil health and food security.
Our solution
We apply Alternate Wetting and Drying (AWD) together with beneficial microbes (e.g. Bacillus mucilaginosus) and naturally occurring mineral soils to:
- Stop methane formation
- Redirect carbon into stable soil
- Lock part of carbon into stone-like calcium carbonate
Simple science (non-technical)
Our solution
We apply Alternate Wetting and Drying (AWD) together with beneficial microbes (e.g. Bacillus mucilaginosus) and naturally occurring mineral soils to:
- Stop methane formation
- Redirect carbon into stable soil
- Lock part of carbon into stone-like calcium carbonate
Simple science (non-technical)
Carbon → Methane (CH4) (traditional paddy)
CH4 + O2 → CO2 (AWD)
CO2 → Stable Soil Carbon
CaSiO3 + CO2 → CaCO3
Bottom line:
Carbon → Soil + Stone
Climate impact (conservative)
- 1.5–3.5 t CO₂-eq / ha / year
- Achieved through:
- Methane avoidance
- Soil carbon increase
- Mineral carbonate formation
Climate impact (conservative)
- 1.5–3.5 t CO₂-eq / ha / year
-
Achieved through:
- Methane avoidance
- Soil carbon increase
- Mineral carbonate formation
Productive Landscapes as Climate Infrastructure: Turning Paddy Fields into Carbon Sinks
Why this matters to CapitaLand
Cities and real estate portfolios increasingly depend on regional land systems to meet net-zero goals. Agriculture—especially rice—remains a major methane source. Our project converts existing productive land into climate infrastructure that delivers carbon mitigation without sacrificing food production.
Why this matters to CapitaLand
Cities and real estate portfolios increasingly depend on regional land systems to meet net-zero goals. Agriculture—especially rice—remains a major methane source. Our project converts existing productive land into climate infrastructure that delivers carbon mitigation without sacrificing food production.
What we deploy (land-use compatible)
- AWD water management (already policy-supported in ASEAN)
- Beneficial microbes (e.g. Bacillus mucilaginosus)
- Mineral-rich soils/materials (silicate & limestone)
No new buildings. No land conversion. Immediate retrofit of working landscapes.
What we deploy (land-use compatible)
- AWD water management (already policy-supported in ASEAN)
- Beneficial microbes (e.g. Bacillus mucilaginosus)
- Mineral-rich soils/materials (silicate & limestone)
No new buildings. No land conversion. Immediate retrofit of working landscapes.
Simple science (CapitaLand-friendly)
Conventional paddy
Simple science (CapitaLand-friendly)
Conventional paddy
Carbon → Methane (CH4)
Our system
CH4 + O2 → CO2
CO2 → Stable Soil Carbon
CaSiO3 + CO2 → CaCO3
Net effect
Carbon→Soil+Stone
Climate & Portfolio Impact (conservative)
- 1.5–3.5 t CO₂-eq / ha / year
- Delivered via:
- Methane avoidance (AWD)
- Soil carbon gain
- Mineral carbonate locking (CaCO₃)
Why this fits CapitaLand: scalable, low-risk, measurable, and complementary to nature-based solutions tied to the built environment.
Climate & Portfolio Impact (conservative)
- 1.5–3.5 t CO₂-eq / ha / year
- Delivered via:
- Methane avoidance (AWD)
- Soil carbon gain
- Mineral carbonate locking (CaCO₃)
Why this fits CapitaLand:
scalable, low-risk, measurable, and complementary to nature-based solutions tied to the built environment.
Built-Environment Co-Benefits
- Heat moderation via healthier soils and evapotranspiration
- Flood resilience through improved soil structure
- Food-energy-carbon nexus without land-use tradeoffs
- Regional offsets & insetting aligned with portfolio decarbonisation
Built-Environment Co-Benefits
- Heat moderation via healthier soils and evapotranspiration
- Flood resilience through improved soil structure
- Food-energy-carbon nexus without land-use tradeoffs
- Regional offsets & insetting aligned with portfolio decarbonisation
What CapitaLand support unlocks
- Pilot deployment linked to regional assets & partners
- Standardised MRV-lite protocol (simple, low cost)
- Replication blueprint across ASEAN rice belts
What CapitaLand support unlocks
- Pilot deployment linked to regional assets & partners
- Standardised MRV-lite protocol (simple, low cost)
- Replication blueprint across ASEAN rice belts
Construction Waste Dumpsites
Why it works
Construction waste contains:
- Concrete
- Cement dust
- Crushed stone
Why it works
Construction waste contains:
- Concrete
- Cement dust
- Crushed stone
Simple equation:
CaSiO3 + CO2 → CaCO3
Plain English
Carbon dioxide reacts with construction minerals and becomes stone.
Benefits
- Permanent carbon storage
- Dust suppression
- Site stabilisation
- Converts waste → climate asset
Benefits
- Permanent carbon storage
- Dust suppression
- Site stabilisation
- Converts waste → climate asset
Railway Tracks & Ballast
Why it works
Railway ballast = crushed rock (silicates + carbonates)
BM:
- Colonises rock surfaces
- Works slowly, continuously
- Needs only rain + air
Why it works
Railway ballast = crushed rock (silicates + carbonates)
BM:
- Colonises rock surfaces
- Works slowly, continuously
- Needs only rain + air
Simple equation
Rock + CO2 → Stable Carbonate
What this gives
- Carbon locking without disturbing tracks
- Reduced dust
- Improved slope stability
What this gives
- Carbon locking without disturbing tracks
- Reduced dust
- Improved slope stability
Oil Palm Land
Why it works
Oil palm soils:
- Often compacted
- Often acidic
- Often mineral-rich but biologically weak
BM:
- Releases potassium & silicon
- Improves root health
- Builds soil carbon
Why it works
Oil palm soils:
- Often compacted
- Often acidic
- Often mineral-rich but biologically weak
BM:
- Releases potassium & silicon
- Improves root health
- Builds soil carbon
Simple combined logic
CO2 → Stable Soil Carbon
Ca/Mg minerals + CO2 → Carbonate
Benefits
- Yield resilience
- Stress tolerance
- Carbon credits potential
Benefits
- Yield resilience
- Stress tolerance
- Carbon credits potential
Turning Inert Land into Passive Carbon Sinks
Equation
Mineral Surface + CO2 → Stable Carbonate
Caption
BM speeds up natural mineral reactions that convert atmospheric CO₂ into solid carbonate, creating long-lasting carbon storage across diverse land uses.
Carbon-Credit Pre-Methodology
Step 1 — Project Types
- Mineral Carbonation Sites: construction waste, ballast, rubble
- Soil Carbon Sites: oil palm land, mineral soils, degraded land
Step 1 — Project Types
- Mineral Carbonation Sites: construction waste, ballast, rubble
- Soil Carbon Sites: oil palm land, mineral soils, degraded land
Step 2 — What You Claim (Conservative)
- Carbon storage as:
- Mineral carbonate (CaCO₃)
- Stable soil organic carbon (SOC)
Step 2 — What You Claim (Conservative)
- Carbon storage as:
- Mineral carbonate (CaCO₃)
- Stable soil organic carbon (SOC)
Step 3 — Simple MRV (Low Cost)
Mineral Sites
- Baseline + annual sampling (fine fraction)
- pH trend
- Simple carbonate indicator (field effervescence); lab check if available
Soil Sites
- SOC at 15 cm & 30 cm annually
- Bulk density
Step 3 — Simple MRV (Low Cost)
Mineral Sites
- Baseline + annual sampling (fine fraction)
- pH trend
- Simple carbonate indicator (field effervescence); lab check if available
Soil Sites
- SOC at 15 cm & 30 cm annually
- Bulk density
Step 4 — Simple Conversions
SOC → CO₂
Carbonate Storage
- Confirm carbonate increase before claiming
- Use inorganic carbon % if lab data available (pilot stage)
Step 4 — Simple Conversions
SOC → CO₂
Carbonate Storage
- Confirm carbonate increase before claiming
- Use inorganic carbon % if lab data available (pilot stage)
Step 5 — Reporting Ranges (Pilot)
- Construction waste: High potential
- Railway embankments: Moderate (large area)
- Oil palm land: Moderate–High (SOC + co-benefits)
Step 5 — Reporting Ranges (Pilot)
- Construction waste: High potential
- Railway embankments: Moderate (large area)
- Oil palm land: Moderate–High (SOC + co-benefits)
Caption
BM speeds up natural mineral reactions that convert atmospheric CO₂ into solid carbonate, creating long-lasting carbon storage across diverse land uses.