Rice
+20% average yield
Reported paddy trials showed average yield increases around 20% (peak 23.4%) and grain protein content up to 27% higher.
Integrated biomass · biochar · carbon removal
From biomass residues to verified carbon removal.
Tongao Group integrates biomass collection, preprocessing, carbonisation, clean-energy recovery, biochar products, soil improvement, low-carbon agriculture, and international carbon-project development within a single operating platform — engineered to be scaled, financed, and verified.
Puro.earth certified
2025
First CSI project in China
2026
Group companies
15
Group at a glance
15
Affiliated group companies
200,000+
Tonnes of biomass processed annually
7
Biomass preprocessing facilities in Zhejiang
Pending management confirmation (7–8).
2
Internationally certified carbon-removal projects
918
tCO₂ removed — first Puro.earth issuance
4th
company in Asia certified by Puro.earth (2025)
Integrated value chain
One operating platform — from biomass residues to carbon-credit sales.
Each stage is operated or coordinated by Tongao — physical infrastructure, agricultural operations, and carbon accounting on one continuous line.
01
Biomass sourcing
Agricultural, forestry, bamboo and landscaping residues aggregated across regional collection networks.
02
Collection & preprocessing
Seven regional preprocessing plants in Zhejiang handle sorting, drying, sizing and quality control.
03
Carbonisation
Centralised and distributed carbonisation systems produce biochar and pyrolysis gas with self-sustaining thermal loops.
04
Clean-energy recovery
Recovered heat and combustible gas feed steam, hot water, hot-air drying and on-site power.
05
Biochar & product formulation
Biochar-based fertilisers, growing substrates, feed additives, construction and battery-grade materials.
06
Soil & agricultural application
Crop-specific programmes for rice, grapes, tea and vegetables with soil restoration and low-carbon farming.
07
Digital MRV & traceability
Data pipelines from feedstock, production and field application feed independent verification.
08
Carbon certification
Puro.earth, Global C-Sink Registry and CSI project development and issuance.
09
Carbon-credit commercialisation
Offtake agreements with corporate buyers and low-carbon products routed to global markets.
Business platform
Eight business units, one integrated group.
Each unit is a working operating company — not a diagram. Together they close the loop from feedstock to verified carbon-removal and low-carbon food.
Biomass Collection & Preprocessing
Collection and treatment of agricultural, forestry and landscaping residues at regional scale.
Biomass Valorisation
Conversion into fertilisers, fuels, feed products, growing substrates and biochar materials.
Biochar & Soil Solutions
Biochar-based fertilisers, growing substrates and crop-specific soil-improvement programmes.
Carbon Removal
Project design, dMRV, validation, issuance and carbon-credit commercialisation.
Equipment & Clean Energy
Centralised and distributed carbonisation equipment, hot-air, hot-water, steam and drying systems.
Circular Agriculture
Biochar-enabled agricultural production, soil restoration and low-carbon products.
Food Supply Chain
Food processing, agricultural sourcing, cold-chain logistics and institutional distribution.
Integrated Project Development (AOD)
EPC + O delivery of full-value-chain biomass and agricultural projects for governments, industrial parks and investors.
Facility · Zhejiang
Regional biomass hubs, real infrastructure.
Biochar
Carbon locked for centuries.
Field · Tea
+41% yield with biochar.
Carbon removal · Tongao Greenchar
Carbon-removal projects that are physically real, agriculturally productive, and independently verified.
Tongao Greenchar Climate Solutions combines Tongao's physical biomass and agricultural operating network with international carbon-market development, digital MRV, certification and offtake execution.
Project development lifecycle
- 01Feedstock assessment
- 02Feasibility study
- 03Business-model design
- 04Technology & equipment selection
- 05Project documentation
- 06Baseline & additionality
- 07Facility commissioning
- 08Operational monitoring
- 09Digital MRV
- 10Validation & verification
- 11Credit issuance
- 12Carbon-credit sales & offtake
Proven agricultural applications
Biochar performance across rice, grapes, tea and vegetables.
Results from specific Tongao-supported field applications. Outcomes vary by soil, crop, climate, biochar characteristics and application rate. Field-level methodology and reports available on request.
Grapes
+27.6% sugar content
At 200 kg biochar/mu, average cluster weight reached 789 g and sugar content averaged 18.56° (peak 21°).
Tea
+41% bud weight
Hundred-bud weight increased by 41.11%; one-bud-one-leaf ratio improved to 81.8%.
Vegetables & substrates
Better water & nutrient retention
Biochar-blended substrates improved water and nutrient retention and reduced soil bulk density.
Projects & facilities
Open the facility mapA working footprint across the Yangtze River Delta.
Seven preprocessing plants, two biochar production sites, an organic fertiliser plant, and internationally certified carbon-removal projects — all concentrated in Zhejiang, expandable nationally and internationally.
Jiaxing
Jiaxing Biochar Production Facility
Biochar production + Puro.earth certified project
Xiuzhou, Jiaxing
Xiuzhou Preprocessing & Biochar Project
Preprocessing + Global C-Sink Registry
Pinghu
Pinghu Preprocessing Facility
Biomass preprocessing
Haining
Haining Preprocessing Facility
Biomass preprocessing
Jiashan
Jiashan Preprocessing Facility
Biomass preprocessing
Tongxiang
Tongxiang Organic Fertiliser Plant
Organic fertiliser production
Certifications
Verified by leading carbon-removal registries.
Puro.earth
Verified
Jiaxing Tongao Biochar Project — first issuance of 918 tCO₂
Asia's 4th company certified by Puro.earth (June 2025). Largest issuance volume in China to date; details pending independent verification for public claims.
Global C-Sink Registry
Verified
Xiuzhou Tongao Biochar Project — verified
Verification linked to the Xiuzhou preprocessing site.
CSI
Verified
First CSI-certified biochar project in China (March 2026)
'First in China' framing pending final documentary confirmation before public communication.
Research collaborations
Working with leading Chinese research institutions.
- Institute of Soil Science, Chinese Academy of Sciences
- Institute of Urban Environment, Chinese Academy of Sciences
- China National Rice Research Institute
- Zhejiang University — School of Energy Engineering
- Zhejiang A&F University
- Zhejiang University of Science and Technology
- Yangtze River Delta Institute of Healthy Agriculture
Partners & institutions
Certification registries, research institutions, and Tongao's operating group.
Named collaborators only — no fabricated logos. Verified marks will replace the name tiles as each partner's brand file is confirmed.
Certification body03
Research institution07
Build the next generation of climate infrastructure
Verified carbon removal, built on real physical infrastructure.
Tongao works with governments, investors, carbon buyers, agricultural organisations and industrial partners to develop commercially viable biomass-valorisation and carbon-removal projects.
Zhejiang Tongao Environmental Technology Co., Ltd.