Sewage Sludge Carbonization Plant
Integrated Treatment Solution
99% Sludge Volume Reduction
Pyrolysis Into Sludge Biochar
Up to 150 tons/day Processing Capacity
Is Your Sewage Sludge Suitable for Carbonization?
Municipal Sewage Sludge
Source: From municipal wastewater treatment plants (WWTPs)
River and Dredged Sludge
Source: From river, lake, or waterway dredging operations
Organic-Rich Non-Toxic Sludge
We do not process: Leather sludge, printing & dyeing sludge, and various chemical/industrial process sludges
Integrated Sewage Sludge Carbonization Solution
Our integrated sewage sludge carbonization solution combines dewatering, drying, carbonization, exhaust gas treatment and PLC automated control. Customized to your sludge and capacity, with optional biomass mixing for low-organic feedstocks.
Raw Sludge
Water Content 80%
Sludge Dewatering & Drying
Water Content 50% ~ 15%
Sludge Carbonization
Water Content below 5%
Sludge Biochar
Water Content below 5%
From Sludge Cake to Biochar: Measurable Sludge Reduction
Water content 80%
Sludge cake 80% moisture content
Water content 15%
Dried sludge 15% moisture content
Water content 0%
Carbonized sludge 0% moisture content
Beston Sludge Carbonization Machine Models
BST-06Quicker Sludge Carbonization Machine
Type:Pilot Testing
Input capacity:300-350 kg/h
Feedstock Moisture:Below 15%
Annual operation:More than 7200hrs
Rainbow vetted, low-cost verification of BCDR
Portable, small-scale with 8-hour rapid install
BST-50S Sludge Carbonization Machine
Type:Industrial-scale
Input capacity:150 tons/day
Feedstock Moisture:From 15% to 85%
Annual operation:More than 6,000 tons
BST-50 has Puro.earth & Isometric vetted
Tar-free, dust-free, running for 7,200 hrs/Y.
Parameters of Carbonization Machine
| Model | BST-06 Quicker | BST-50S |
|---|---|---|
| Operating Mode | Continuous | Continuous |
| Application | Pilot Testing | Commercial-scale |
| Certification Platform | Rainbow | Puro.earth, Isometric, Rainbow |
| Reactor Material | Stainless Steel 310s | Stainless Steel 310s |
| Feedstock Moisture | Below 15% | From 15% to 85% |
| Feedstock Size | 5-20mm | 5-20mm |
| Feeding Capacity (only for pyrolysis) | 300-350KG/H | 150T/d |
| Max. Pyrolysis Temperature (Combustion Chamber) | 650°C | 650°C |
| Residue Retention Time | 15-20 minutes | 15-20 minutes |
| Operating Pressure | -20 – 0 pa | -20 – 0 pa |
| Cooling Method | Water | Water |
| Exhaust Gas Treatment | Standard | Standard |
| Biochar Temperature | 45°C | 45°C |
| Annual Operating Hours | >7200hrs | >7200hrs |
| Land Space Required (L*W*H*m) | 35*15*8 | 80*90*12 |
| Power Consumption | 25.1kw/h | 584.5kw/h |
| Water Consumption | 3-5m³/day | 5-7m³/day |
| Fuel Consumption | 30-50m³/day | 220-260m³/h |
How Does Sewage Sludge Carbonization Work?
01Receiving & Controlled Feeding
Sludge is received and handled according to its consistency and the project’s storage requirements. The receiving arrangement can incorporate enclosure and odor collection where required.
02Mechanical Dewatering
Where needed, mechanical dewatering removes water before thermal drying. Equipment selection considers sludge dewaterability, conditioning requirements and the target cake condition.
03Drying & Feed Preparation
The dryer reduces moisture to the carbonization reactor’s required feed condition. Forming, sizing and feeding arrangements are selected to support consistent material handling.
04Optional Biomass Blending
For suitable projects, biomass blending can be evaluated to adjust feed characteristics and heating value. The need for blending and the mixing ratio are determined through testing and the project heat balance.
05Continuous Carbonization
Prepared sludge enters the reactor for controlled thermal conversion. Feed rate, temperature and residence time are selected around the feedstock behavior and target product characteristics.
06Biochar Cooling & Collection
The solid product is cooled and collected for handling, storage and sampling. Product testing helps determine its appropriate application or disposal route.
07Gas Treatment & Heat Recovery
Process gases and vapors are managed through the configured treatment system. Combustible gases and recoverable heat can support process heating, subject to the feedstock properties and overall energy balance.
SGS Test Report: From Sludge to Sludge Biochar
How does municipal sludge change after carbonization? Explore SGS laboratory test results comparing municipal sludge and sludge biochar, including moisture, volatile matter, and fixed carbon.
Raw Municipal Sludge & Municipal Sludge Biochar Analysis
Heavy Metal Analysis of Municipal Sludge and Biochar
SGS tested heavy metal concentrations in municipal sludge and municipal sludge biochar.
| Test Parameter | Raw Sludge | Sludge Biochar |
|---|---|---|
| Moisture | 6.80% | <0.1% |
| Ash | 45.96% | 78.27% |
| Volatile Matter | 49.03% | 11.51% |
| Fixed Carbon | 5.01% | 10.22% |
| Gross Calorific Value | 12.01 MJ/kg | 6.15 MJ/kg |
| Net Calorific Value | 10.27 MJ/kg | 6.05 MJ/kg |
Municipal Sludge Treatment Methods Comparision
Better chioceCompact , modular system
10–150 tons/day capacity
reduced exhaust emissions
Complex exhaust treatment;
potential greenhouse gas emissions;
suited for large projects
Requires large land area;
limited resource recovery
Limited applications
requires additives
Long processing cycle
high investment and land requirements
Sludge Biochar Applications
Carbonized sludge can be evaluated for energy recovery, construction materials, adsorbent preparation and other resource recovery routes. The final application depends on product testing, environmental requirements and local regulations.
Applications
Beston Global Sewage Sludge Carbonization Solution
FAQs for Sewage Sludge Carbonization Plant
What types of sewage sludge can be processed by a carbonization system?
Our sludge carbonization system is designed for organic sludge generated from municipal wastewater treatment plants and industrial wastewater treatment processes.
Before designing a solution, we evaluate key parameters including:
- Moisture content
- Organic matter content
- Ash content
- Heavy metal composition
- Daily processing capacity
A laboratory analysis or representative sample test is recommended before final equipment selection.
What moisture content is suitable for sewage sludge carbonization?
Moisture content is one of the most important factors affecting energy consumption and system design.
High-moisture sludge normally requires a drying or dewatering process before entering the carbonization unit.
We recommend customers provide the original moisture content so we can evaluate whether additional drying equipment is required.
Does your sludge carbonization system include sludge drying?
The complete solution can be customized according to sludge conditions.
For sludge with high moisture content, a drying or pre-treatment system may be integrated before carbonization to improve thermal efficiency and ensure stable operation.
Can sludge biochar be used for carbon credit projects?
Sludge biochar may have potential for carbon removal applications depending on feedstock eligibility, production process, carbon content, and third-party verification requirements.
For carbon credit projects, additional analysis such as organic carbon content, H/C ratio, and stability evaluation may be required.
How do you ensure the quality of sludge biochar?
Biochar quality is verified through laboratory analysis. Common testing items include:
- Fixed carbon
- Ash content
- Moisture
- Calorific value
- Heavy metals
- Other application-specific indicators
Third-party testing can help evaluate whether the final product meets project requirements.
What information is required for a sludge carbonization project evaluation?
To recommend a suitable carbonization solution, please provide:
- Sludge source
- Daily processing capacity
- Moisture content
- Current disposal method
- Desired application of final biochar
- Local environmental requirements
