Biogas Power Plant Construction
Integrated EPC Solutions for Renewable Gas & Power Generation
Overview
Biogas Power Plants are renewable energy facilities that convert organic substrates into biogas through anaerobic digestion and subsequently transform this gas into electrical and thermal energy using Combined Heat and Power (CHP) systems. Mechasol provides end-to-end biogas power plant construction solutions, covering process design, mechanical systems, energy integration, and turnkey EPC execution.
Mechasol’s biogas solutions are engineered for continuous operation, feedstock flexibility, and high plant availability, making them suitable for agricultural, industrial, and municipal applications.
Plant Configuration & Process Concept
Based on the provided document, Mechasol biogas plants are typically configured with:
One or more primary digesters
Secondary digesters for increased gas yield
Digestate storage units with gas-tight membranes
Integrated CHP unit for power and heat recovery
The system is designed to ensure stable biological conditions, controlled gas production, and optimized energy utilization.
Feedstock Types & Feeding Systems
Feedstock Options
Mechasol biogas plants are engineered to process a wide range of substrates, including:
Each feedstock type influences digester sizing, heating demand, and equipment selection.
Feeding Systems Engineering
According to the document, feeding systems may include:
Solid feeders for silage and solid biomass
Pump-based feeding systems for liquid or pumpable substrates
Pre-treatment units such as grinders and pasteurization systems (for biowaste)
Proper feeding system design is critical for process stability and digester performance.
Digesters & Storage Systems
Anaerobic Digesters
Digesters are designed as:
Insulated, gas-tight concrete or steel tanks
Equipped with internal heating coils or external heat exchangers
Designed for mesophilic operation (~38–40°C)
Double-walled digesters with leakage detection may be applied for biowaste applications, as highlighted in the document.
Digestate Storage
Digestate storage tanks are equipped with:
Flexible gas storage membranes
Integrated agitation systems
Controlled discharge for agricultural or industrial reuse
Pumping & Transfer Systems
The document highlights that positive displacement pumps are predominantly used, including:
Progressive cavity pumps (high pressure, low maintenance)
Rotary lobe pumps (easy maintenance, higher wear)
Pump selection is based on:
These systems ensure reliable substrate circulation between digesters and storage units.
Heating System & Thermal Management
Maintaining digester temperature is essential for biological efficiency. Mechasol designs integrated heating systems utilizing:
From the document example, a 625 kWel biogas plant typically allocates recovered heat for:
Agitation & Mixing Systems
Efficient mixing prevents sedimentation and enhances gas yield.
Agitator Types
Agitators are typically operated intermittently (e.g. 10 minutes per hour) and synchronized with feeding cycles.
Gas Handling & Storage
Biogas produced in the digesters is:
Collected under gas-tight membranes
Routed to CHP units via controlled piping
Monitored for pressure, flow, and safety
Gas storage membranes act as buffer volumes, stabilizing CHP operation.
CHP Unit & Power Generation
Combined Heat and Power (CHP)
The CHP system converts biogas into:
Mechasol integrates:
This configuration maximizes overall plant efficiency.
Pasteurization & Hygienization Systems
For biowaste applications, EU regulations (e.g. EU 1774) require:
Heat treatment at 70°C for 1 hour
Controlled heating and mixing tanks
Dedicated pumping systems
Mechasol designs pasteurization units as fully integrated process modules, ensuring compliance and operational reliability.
Automation, Safety & Control
Biogas power plants are equipped with:
PLC-based automation systems
Gas safety and overpressure protection
Temperature, pressure, and level monitoring
Emergency shutdown and alarm systems
Automation ensures stable biological operation and safe energy production.
EPC & Construction Scope
Mechasol delivers biogas power plants as:
Equipment supply packages
Modular skid-mounted systems
Full EPC turnkey construction projects
Scope includes:
Process & mechanical engineering
Civil and structural coordination
Electrical & instrumentation works
Installation, commissioning, and operator training
Mechasol Value Proposition
Proven experience in biogas plant construction
Strong mechanical and thermal engineering capability
Optimized integration of feeding, digestion, and CHP systems
Compliance with EU and international standards
Long-term operational reliability focus
Summary
Mechasol Biogas Power Plant Construction solutions provide a robust, efficient, and sustainable approach to renewable energy generation. By integrating advanced digestion technology, reliable mechanical systems, and optimized CHP energy recovery, Mechasol delivers biogas plants that achieve high availability, stable operation, and maximum energy output.