Equipment Specifications
Biogas Collection & Handling Specifications
HDPE gas piping, Varec pressure/vacuum relief valves, flame arresters, regenerative blowers, Eldridge flow meters, PLC controls, and waste gas burners for covered lagoon digesters.
Material Properties & Ratings
Key material specifications and rated capacities for the standard biogas collection and handling system.
| Property | Unit | Value | Notes |
|---|---|---|---|
| Gas Collection Piping | — | HDPE | — |
| Operating Pressure (Negative) | inches w/c | -0.1 to -0.5 | — |
| Operating Pressure (Positive) | inches w/c | +0.1 to +0.4 | — |
| P/V Relief Valve Trim | — | 316 SS | — |
| Flame Arrester Material | — | 316 SS | — |
| Sediment Trap Capacity | gallons | 6 (sediment) + 6 (condensate) | — |
| Rated Gas Capacity | cu ft/hr | 82,700 | — |
| Blower Type | — | Regenerative | — |
| Blower Capacity (each) | SCFM | 690 min. | — |
| Flow Meter Range | cu ft/hr | 0 - 100,000 | — |
| Control Panel Rating | — | NEMA 4X Stainless Steel | — |
| Waste Gas Burner Capacity | cu ft/hr | 82,700 | — |
Key Features
Standard features included in every EFI biogas collection and handling system.
Complete turnkey biogas collection and handling system
82,700 cu ft/hr rated capacity throughout all components
HDPE gas collection piping with central conduit layout
Varec pressure/vacuum relief with 316 SS flame arrester
Dual regenerative blowers (690 SCFM each) with flexible connectors
Eldridge thermo mass gas flow meter (0-100,000 cu ft/hr) with totalizer
Automatic waste gas burner with electric ignition and propane pilot
NEMA 4X stainless steel PLC control panel with touch screen
Time cycle and pressure-based control logic
Integrated condensate management (sediment trap, drip traps, P-traps)
Flame trap assembly with 316 SS arrester sheets
Applications
EFI biogas collection and handling systems are designed for a range of anaerobic digester and wastewater treatment applications.
Covered lagoon anaerobic digesters
Agricultural waste lagoons with biogas capture
Municipal wastewater treatment facilities
Industrial process wastewater digesters
RNG pretreatment and flare systems
Dairy, poultry, and food processing wastewater systems
Detailed Specifications
Complete equipment specifications for the standard 82,700 cu ft/hr biogas collection and handling system.
| Component | Specification |
|---|---|
| System Rated Capacity | 82,700 cu ft/hr biogas |
| Gas Collection Piping | HDPE — central conduit along lagoon centerline |
| P/V Relief Valve | Varec Model 5810, 316 SS trim and flame arrester |
| Explosion Relief Valve | Varec Model 7100B |
| Sediment/Condensate Trap | Varec Model 233, welded steel, hot-dipped galvanized, 6+6 gal |
| Drip Traps | Varec Figure No. 246, rotating disc type, all low points |
| Flame Trap Assembly | Varec Model 452, 82,700 cu ft/hr, 316 SS |
| Pressure Relief Flame Trap | Varec Model 440, 82,700 cu ft/hr, 316 SS |
| Pilot Line Flame Check | Varec Model 5200 |
| Blowers | Rotron Model CP909, regenerative, 690 SCFM min. (qty 2) |
| Flow Meter | Eldridge thermo mass, 0-100,000 cu ft/hr with totalizer |
| Waste Gas Burner | Varec Model 244W, 82,700 cu ft/hr, auto electric ignition |
| Control Panel | NEMA 4X SS, PLC, touch screen, alarm horn |
| Control Logic | Time cycle (primary) + pressure-based (secondary) |
| Operating Pressure Range | -0.5 to +0.4 inches w/c |
Frequently Asked Questions
What is the rated gas handling capacity of EFI's standard system?
EFI's standard biogas collection and handling system is rated at 82,700 cu ft/hr throughout — from the pressure/vacuum relief valve and sediment trap through the flame trap assembly and waste gas burner. Systems are sized based on actual biogas production and can use multiple parallel units for higher volumes.
How does the pressure control system work?
The system maintains cover pressure between -0.5 and +0.4 inches water column. A Varec Model 5810 pressure/vacuum relief valve with 316 SS trim and flame arrester provides primary protection. A Varec Model 7100B explosion relief valve provides secondary protection. Blowers operate on PLC-controlled time cycles or pressure-based logic with adjustable high/low setpoints.
What type of flow metering is used?
EFI uses Eldridge thermo mass gas flow meters with a range of 0 to 100,000 cu ft/hr and totalizer function. Thermal mass flow meters provide accurate biogas measurement without requiring pressure or temperature compensation, and have no moving parts for reliable long-term operation.
How does the waste gas burner operate?
The Varec Model 244W waste gas burner has 82,700 cu ft/hr capacity with automatic electric ignition and propane pilot. The pilot operates only during waste gas flaring via a solenoid valve (fails open for safety). Pilot failure indication is displayed on the NEMA 4X control panel. During low-flow periods, one or two burners can be capped.
What daily maintenance is required?
Daily checks include: verify P-traps are full and overflowing, confirm the flare is burning properly, check igniter operation, verify normal flow on the meter, ensure the cover is not inflated, and confirm the gas equipment enclosure gate is closed and locked. Quarterly maintenance includes cleaning flare burners, verifying burners are level, and checking refractory material position.
Download Gas Collection System Specification Package
Get the complete biogas collection and handling system specification package including equipment data sheets, Varec component details, and PLC control system documentation.
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