Small household biogas system

Advantages:

• Waste-to-Resource: Utilizes hazardous red mud (bauxite residue) and organic waste simultaneously.

• Enhanced Biogas Yield: Alkaline conditions optimize anaerobic digestion, boosting methane production.

• Low Cost: Uses cheap/free industrial waste (red mud) instead of commercial additives.

• Pollution Reduction: Treats organic waste while stabilizing toxic red mud (reducing pH, leaching risk).

• Biogas Upgrading: In-situ capture of CO₂ & H₂S by red mud, improving biogas purity for energy use.

Characteristics:

• High Alkalinity: Neutralizes acidic digestion intermediates, maintaining stable pH.

• Trace Elements: Provides beneficial minerals (e.g., iron) for microbial activity.

• Adsorption Capacity: Binds inhibitors (ammonia, VFAs) and contaminants (heavy metals, H₂S).

• Passive Additive: Requires simple mixing; no complex systems.

Application Scenarios:

• Alumina Refineries: On-site treatment of red mud combined with plant/food waste.

• Large-Scale Farms: Manure digestion with enhanced efficiency and odor/H₂S control.

• Food Processing Facilities: High-strength organic wastewater treatment with biogas recovery.

• Landfill Leachate Treatment: Co-digestion to stabilize leachate and boost energy yield.