Biogas Digester Tank
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  • Biogas Digester Tank

  • Biogas Digester Tank

  • Biogas Digester Tank - Henan Lane Heavy Industry Machinery Technology Co., Ltd.

  • Biogas Digester Tank - Henan Lane Heavy Industry Machinery Technology Co., Ltd.

Biogas Digester Tank

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1. Introduction: Turn Organic Waste into Clean, Profitable Energy

In an era of rising energy costs and strict environmental compliance, converting organic waste into renewable energy is no longer just an environmental goal—it is a proven, profitable business strategy.

Our Industrial-Grade Anaerobic Biogas Digester Tanks are engineered to provide maximum biochemical conversion efficiency, exceptional structural longevity, and seamless automated operation. Built with advanced Glass-Fused-to-Steel (GFS) panels or heavy-duty coated alloys, our biogas digester tanks offer unmatched corrosion resistance against acidic digestate and aggressive hydrogen sulfide (H2S).

Whether you need a compact 10 m³∼100 m³ skid-mounted unit for decentralized farms or a 1,000 m³∼10,000 m³ industrial-scale Biogas Digester Tank, our custom-engineered systems ensure rapid project payback, reliable biogas production, and high-value bio-fertilizer output.

2. Applicable Feedstocks & Raw Materials

Our anaerobic biogas digester tank accommodate a broad spectrum of high-solid and liquid organic waste streams with high total solids (TS) and chemical oxygen demand (COD):

  • Livestock & Poultry Manure: Dairy manure, cattle slurry, swine manure, and poultry droppings.
  • Agricultural Residues: Crop straw, silage, corn stover, bagasse, and crop processing discards.
  • Food & Municipal Organic Waste: Kitchen waste, restaurant grease trap waste, fruit and vegetable market rejects, and food processing effluents.
  • Industrial & Agro-Industrial Wastewater: Slaughterhouse effluent, distillery/brewery slops, palm oil mill effluent (POME), starch wastewater, and dairy processing washwater.
  • Sewage & Municipal Sludge: Dewatered primary and secondary sludge from municipal WWTPs.

Feedstock Flexibility: High-rate biodegradation across TS 3% ~ 15% with optimized solids retention.

Biogas Digester Tank

Parameter Compact Series (10∼150 m³) Industrial Series (200∼10,000 m³)
Digester Capacity 10,20,30,50,80,100,150 m³ 200,500,1,000,3,000,5,000,10,000 m³
Tank Material GFS / Epoxy Carbon Steel / SS304 Glass-Fused-to-Steel (GFS Bolted Panels)
Operating Temperature Mesophilic (35–38∘C) / Thermophilic Mesophilic (35–38∘C) / Thermophilic
Working Pressure +1.5∼+3.0 kPa +2.0∼+5.0 kPa
Mixing Type Top Vertical / Side-Mounted Mechanical Multi-point Side-Entry / Jet / Top Agitators
Methane Concentration 55%∼70% CH4 55%∼70% CH4
Installation Time 3∼7 Days 15∼30 Days

3. Modular System Components & Equipment Architecture

Every biogas digester tank is engineered as a fully integrated, turnkey anaerobic system:

Biogas Digester Tank

  1. High-Performance Digester Shell:
    • Manufactured with precision Glass-Fused-to-Steel (GFS) panels or epoxy-coated titanium alloy plates.
    • High-tensile self-locking bolts fitted with corrosion-proof UV/H2S resistant protective caps.
  2. Double-Membrane Flexible Gas Holder Roof:
    • Ultra-durable, flame-retardant PVDF/PVC membrane storing biogas at constant positive pressure (1.5∼3.0 kPa).
    • Integrated blowers and air-safety relief devices maintain optimal membrane tension.
  3. Heavy-Duty Mixing & Agitation System:
    • Specialized side-entry or top-mounted helical-blade agitators prevent crust/scum layer formation and bottom sedimentation, ensuring uniform temperature and nutrient distribution.
  4. Thermal Regulation & Insulation System:
    • Built-in 304/316 stainless steel internal heating coils or external sludge heat exchangers powered by boiler/CHP waste heat.
    • Exterior insulation layer (50∼100 mm high-density rock wool or PU foam) clad in profiled aluminum/color steel sheeting.
  5. Safety, Metering & Automation:
    • Explosion-proof mechanical positive/negative pressure relief valves and inline flame arresters.
    • Integrated PLC instrumentation: continuous pH, temperature, methane content (CH4), liquid level sensors, and automated feeding/discharge pumps.

4. Process & Biological Operating Principle of Biogas Digester Tank

The biogas digester tank utilizes continuous microbiological degradation under strictly controlled anaerobic conditions:

Anaerobic Digestion Process Breakdown:

1. Hydrolysis: Complex particulate organic matter (polysaccharides, proteins, lipids) is solubilized by extracellular hydrolytic enzymes into simple, soluble monomers such as glucose, amino acids, and fatty acids.

2. Acidogenesis: Acid-forming fermentative bacteria absorb these soluble monomers and convert them into volatile fatty acids (VFAs like propionate and butyrate), alcohols, and lactic acid.

3. Acetogenesis: Acetogenic bacteria oxidize the intermediate VFAs and alcohols into key direct precursors: acetic acid, carbon dioxide (CO2), and hydrogen (H2).

4. Methanogenesis: Highly specialized anaerobic methanogens convert acetic acid (acetotrophic pathway) and H2/CO2 (hydrogenotrophic pathway) into high-energy biogas (55%–70% CH4) alongside stabilized, nutrient-dense digestate (bio-fertilizer).

  • Temperature Stability: Operates in Mesophilic (35∘C∼38∘C) or Thermophilic (50∘C∼55∘C) regimes with automated thermal feedback loop (±1∘C tolerance).
  • Controlled Hydraulic Retention Time (HRT): Optimized between 15∼30 days depending on solids concentration to achieve organic degradation rates exceeding 85%.
  • High Volumetric Gas Production: Delivers consistent yields of 0.8∼2.5 m³ biogas/(m³ effective volume⋅day).

Biogas Digester Tank

5. Key Advantages & Competitive Benefits of Biogas Digester Tank

  • Superior Corrosion & Chemical Resistance: The glass-fused enamel layer is inert to acids, alkalis (pH 1∼14), and highly corrosive H2S gases, guaranteeing a design service life of over 30 years.
  • Flexible Modular Sizing (10 m³ to 10,000 m³): From pre-assembled plug-and-play skid units for small farms to large-scale bolted field installations, capacity expansion and relocation are simple and cost-effective.
  • Rapid Deployment & Low Civil Construction Cost: Prefabricated factory panels assemble quickly on-site with standard bolted connections—reducing installation time by over 60% compared to cast-in-place concrete digesters.
  • High Energy Yield & Minimal Parasitic Load: Low-energy fluid dynamic mixing designs coupled with high-efficiency thermal insulation minimize internal electricity and heat consumption.
  • Dual Value Output (Energy + Organic Fertilizer): Generates green power/biomethane while yielding high-grade liquid digestate and solid bio-organic fertilizer, turning compliance costs into recurring revenue streams.

7. Ready to Turn Your Organic Waste into Clean Energy?

Get a customized engineering design and cost quotation for your facility today.

Biogas Digester Tank

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