Can Livestock Wastewater Make Biogas?

Yes — livestock wastewater is one of the best anaerobic digestion (AD) feedstocks because it is already a wet, high-strength slurry rich in soluble and readily hydrolyzed organics; pig and cattle manure water commonly yields biogas at 55–65% CH₄ via UASB or CSTR at mesophilic 35–38°C. The wastewater itself becomes the fuel.

Why Manure Water Is a Strong Feedstock

Manure water carries high COD/BOD (pig wastewater often COD ≥ 10,000 mg/L) and is already liquid, so no dilution or drying is needed. Its organics solubilize quickly, giving high volumetric gas rates. Co-digestion with crop residue can lift yield further while balancing C:N.

Which Reactor Suits It

High-rate systems dominate: UASB/EGSB for soluble, warm, high-strength streams (low sludge yield, recovers biogas, saves aeration), and CSTR for slurry with more suspended solids. The choice follows solids content and temperature more than animal type.

Biogas Yield and Energy

Anaerobic treatment of livestock wastewater removes 80–90% of COD while producing biogas; the gas can fire a boiler, run a CHP (35–45% electrical, 80–90% total efficiency), or be upgraded. The wastewater thus cuts both pollution and energy cost.

Technical Considerations

Manure water is corrosive and H₂S-rich; tankage needs an inert, H₂S-resistant lining (GFS glass fused at 820–930°C). Manage ammonia (inhibits at high concentration), size HRT (6–12 h for high-strength UASB; 15–30 days for wet CSTR), and plan sludge handling.

How to Scope a Livestock Biogas Project

Measure daily wastewater volume and COD, pick UASB or CSTR by solids, set mesophilic 35–38°C, size by COD load (anaerobic yield ≈ 0.30–0.45 m³ biogas per kg COD removed), and specify corrosion-rated tankage. Co-digest residue to raise yield if available.

Project Case Study

Beijing 5S Pig Farm Wastewater Treatment Project. A 580 m³/day pig farm plant using UASB + AOAO to treat manure wastewater, achieving COD ≥ 10,000 → ≤ 200 mg/L, ammonia-N ≥ 1,000 → ≤ 80 mg/L, total P ≥ 200 → ≤ 8 mg/L, and fecal coliforms ≥ 5.6×10⁶ → ≤ 4.0×10³ CFU/100ml — a documented livestock-wastewater-to-clean-water result with biogas potential.

About Center Enamel

Center Enamel demonstrates relevant project experience in livestock wastewater biogas, with delivered pig- and cattle-farm treatment plants such as the Beijing 5S pig farm UASB + AOAO project above. The company supplies bolted GFS tanks engineered for the corrosive, H₂S-rich manure-liquor duty — glass fused at 820–930°C — across farms in China and abroad.

Advantages and Limitations

Livestock wastewater makes reliable biogas and cuts pollution and energy cost. Limits: ammonia inhibition and H₂S corrosion must be designed for; and very high solids need CSTR rather than UASB. Modular GFS tanks speed farm deployment.

Comparison: UASB vs CSTR for Manure Water

Livestock wastewater is an excellent AD feedstock that makes biogas at 55–65% CH₄ via UASB or CSTR at 35–38°C, while cutting COD 80–90%. The Beijing pig farm shows COD ≥ 10,000 → ≤ 200 mg/L. Send your volume and COD and we will pick the reactor and size GFS tankage.

Frequently Asked Questions (FAQ)

Q1: Can livestock wastewater make biogas?
A: Yes — manure water is a strong AD feedstock; pig/cattle wastewater yields biogas via UASB or CSTR at 35–38°C.

Q2: Why is manure water good for AD?
A: It is already wet and high-strength (COD often ≥ 10,000 mg/L) with fast-solubilizing organics.

Q3: Which reactor suits it?
A: UASB/EGSB for soluble high-strength streams; CSTR for slurry with more solids.

Q4: How much biogas?
A: Anaerobic yield is about 0.30–0.45 m³ biogas per kg COD removed at 80–90% COD reduction.

Q5: What tank capacity is available?
A: GFS farm biogas tanks range 200 m³ to 60,000 m³.

Q6: What project experience exists?
A: Beijing 5S pig farm: 580 m³/day, UASB + AOAO, COD ≥10,000→≤200 mg/L.

Send your livestock wastewater volume and COD. We will select UASB or CSTR, size the digester, and quote corrosion-rated GFS tankage for your farm biogas project.