China Suppliers CSTR/USR Manure Treatment Tanks for Anaerobic Digestion - Factory Direct Biogas Solutions
Description
The commonly used materials for manure anaerobic tanks (biogas fermentation tanks) include glass-fused-to-steel (GFS) enamel steel plate, carbon steel with anti-corrosion coating, stainless steel, reinforced concrete, FRP/fiberglass, and HDPE geomembrane. The core requirements are resistance to organic acid and hydrogen sulfide corrosion, as well as good sealing and anti-seepage performance.
High moisture content and large amount of solid residues, easy to settle and form crust.
Perishable with strong odor, producing harmful gases such as ammonia and hydrogen sulfide.
Strong corrosivity from organic acid and hydrogen sulfide, requiring superior anti-corrosion tank materials.
The GFS enamel bolted tank is the mainstream preferred option due to its excellent corrosion resistance and high mechanical hardness.
Glass fused to steel is a permanent, molecular bond created by fusing a specially formulated silica-based glass enamel to a base sheet of steel at very high temperatures (around 820°C / 1500°F). It combines the advantages of both materials — the strength and flexibility of steel and the excellent anti-corrosion properties of glass.
Material Characteristics of Glass-Fused-to-Steel Tanks
- Low Carbon, High Strength, High Titanium.
The steel substrate employed in the construction of glass-fused-to-steel tanks is a special high-strength enamelled steel with a unique design and superior properties. Its mechanical properties, including yield strength, tensile strength, and elongation, far exceed those of conventional steel sheets.
Specification
| Coating thickness | 250~450um |
| pH range | Standard grade 3~11; Special grade 1~14 |
| Coating process | Standard 2 coats 2 fire; 3 coats 3 fire available |
| Hardness | 6.0 Mohs |
| Elasticity | 500KN/mm |
| Service life | More than 30 years |
Complete treatment process for livestock and poultry breeding wastewater (mainstream mature solution):
This process is stable and meets standards, requires moderate maintenance, and is used by the vast majority of pig and chicken farms.
Frequently Asked Questions (FAQ)
The commonly used materials include glass-fused-to-steel (GFS) enamel steel plates, carbon steel with anti-corrosion coatings, stainless steel, reinforced concrete, FRP/fiberglass, and HDPE geomembrane.
GFS tanks combine the structural strength of steel with the anti-corrosion properties of silica-based glass enamel, offering superior resistance to aggressive organic acids, hydrogen sulfide, and mechanical wear.
Standard grade GFS coatings support a pH range of 3 to 11 (special grades support pH 1 to 14), with a surface hardness rating of 6.0 Mohs.
With a coating thickness between 250~450um and multi-coat firing, GFS tanks offer a design service life of more than 30 years.
The mainstream mature process consists of: Pretreatment system + Enameled CSTR Anaerobic digestion + A²/O Biochemical treatment system + Coagulation and Sedimentation.