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CSTR Anaerobic Reactor Tank for Waste Treatment - Leading China Suppliers and Factory Solutions

The CSTR (Completely Stirred Tank Reactor) is an ideal solution for effectively managing organic wastewater and organic solid waste slurries with high suspended solids, elevated concentrations, and increased viscosity. This state-of-the-art reactor, produced by our reputable China factory, is designed to accommodate significant amounts of solid particles while maintaining optimal performance. Featuring a robust enamel tank, it guarantees excellent overall rigidity and structural strength through its assembled design. The smooth, wear-resistant inner wall minimizes material adhesion, ensuring efficient operations. As a leading supplier of CSTR anaerobic reactors, we are committed to delivering high-quality products tailored to meet the demands of various industrial applications.

Product Details

Description

CSTR (Completely Stirred Tank Reactor) is most suitable for treating organic wastewater and organic solid waste slurries that have high suspended solids, high concentration, high viscosity, or contain a significant amount of solid particles. The wastewater for CSTR requires high concentration of COD (Typically ≥3000 mg/L, with a typical range of 5000–30000 mg/L) and SS.

CSTR tanks require stirring, are highly corrosive, require biogas resistance, and are easy to maintain; enamel tanks are a perfect match.

The enamel tank is a kind of bolted storage tank made from two materials: glass and steel. High-strength TRS (titanium-rich steel) plates and enamels are perfectly fused at high temperatures to form a highly inert inorganic glaze layer. This coating system has excellent anti-corrosion properties and is the best choice for tank.

Material Characteristics of Glass-Fused-to-Steel / Enamel 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.

IC anaerobic digester For Food Wastewater Treatment Project

Specification

Coating thickness	250~450 um
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	500 KN/mm
Service life	More than 30 years

The Advantage of Enamel Tank for CSTR Anaerobic Digester

1

Extremely Corrosion Resistant
Suitable for complex anaerobic water conditions.
2

Suitable for CSTR Continuous Mechanical Mixing Conditions
CSTRs require full-tank mechanical agitation to prevent settling, crusting, and stratification. Enameled tanks offer excellent overall rigidity and high structural strength, resisting agitation vibrations and material erosion. Furthermore, the smooth inner wall of the tank prevents sludge and debris from adhering to the surface.
3

Tolerates Feeds with High Suspended Solids and High Solids Content
CSTR specializes in treating livestock and poultry manure, kitchen waste, sludge, and high-SS organic slurry. The enamel inner wall is wear-resistant, smooth, and non-stick, allowing high-solids materials to flow smoothly and preventing stagnation in corners.
4

Good Airtightness — Suitable for Biogas Collection in an Anaerobic Environment
CSTR anaerobic digesters require strict airtightness and gas collection to prevent leaks. Enameled tank assembly with sealing strips and flange seals ensures excellent overall airtightness.
5

Easy to Keep Warm and Maintain a Constant Temperature
Anaerobic reactions require a constant temperature of 35℃ for mesophilic reactions and 55℃ for hyperthermic reactions. The outer wall of the enamel-lined tank can be directly fitted with an insulation layer and an outer protective panel, simplifying the construction process.
6

Quick to Install, Modular, and Can Be Disassembled and Expanded in Different Locations
Enameled tanks are assembled from standardized sheet materials, resulting in a short on-site installation period. They can be expanded, relocated, and disassembled for reuse at any time.
7

Does Not Grow Biofilm — Easy to Clean and Maintain
The glaze is dense and smooth, making it difficult for bacteria and sludge to adhere.

CSTR Anaerobic Reaction Project

Size: Φ16.04–16.8 m | Volume: 3500 m³

The pH entering the CSTR reactor must be strictly controlled between 6 and 9, the internal temperature must be maintained at 35 ± 3℃ (temperature variation must not exceed 3℃/h), and TAC ≥ 1500. Other substances toxic or harmful to the biodegradation reaction are prohibited from entering.

Design gas production capacity of CSTR reactor: 800 m³/d, actual operating capacity: 1100 m³/d.

Frequently Asked Questions (FAQ)

What type of wastewater is CSTR most suitable for treating?

CSTR (Completely Stirred Tank Reactor) is most suitable for treating organic wastewater and organic solid waste slurries with high suspended solids, high concentration, high viscosity, or a significant amount of solid particles. It typically requires a COD concentration of ≥3000 mg/L, with a common range of 5000–30000 mg/L.

Why is an enamel (glass-fused-to-steel) tank the preferred choice for CSTR digesters?

Enamel tanks are ideal for CSTR applications because they offer extreme corrosion resistance, excellent airtightness for biogas collection, smooth non-stick inner walls, and high structural rigidity to withstand continuous mechanical agitation — all critical requirements for anaerobic digestion environments.

What is the expected service life of a glass-fused-to-steel enamel tank?

Glass-fused-to-steel enamel tanks are designed for durability, with a service life of more than 30 years under normal operating conditions. The high-strength TRS steel substrate and the fused inorganic glaze coating contribute to this long-term performance.

What pH range can enamel tanks withstand?

Standard grade enamel tanks can handle a pH range of 3 to 11, which covers most anaerobic digestion scenarios. For more aggressive chemical environments, a special grade coating is available that supports a full pH range of 1 to 14.

Can enamel tanks be expanded or relocated after installation?

Yes. Enamel tanks are assembled from standardized, modular sheet panels, which means they can be expanded in capacity, relocated to a new site, or fully disassembled and reused at any time. This flexibility significantly reduces long-term infrastructure costs.

What temperature conditions are required for CSTR anaerobic digestion?

CSTR anaerobic digestion typically requires a constant temperature of 35℃ for mesophilic reactions and 55℃ for thermophilic (hyperthermic) reactions. The outer wall of the enamel tank can be directly fitted with an insulation layer and protective panel to maintain stable operating temperatures efficiently.

CSTR Anaerobic Reactor Tank for Waste Treatment - Leading China Suppliers and Factory Solutions

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