Description

A Stainless Steel Bolted Tank is a high-performance, modular container constructed from pre-formed stainless steel panels that are bolted together on-site with high-strength bolts and specialized sealing technology. In the wastewater treatment sector, it serves not only as a simple liquid storage vessel but also as an efficient and reliable vessel for anaerobic biological reactors. Its core core value lies in offering a more flexible, corrosion-resistant, and rapidly deployable solution compared to traditional concrete tanks or coated carbon carbon steel tanks. For extreme corrosive environments, an enhanced option of a spray-applied and sintered epoxy resin coating on the interior walls is available, providing a dual-protection system. This makes it particularly suitable for modern decentralized wastewater treatment, industrial effluent processing, and resource recovery projects.

Features

• Modular Bolted Design: The tank is assembled from standardized, factory-prefabricated panels on-site, allowing for rapid construction and overcoming transportation size limitations.
• Premium Stainless Steel Material & Enhanced Coating:
  • Base material is typically 304 or 316L stainless steel, providing reliable corrosion resistance.
  • Enhanced Option: For highly acidic wastewater, high-salinity brines, or special effluents containing specific organic solvents, a professional-grade epoxy coating can be spray-applied and sintered onto the stainless steel interior. This forms a robust, dense, and chemically inert barrier, offering superior corrosion resistance beyond standard stainless steel.
• High-Strength Bolting & Sealing System: High-tensile bolts ensure structural integrity, while specialized sealing gaskets or strips guarantee a leak-proof tank throughout its entire service life.
• Exceptional Structural Strength: Panels are designed with reinforcing ribs to withstand full hydraulic load, wind load, snow load, and internal pressure generated during anaerobic processes.
• High Customizability: Capacity, diameter, and height can be flexibly adjusted according to project needs. Nozzles and openings can be pre-punched or added later for easy piping connection and installation of internal components like mixers, packing media, and heating coils.
• Smooth Interior & Exterior Surfaces: The smooth surface (whether stainless steel or epoxy-coated) prevents scaling and sludge buildup, facilitates easy cleaning and maintenance, and promotes uniform distribution and flow of anaerobic sludge.
• Long Service Life: Thanks to the inherent properties of stainless steel combined with the optional enhanced coating, the tank offers a service life far exceeding that of coated carbon steel tanks, potentially lasting over 30 years in demanding wastewater environments.

Advantages

• Rapid Deployment & Short Lead Time: Compared to the months required for casting and curing concrete, bolted tanks can be installed on-site in a matter of days or weeks, significantly accelerating project timelines and reducing costs.
• Unmatched Corrosion Resistance & Durability:
  • Base Advantage: Stainless steel material effectively resists corrosion from typical wastewater.
  • Key Enhanced Advantage: The addition of the epoxy coating allows the tank to handle “problematic wastewater” with wide pH fluctuations, high chloride concentrations, hydrogen sulfide, and other highly corrosive components, vastly expanding its application scope and providing an ultimate solution for special industrial effluents.
• Flexible Expansion & Relocation: The modular design allows for easy disassembly, capacity expansion, or complete relocation to a new site, offering unparalleled flexibility for future business growth or plant layout changes.
• Ideal for High-Efficiency Anaerobic Reactors:
  • Excellent Gas Tightness: Creates a perfect sealed environment for anaerobic digestion and methane production, ensuring high biogas collection efficiency.
  • High Reaction Efficiency: The smooth interior wall (stainless or epoxy-coated) and flexible internal configuration ensure optimal hydraulic conditions, enhancing COD removal rate and biogas production.
  • Strong Environmental Resilience: The epoxy coating effectively protects the tank from corrosion caused by acidic metabolites like hydrogen sulfide produced during anaerobic processes, ensuring the long-term structural safety and stability of the reactor.
• High Cost-Effectiveness: While the material cost per unit may be higher than concrete, the rapid installation, minimal maintenance requirements, and long service life result in a superior overall Return on Investment (ROI).
• Environmental Sustainability & Hygiene: Stainless steel is 100% recyclable, and the epoxy coating meets sanitary standards, making it an environmentally conscious choice.
• Suitable for Complex Terrains: The advantage of transporting and assembling small, modular components is particularly evident in areas with difficult access or limited space.

Application

In the field of wastewater treatment, Stainless Steel Bolted Tanks are primarily used in the following scenarios:

Industrial Wastewater Treatment & Storage:

• Storage and equalization of various industrial effluents, particularly highly corrosive streams such as pickling acids, chemical, and pharmaceutical wastewater (benefiting from the epoxy coating option).
• Serving as the core tank for anaerobic reactors (e.g., UASB, IC, EGSB) to pre-treat high-strength organic wastewater and recover biogas energy.

Municipal & Decentralized Rural Wastewater Treatment:

• Used as equalization tanks, intermediate water tanks, or final effluent storage tanks in small to medium-sized treatment plants and satellite facilities.
• Functioning as anaerobic digesters for treating municipal sludge or food waste, enabling sludge stabilization and energy recovery.

Biogas Projects:

• Acting as the core anaerobic fermentation tank for agricultural waste (livestock manure) and organic waste, producing biogas.

Emergency & Temporary Wastewater Treatment Projects:

• Rapid deployment for wastewater collection and treatment in environmental emergencies or temporary construction camps.

Water & Chemical Storage:

• Storage of treated reclaimed water, fresh water, and chemicals used in the treatment process (e.g., acids, alkalis, flocculants).

Summary:

The Stainless Steel Bolted Tank, with its core advantages of modularity, corrosion resistance, rapid construction, and long service life, is becoming an increasingly popular solution in wastewater treatment. The introduction of the epoxy coating enhancement successfully overcomes material limitations, empowering clients to tackle the most challenging wastewater streams. It perfectly balances the dual functions of “storage” and “advanced biological reaction,” especially as an anaerobic reactor, helping clients efficiently achieve multiple goals: pollution control, energy recovery, and cost management.