China’s Leading Wastewater Settling Tank Manufacturer:Center Enamel’s Glass-Fused-to-Steel Solutions for Sustainable Wastewater Management

China’s Leading Wastewater Settling Tank Manufacturer:Center Enamel’s Glass-Fused-to-Steel Solutions for Sustainable Wastewater Management

As the world intensifies efforts toward environmental protection and sustainable infrastructure, wastewater treatment has become a cornerstone of public health, industrial compliance, and ecological preservation. Central to any effective wastewater treatment system is the settling tank—a structure designed to separate solids from liquid, stabilize effluent quality, and prepare wastewater for further treatment or safe discharge.

Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) has emerged as China’s leading wastewater settling tank manufacturer, leveraging advanced Glass-Fused-to-Steel (GFS) tank technology to deliver world-class, durable, and highly efficient wastewater settling solutions. With decades of expertise, nearly 200 patented technologies, and projects completed in more than 100 countries, Center Enamel has become a trusted global partner for municipalities, industries, and environmental engineers.

Center Enamel: Innovating Water & Wastewater Infrastructure

Founded in 2008, Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a highly specialized manufacturer focused on the design, fabrication, and supply of bolted storage tanks. Over the years, the company has established itself as the foremost expert in Glass-Fused-to-Steel (GFS) technology—a transformative approach to tank construction that combines the mechanical strength of steel with the chemical resistance of glass.

Why Center Enamel Stands Out

First GFS tank manufacturer in China

The most experienced bolted tank manufacturer in Asia

Nearly 200 patented enameling technologies

Products certified to global standards (ISO, NSF/ANSI, CE/EN, WRAS, FM)

Export footprint in 100+ countries

Supported by a world-class R&D team and advanced manufacturing facilities

Center Enamel’s product range includes GFS tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks, and aluminum geodesic dome roofs—serving water, wastewater, industrial liquid, and agricultural storage sectors alike.

What is a Wastewater Settling Tank?

A wastewater settling tank (also known as a primary clarifier, sedimentation tank, or sludge settling tank) is a foundational unit in wastewater treatment systems. It allows suspended solids to settle under gravity, separating solids from liquids before biochemical treatment or discharge. The performance of these tanks directly impacts the effectiveness of downstream biological or chemical treatment processes.

High performance requires:

Corrosion resistance

Long-term structural stability

Smooth internal surfaces

Leak-proof containment

Minimal maintenance

Traditional materials such as concrete or painted steel often fail to meet these demands over time due to chemical attack, scaling, cracking, or coating degradation. This is where Glass-Fused-to-Steel technology transforms wastewater infrastructure.

Glass-Fused-to-Steel: The Superior Material for Wastewater Applications

Glass-Fused-to-Steel (GFS), also known as Glass-Lined Steel, is an advanced coating technology in which molten glass is fused to steel plates at high temperatures between 820°C–930°C. The result is a permanent inorganic bond that creates a seamless, smooth, and corrosion-resistant surface.

Key Performance Attributes

Outstanding corrosion resistance against acids, alkalis, and aggressive wastewater constituents

Gas and liquid impermeability to prevent leaks and environmental contamination

Inert, smooth, and non-porous surface ideal for settling operations

Enhanced abrasion resistance to withstand solids settlement

Long service life (≥30 years) with minimal maintenance

Chemically inert surface to prevent biological or algae growth

These properties make GFS tanks particularly suitable for wastewater settling tanks, where contact with suspended particles, biological matter, and corrosive influents is constant.

Technical Specifications of Center Enamel GFS Wastewater Settling Tanks

Parameter Specification

Coating Thickness 0.25–0.45 mm

Adhesion Strength ≥3450 N/cm²

Hardness 6.0 Mohs

Holiday Test Voltage 1500 V

pH Resistance Standard 3–11; Special 1–14

Permeability Gas & liquid impermeable

Surface Smooth, glossy, inert, anti-adhesion

Service Life ≥30 years

Tank Assembly Bolted modular design

Typical Colors Black Blue, Forest Green, Grey Olive, Cobalt Blue, Desert Tan

Center Enamel’s GFS tanks are designed to withstand continuous wastewater contact while maintaining structural integrity and excellent hydraulic performance.

Global Certifications and Compliance

Center Enamel’s wastewater settling tanks are engineered, tested, and manufactured in strict compliance with globally recognized standards:

AWWA D103-09 (American Water Works Association)

ISO 28765

NSF/ANSI 61 (where potable water contact is needed)

CE / EN1090 Certification

ISO 9001 Quality Management System

ISO 45001 Occupational Health and Safety

WRAS, FM, LFGB, BSCI

These certifications guarantee water quality safety, structural reliability, and international acceptability across municipal, industrial, and regulatory environments.

Key Advantages of GFS Wastewater Settling Tanks

1. Robust Corrosion Resistance

Wastewater contains dissolved oxygen, sulfides, chlorides, and acids that can rapidly degrade conventional concrete or painted steel tanks. GFS tanks resist these chemical attacks over decades, preserving integrity and performance.

2. Smooth Surface for Efficient Settling

The smooth, glass-lined interior reduces turbulence and promotes efficient sedimentation of suspended solids, improving clarifier performance and reducing sludge carry-over.

3. Minimal Maintenance, Long Lifecycle

By eliminating organic coatings, GFS tanks require little maintenance. The glass surface prevents biofilm adhesion, reducing cleaning frequency and operational disruption.

4. Leak-Free and Environmentally Safe

Glass-Fused-to-Steel coatings are impermeable to liquids and gases, ensuring zero leakage and protecting the surrounding environment—a critical requirement in wastewater management.

5. Modular Bolted Design

Factory-fabricated panels are assembled onsite, enabling rapid deployment, reduced labor costs, and flexibility for future expansion.

Typical Applications of GFS Wastewater Settling Tanks

Center Enamel’s GFS settling tanks are used in a broad array of scenarios:

Municipal Wastewater Treatment Plants

Separating primary solids before biological treatment in town or city systems.

Industrial Effluent Systems

Handling wastewater from food & beverage, textile, chemical, and paper industries prior to further processing.

Sludge Holding and Equalization Tanks

Providing temporary containment prior to digestion, dewatering, or disposal.

Combined Sewer Overflow (CSO) Infrastructure

Supporting surge containment and solids separation in wastewater networks.

Water Resource Recovery Facilities

Optimizing solids separation before secondary or tertiary stages.

Each application benefits from GFS technology’s corrosion resistance and hydraulic stability.

Global Project Experience

Center Enamel’s GFS wastewater settling tanks have been installed in operations across more than 100 countries, including:

United States & Canada

Reliable performance in cold climates and compliance with stringent environmental standards.

Australia & New Zealand

Adaptability to desert, coastal, and tropical wastewater conditions.

Middle East (UAE, Saudi Arabia)

Durability under high salinity, temperature, and heavy industrial demands.

Latin America (Brazil, Panama)

Integration in municipal and industrial water systems.

Africa & South Africa

Deployment in urban and rural wastewater infrastructure.

Southeast Asia (Malaysia, Indonesia)

Consistent operation in humid, coastal, and monsoon regions.

These installations demonstrate Center Enamel’s capacity to deliver tailored, site-specific solutions even in challenging environmental and operational conditions.

Comprehensive Solution Capabilities

Center Enamel provides not only tanks, but complete system solutions including:

Aluminum dome roofs and flat roofs

Manholes, flanges, and sampling ports

Level monitoring and instrumentation interfaces

Walkways, ladders, and safety platforms

Sealing systems and accessories

EPC (Engineering, Procurement, Construction) Technical Support

This end-to-end approach ensures projects are delivered on time, on budget, and to specification.

Manufacturing Excellence

Center Enamel operates a modern manufacturing base with over 150,000 m² of production facilities, including:

Precision enameling kilns

Automated forming and assembly lines

Quality testing laboratories

Smart factory integration systems

Innovation and R&D centers

Major milestones include:

Successfully producing the largest GFS tank in Asia (32,000 m³)

Fabricating the highest GFS tank at 34.8 meters

Breaking records for single tank volume (21,094 m³)

These achievements showcase Center Enamel’s engineering strength and capacity for large-scale infrastructure delivery.

Why Center Enamel Is China’s Leading Wastewater Settling Tank Manufacturer

1. Proven Technology Leadership

Center Enamel pioneered Glass-Fused-to-Steel technology in China and continues to set innovation benchmarks with patented enamel technologies.

2. Trusted Global Certifications

With ISO, NSF/ANSI, CE, WRAS, and other certifications, Center Enamel GFS tanks meet global regulatory requirements.

3. Broad Application Expertise

From municipal wastewater to industrial effluent and sludge processing, Center Enamel tanks serve a wide spectrum of water management needs.

4. Modular Construction Advantage

Bolted tanks allow flexible, rapid onsite assembly, reducing project risk and construction time.

5. Long Lifecycle and Low Total Cost of Ownership

GFS tanks deliver decades of maintenance-free operation, reducing operational costs and infrastructure replacement cycles.

6. Global Deployment and After-Sales Support

With installations on every continent, Center Enamel provides responsive technical support and local coordination for international clients.

Supporting Environmental Sustainability

Wastewater settling tanks play a vital role in protecting ecosystems and human health by preventing untreated effluent release. Center Enamel tanks support sustainability by:

Preventing corrosion and structural failures that cause leaks

Reducing chemical and cleaning waste

Enhancing solids separation efficiency

Facilitating downstream treatment effectiveness

Protecting groundwater and surface water resources

By addressing these areas, GFS tanks contribute to sustainable wastewater systems that meet regulatory and environmental goals.

Effluent solids separation is a critical first step in wastewater treatment, and the performance of settling tanks has far-reaching impacts on environmental protection, public health, and infrastructure resilience. Glass-Fused-to-Steel wastewater settling tanks from Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) offer a reliable, high-performance solution that combines corrosion resistance, structural durability, hydraulic effectiveness, and long-term service life.

As China’s leading wastewater settling tank manufacturer, Center Enamel delivers innovative technology, proven engineering excellence, international compliance, and global support—empowering wastewater treatment facilities everywhere to operate efficiently, sustainably, and confidently.