BIOLOGICAL TREATMENT

NATURE-BASED BIOLOGICAL WASTEWATER EFFICIENCY FOR MODERN INDUSTRY

Biological wastewater treatment is one of the most effective, sustainable, and cost-efficient solutions for industries dealing with complex, organic-rich effluents. WaterNext designs and builds advanced biological wastewater treatment plants exclusively for industrial applications, using aerobic and anaerobic technologies to deliver reliable performance, low operational costs, and full regulatory compliance. Through biological wastewater treatment, industries can achieve significant reductions in pollutant levels while maintaining compliance with environmental regulations.

WaterNext systems are designed to serve a variety of industrial sectors, including textile, food & beverage, and chemical industries. Thanks to a modular and scalable engineering approach, our solutions are easily integrated into both existing and new facilities, optimizing performance to meet the specific needs of each client.

IMPORTANCE OF BIOLOGICAL WASTEWATER TREATMENT FOR SUSTAINABLE INDUSTRIES

Another vital aspect of biological wastewater treatment is its adaptability to different types of wastewater, making it suitable for a variety of industrial applications.

Biological treatment harnesses the metabolic activity of microorganisms to degrade organic matter in wastewater. These microorganisms – including bacteria, protozoa, amoebae, and rotifers – feed on the organic compounds present in the effluent, converting them into harmless by-products such as carbon dioxide, water, and new microbial cells. The process occurs in biological reactors designed to maintain optimal conditions for oxygen, temperature, and mixing.

One of the most widely used approaches is the activated sludge process, which relies on a suspended population of microorganisms in an aeration tank. There, the microorganisms metabolize biodegradable substances and form biological flocs that can be easily separated from the treated water in the settling phase.

Implementing biological wastewater treatment can also enhance the sustainability profile of businesses, aligning them with green initiatives and reducing their carbon footprint.

The effectiveness of biological wastewater treatment processes is not only measured by their removal efficiencies but also by their overall impact on operational costs.

Maintaining the balance of microorganisms is essential for the success of biological wastewater treatment and enhances the system’s ability to handle fluctuations in organic load.

In addition to aerobic systems, WaterNext also employs anaerobic technologies to treat high-strength industrial effluents. Anaerobic processes, carried out in the absence of oxygen, allow for high removal efficiencies and often result in the production of biogas that can be used as a renewable energy source.

HOW THE ACTIVATED SLUDGE PROCESS WORKS

At the core of aerobic systems lies the aeration tank, where a carefully controlled balance is maintained between microorganisms and organic matter. Dissolved oxygen is supplied via mechanical or fine-bubble aeration systems, creating an environment that promotes microbial growth and effective degradation of pollutants.

During the treatment process, microorganisms consume the organic compounds and form biological flocs. Once these flocs reach sufficient size and density, they settle rapidly in secondary clarifiers. This enables a clear separation between the treated water and the biomass, which can be either recirculated back into the system or removed for further handling.

Furthermore, advancements in technology continue to improve the efficiency of biological wastewater treatment systems, making them more effective and reliable.

The activated sludge process offers high removal efficiencies for COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), TSS (Total Suspended Solids), and nutrients. The resulting effluent is clear, compliant with discharge limits, and often suitable for internal industrial reuse.

The benefits associated with biological wastewater treatment also extend to regulatory compliance, ensuring that industries meet environmental standards.

THE ROLE OF OXYGEN IN BIOLOGICAL TREATMENT

Oxygen plays a critical role in aerobic biological treatment. It enables aerobic bacteria to carry out the biochemical reactions required for organic matter degradation. Without a proper supply of oxygen, microbial activity slows down and the treatment efficiency is compromised.

WaterNext systems are designed to ensure continuous and uniform oxygenation, using high-efficiency aeration technologies. This guarantees process stability, optimal biomass growth, and consistent effluent quality.

BENEFITS OF 100% BIOLOGICAL TREATMENT FOR INDUSTRY

Implementing a fully biological treatment system offers several advantages over traditional chemical-physical methods. The key benefits include:

• Low operating costs: Biological systems have lower energy consumption and eliminate the routine use of expensive chemical reagents. Treatment costs can be as low as €0.10 per cubic meter;
• Minimal sludge production: Compared to chemical processes, biological systems generate significantly less sludge, and the sludge produced is non-toxic and easier to manage;
• Low environmental impact: The absence of chemical additives reduces the risk of secondary contamination and improves the environmental performance of the plant;
• Automation and reliability: Intelligent control systems regulate aeration and biomass activity, minimizing operator intervention and ensuring consistent performance;
• High removal efficiency: Biological systems are effective at removing organic pollutants, nutrients, and suspended solids, producing a clear and stable effluent;
• Water reuse potential: In many cases, the treated water can be reused for internal industrial purposes such as washing, cooling, or process make-up, contributing to water savings and reuse strategies;

TAILORED SOLUTIONS FOR INDUSTRIAL BIOLOGICAL TREATMENT

WaterNext systems are designed to ensure continuous and uniform oxygenation, using high-efficiency aeration technologies. This guarantees process stability, optimal biomass growth, and consistent effluent quality.

By investing in biological wastewater treatment, industries can achieve both operational efficiency and environmental stewardship.

Industries served include:

• Textile and dyeing plants;
• Food and beverage production;
• Chemical manufacturing;
• Other sectors generating high-organic-load effluents.

Each project is custom-engineered based on the specific characteristics of the wastewater, operational targets, and local regulatory requirements. WaterNext oversees every stage of implementation, from design to commissioning, remote monitoring, and long-term optimization.

Through continuous optimization, WaterNext ensures that the biological wastewater treatment processes remain effective and economically viable.