Key Specifications

Optional Features and Upgrades

Automatic aeration-control module, sludge-return pump system, online ORP/DO monitoring, sludge-dewatering unit, odor-control unit, intelligent remote cloud monitoring, and post-treatment disinfection module.

System Overview and Application Scenarios

Product Overview

The BHP A/O biochemical treatment system is a mature biological process widely adopted for organic wastewater treatment. It combines anaerobic and aerobic microbial activity to decompose organic pollutants and remove nitrogen compounds, delivering stable, compliant effluent suitable for municipal and industrial applications requiring COD and nitrogen removal. As a proven integrated STP system, it provides reliable biological treatment for diverse wastewater streams with consistent performance and operational stability.

Treatment Process and System Design

The BHP A/O biochemical treatment system is a standardized, proven approach for treating wastewater with high organic content. The complete process integrates three distinct biological stages: anaerobic hydrolysis, anoxic denitrification, and aerobic oxidation, each optimized for specific pollutant reduction objectives. This integrated STP system configuration ensures efficient removal of both carbonaceous and nitrogenous pollutants in a single treatment train.

In the anaerobic tank, complex, recalcitrant organic molecules are hydrolyzed into smaller, more biodegradable compounds, improving treatability. The anoxic tank enables heterotrophic denitrification, reducing total nitrogen without additional carbon input. The aerobic tank supplies dissolved oxygen to promote aerobic oxidation of COD and ammonia nitrogen by autotrophic and heterotrophic microorganisms. Following secondary clarification, settled sludge is recycled upstream to maintain stable mixed-liquor suspended solids (MLSS) concentration and consistent microbial population dynamics. This industrial wastewater COD removal and nitrogen removal equipment is designed for long-term reliability under variable operating conditions.

The BHP A/O biochemical treatment system exhibits strong resilience to shock loads, requires minimal external energy, and generates low excess sludge volumes compared to conventional activated-sludge designs. It operates reliably under variable influent quality and flow conditions and integrates seamlessly with upstream pretreatment stages—dissolved air flotation (DAF) units, sedimentation tanks, and chemical coagulation systems—to establish a complete, multi-barrier wastewater treatment train. As a comprehensive integrated STP system, it delivers consistent effluent quality suitable for discharge or further polishing.

Core Advantages

1. Efficient Organic & Nitrogen Removal

The integrated anaerobic-anoxic-aerobic configuration simultaneously removes COD, BOD, and ammonia nitrogen in a single, compact system, ensuring effluent compliance with international discharge standards and enabling direct reuse or safe environmental release. This nitrogen removal equipment achieves ≥90% COD reduction and ≥95% ammonia nitrogen removal under standard operating conditions.

2. Strong Shock-Load Resistance

The compartmentalized tank design acts as a hydraulic and organic buffer, absorbing sudden spikes in influent quality and pollutant concentration without process upset or biomass washout. The BHP A/O biochemical treatment system maintains stable performance even with variable feed characteristics common in industrial wastewater COD removal applications.

3. Energy Efficiency and Low Operating Cost

High-efficiency fine-bubble aeration technology minimizes blower power demand, while automatic turn-flow and aeration sequencing reduce both electricity consumption and manual labor requirements, lowering per-unit treatment cost and sludge-disposal expenses. This integrated STP system is designed for economical long-term operation.

4. Stable Microbial System

An optimized sludge-return system maintains balanced MLSS and diverse microbial activity, ensuring stable long-term treatment performance without frequent biomass reseeding or bioaugmentation interventions. The nitrogen removal equipment sustains consistent biological activity under normal operating conditions.

5. Fully Automatic Unattended Operation

The integrated PLC automatically optimizes aeration rate, return-sludge flow, and excess-sludge wasting based on real-time water-quality feedback, with continuous monitoring and predictive fault alarming to prevent process failure and unplanned downtime. This BHP A/O biochemical treatment system is designed for 24-hour unattended operation.

6. Flexible, Customized Design

Available in both factory-built skid-mounted configurations for rapid deployment and custom-engineered concrete tank designs, accommodating decentralized systems serving small communities and large centralized treatment plants in industrial zones. The integrated STP system can be scaled to match specific flow and load requirements.

Application Industries and Use Cases

1. Domestic Wastewater Treatment

Decentralized domestic wastewater treatment for residential communities, hospitality venues, construction camps, educational institutions, and healthcare facilities. The BHP A/O biochemical treatment system delivers reliable performance for municipal-type wastewater streams.

2. Food Processing and Slaughterhouses

Treatment of high-strength organic wastewater containing fats, proteins, and carbohydrates from food-processing plants and slaughterhouses requiring efficient BOD and COD reduction. This industrial wastewater COD removal application benefits from the system's robust biological degradation capacity.

3. Textile Printing and Dyeing

Treatment of textile printing and dyeing wastewater to reduce color intensity and chemical oxygen demand, achieving discharge compliance without secondary treatment. The integrated STP system effectively handles the variable organic loads characteristic of textile operations.

4. Chemical and Pharmaceutical Industry

Pretreatment of biodegradable wastewater from chemical-intermediate manufacturing to reduce pollutant load on downstream advanced-treatment equipment such as membrane filtration systems. The nitrogen removal equipment addresses both organic and nitrogenous pollutants in pharmaceutical waste streams.

5. Livestock and Poultry Wastewater Treatment

Removal of ammonia nitrogen and organic pollutants from livestock and poultry farming operations, reducing eutrophication risk in receiving waters. The BHP A/O biochemical treatment system provides effective treatment for high-strength agricultural wastewater.

6. Centralized Wastewater Treatment Plants in Industrial Parks

Serves as the core biological treatment unit in comprehensive wastewater treatment plants handling mixed organic industrial wastewater from multiple tenant industries. This integrated STP system delivers consistent performance across diverse influent compositions.

Compatible Treatment Systems and Integration

The BHP A/O biochemical treatment system fully integrates with BHP dissolved air flotation (DAF) units, sedimentation tanks, chemical-dosing pretreatment equipment, ultrafiltration (UF) modules, and reclaimed-water reuse systems, enabling complete end-to-end solutions for organic wastewater treatment, nitrogen removal, and water recycling in industrial and municipal applications. This nitrogen removal equipment serves as the biological core of comprehensive integrated STP system solutions, providing reliable performance for industrial wastewater COD removal and nutrient reduction.