pH automatic dosing adjustment equipment

Automatic pH dosing system | Precise, intelligent, and durable water pH balancing solution

This equipment is specifically designed for industrial, environmental, and water treatment applications. It can automatically add acid or alkali to water to achieve precise pH control. The system integrates an online pH monitor, a corrosion-resistant dosing pump, a large-capacity dosing tank, and a high-efficiency mixer, forming a complete, stable, and easy-to-maintain closed-loop control system.

core components

High-precision pH meter: Real-time water quality monitoring, rapid response, stable measurement, with upper and lower limit alarms and 4-20mA output.

Corrosion-resistant dosing pump: Made of PTFE/PP material, suitable for acids, alkalis, sodium hypochlorite, and other solutions; adjustable flow rate and accurate metering.

Dosing tank with agitator: PE or PP tank body, equipped with a top-mounted agitator to ensure complete dissolution and uniform mixing of powders or high-concentration solutions, preventing sedimentation.

Intelligent control box: PLC or dedicated pH controller, supporting PID adjustment, automatic start/stop of the dosing pump and agitator, and manual/automatic switching.

Working principle

The pH meter continuously monitors the pH value of the water. When the measured value deviates from the set range (e.g., <6.5 or >8.5), the controller automatically starts the acid or alkali pump, while the agitator ensures uniform concentration of the chemical solution in the tank. The system stops after the pH returns to the set range, requiring no manual intervention throughout the process.

Main advantages

High degree of automation: 24-hour continuous operation, reducing manual inspection and dosing.

Precise dosing: Closed-loop control based on real-time feedback avoids overdosing or underdosing.

Strong adaptability: Can treat various water bodies such as electroplating wastewater, chemical circulating water, domestic sewage, swimming pools, and cooling towers.

Durable materials: Both the pump head and tank are resistant to acid and alkali corrosion, suitable for long-term dosing of hydrochloric acid, sulfuric acid, sodium hydroxide, etc.

Easy maintenance: Modular design, quick-disconnect pipe interfaces, and convenient mixer maintenance.

Technical parameters

pH measurement range: 0 – 14

Control accuracy: ±0.1 pH

Maximum flow rate of dosing pump: 3 – 120 L/H (optional)

Dosing tank capacity: 100L – 2000L (customizable)

Agitator power: 0.37 – 2.2 kW

Power supply: Customizable upon request

Application areas

Industrial wastewater treatment (electroplating, chemical, printing and dyeing, pharmaceutical)

Circulating cooling water systems

Municipal sewage treatment plants

Swimming pool and landscape water pH adjustment

Reverse osmosis pretreatment

We can provide complete selection and piping design support based on your water quality parameters, flow rate, and reagent type. Welcome to send us your technical needs for consultation.

Company Profile

AA SS AQUA HITECH CO., LTD. was established in 2005 in Shenzhen, China. It is a leading technology enterprise specialized in the design, manufacturing, installation, commissioning and maintenance of technical solutions for high-difficulty industrial wastewater treatment projects.

Since its establishment, the company has been fully committed to the research of treatment technologies for high-difficulty and refractory industrial wastewater, wastewater recycling and reuse technologies, and wastewater zero-discharge technologies. It strives to achieve low project costs, high outputs and optimization of total social resources.

The water treatment technology solutions and achievements developed by the company have been widely applied in multiple fields of high-difficulty and refractory organic wastewater treatment, including pharmaceutical wastewater, chemical wastewater, pesticide wastewater, laboratory wastewater, coal chemical wastewater, petrochemical wastewater, breeding wastewater, slaughterhouse wastewater, semiconductor wastewater, printing and dyeing wastewater, coating wastewater, landfill leachate, food processing wastewater, mechanical processing wastewater and domestic wastewater.

Adhering to the business philosophy of leading technology, first-class quality and sustainable service, the company endeavors to provide customers with strong technical support and realize the sustainable development and utilization of water resources.

The electrochemical wastewater treatment equipment independently developed and invented by our company can achieve a removal rate of over 99% for COD and ammonia nitrogen in refractory industrial organic wastewater featuring high salinity, high toxicity, high concentration and strong acidity or alkalinity. It has solved the long-standing problem of high-difficulty and complex wastewater treatment in the industrial wastewater treatment industry, representing a significant breakthrough in the treatment scope, methods and effects of high-difficulty and complex industrial wastewater.

CQDHX SERIES EO Electrochemical Advanced Oxidation Technology

Cutting-edge Electrode Manufacturing Technology

Over a 15-year period starting from 2010, we have been dedicated exclusively to the R&D, manufacturing and application of electrodes. Having completed more than 3,000 verification tests on electrode materials and manufacturing processes, as well as over 5,000 experiments on different types of highly complex wastewater, we have tailored the compositions of electrode substrates, surface materials and the deposition conditions of electrode surfaces by integrating the characteristics of various highly complex wastewater types. This has enabled us to achieve optimal performance in treating different categories of highly complex wastewater.

The CQDHX Series Electrode Modules are capable of meeting the requirements for treating highly complex industrial wastewater under extreme conditions. They can effectively remove organic matter (COD), ammonia nitrogen, toxic substances, bacteria, chromaticity, phosphorus and various heavy metals from refractory industrial organic wastewater characterized by high salinity, high toxicity, high concentration and strong acidity or alkalinity.

Working Mechanism of CQDHX SERIES EO Electrode Modules

Electrochemical oxidation is a technology that utilizes an applied electric field to drive chemical reactions for pollutant degradation. Its core reaction occurs at the anode of the electrolytic cell, and the operating mechanisms are primarily categorized into two types: direct oxidation and indirect oxidation, which often function synergistically.

Direct Oxidation Mechanism: Pollutant molecules migrate to and adsorb onto the anode surface. Subsequently, the anode, acting as an electron acceptor, directly extracts electrons from the pollutant molecules, causing their oxidative decomposition. This process is controlled by the mass transfer rate and relies on the catalytic activity and adsorption properties of the anode material, exhibiting a certain degree of selectivity towards different pollutants.

Mechanism of Indirect Oxidation: The anode does not directly oxidize pollutants. Instead, it generates highly oxidizing agents by electrolyzing components within the solution. These agents then diffuse into the bulk solution and carry out homogeneous oxidation of the pollutants. Depending on the type of oxidants generated, the main pathways can be categorized as follows:

Electrochemical oxidation achieves pollutant degradation through two main mechanisms: electron transfer at the anode surface and the in-situ generation of highly oxidizing species. In practical applications, particularly for complex wastewater systems, direct and indirect oxidation often work synergistically. By optimizing electrode materials and process parameters, efficient and advanced treatment of organic pollutants can be achieved.

 Technical Advantages

High Salinity Tolerance: It can effectively remove COD and ammonia nitrogen from unsaturated saline wastewater with a removal rate of up to 99%.

High Toxicity Tolerance: It can effectively remove COD and ammonia nitrogen from highly biotoxic wastewater with a removal rate of up to 99%, while efficiently eliminating the biological toxicity of the wastewater.

High Concentration Tolerance: It can effectively remove COD and ammonia nitrogen from high-concentration organic industrial wastewater with a COD level of ≤ 450,000 mg/L, achieving a removal rate of up to 99%.

Strong Acid-Alkali Tolerance: It can effectively remove COD and ammonia nitrogen from strongly acidic or alkaline wastewater with a pH value ranging from 1 to 11, with a removal rate of up to 99%.

High Safety: The equipment operates at a DC voltage ranging from 3 to 15V, causing no harm to the human body.

No chemical agents are added during wastewater treatment, and no residues or solid wastes are generated.

The electrode modules operate without scaling or clogging.

The equipment achieves a removal rate of 75–100% for high ammonia nitrogen, cyanide breakdown, decolorization, and other pollutants.

No pH adjustment is required for incoming wastewater, which significantly saves on acids, alkalis, labor costs, and floor space, while avoiding secondary pollution.

No water dilution is needed to reduce the salinity of incoming wastewater, decreasing the system’s treatment load and conserving resources.

No water dilution is needed to reduce the COD concentration of incoming wastewater, decreasing the system’s treatment load and conserving resources.

The equipment features a small footprint, occupying approximately 2% of the floor space required by traditional processes of the same capacity.

The equipment has no special environmental requirements and can be installed in well-ventilated, rainproof, non-explosion-proof areas.

The equipment operates with no noise and zero discharge of secondary pollutants.

It features fully automated operation, which is simple, safe, and does not require on-site personnel monitoring.

Equipment Specifications: 0.5T–1000T/h

Electrochemical Oxidation Equipment for Treating Common Pollutants

Application Scenarios:

Treatment of Refractory and Toxic Pharmaceutical Wastewater

Treatment of Refractory and Toxic Chemical Industry Wastewater

Treatment of Refractory and Toxic Pesticide Wastewater

Treatment of Refractory and Toxic Laboratory Wastewater

Treatment of Refractory and Toxic Coal Chemical Industry Wastewater

Treatment of Refractory and Toxic Petrochemical Wastewater

Treatment of Aquaculture Wastewater

Treatment of Slaughterhouse Wastewater

Treatment of Refractory and Toxic Semiconductor Industry Wastewater

Treatment of Refractory and Toxic Dyeing Wastewater

Treatment of Refractory and Toxic Painting/Paint Coating Wastewater

Treatment of Refractory and Toxic Landfill Leachate

Treatment of Food Processing Wastewater

Treatment of Refractory Machining Wastewater

Treatment of Domestic Sewage