Automatic activated carbon filtration equipment

Automatic activated carbon filtration equipment | Fully automatic backwashing · Highly efficient removal of residual chlorine and organic matter

This equipment uses high-quality coconut shell activated carbon as the filtration and adsorption medium, coupled with a fully automatic multi-way valve or pneumatic/electric valve assembly, to achieve fully automatic "filtration-backwash-forward wash" cycle operation. When the activated carbon layer becomes saturated with contaminants, the inlet and outlet water pressure difference increases, or a set time is reached, the equipment automatically starts backwashing to flush away the trapped substances on the surface and inside of the carbon layer, restoring adsorption and filtration capacity. The equipment requires no manual operation and can efficiently remove residual chlorine, color, odor, some organic matter, and trace suspended solids from water, making it a key pretreatment or advanced treatment unit in water treatment systems. It is widely used in drinking water purification, RO pretreatment, swimming pools, circulating cooling water, greywater reuse, and waste gas scrubbing tower circulating water treatment, among other fields.

core components

Automatic Control Valve: Fully automatic multi-way valve (time/differential pressure dual control) or integrated pneumatic/electric butterfly valve assembly, with built-in PLC program, automatically switching between filtration, backwashing, forward washing, and drain positions.

Filter Tank: Vertical structure made of carbon steel with epoxy anti-corrosion coating, stainless steel 304/316L, or fiberglass (FRP), pressure resistant 0.6-1.0MPa.

Activated Carbon Media: Coconut shell activated carbon, high iodine value, high strength, large adsorption capacity, effectively removing residual chlorine (removal rate ≥99%), color, odor, and COD.

Water Distribution and Collection System: Upper claw-type water distributor, lower perforated plate + filter cap or collection pipe, ensuring uniform water flow distribution and preventing flow deviation and carbon particle leakage.

Pipeline System: Manual butterfly valve, sampling valve, pressure gauge, air vent valve, and drain port.

Electrical Control Box: Remote/local switching capability, supports communication and fault alarms.

Working principle

Filtration/Adsorption: Raw water enters the tank through a control valve and is evenly distributed on the activated carbon layer by a water distributor. The water flows downwards through the filter layer, where the activated carbon removes residual chlorine, organic matter, color, and odor through physical and chemical adsorption. The clean water is discharged through a bottom collection device.

Backwash: When the pressure differential reaches a set value or a timer is triggered, the control valve automatically switches to backwash mode. Water flows upwards into the tank, causing the activated carbon layer to expand, tumble, and rub against itself, washing away trapped impurities and fine carbon particles, which are then discharged through the drain port.

Forward Wash: After backwashing, forward washing occurs. The water flows downwards again to flush the carbon layer, recompacting the carbon bed and washing away residual impurities. The system then automatically returns to filtration mode. The entire process requires no manual intervention..

Main advantages

Fully Automatic Operation: No dedicated personnel required; automatic backwashing based on set time or pressure differential reduces operating costs.

High-Efficiency Adsorption: Residual chlorine removal rate ≥99%, color removal rate ≥90%, significantly reducing COD and odor.

Protecting Downstream Equipment: As a pretreatment for RO/EDI, it effectively prevents oxidizing substances from damaging the reverse osmosis membrane.

Coconut Shell Activated Carbon: High hardness, low ash content, and long service life (1-3 years), making it particularly suitable for drinking water.

Uninterrupted Water Supply: When dual or multiple tanks are connected in parallel, online backwashing is possible, with one tank backwashing the other.

Simple Maintenance: Top manhole facilitates inspection or addition of activated carbon; standard interfaces facilitate installation.

Technical parameters

Processing flow rate: 1 – 200 m³/h (single tank, multiple tanks can be connected in parallel)

Working pressure: 0.2 – 0.8 MPa

Design pressure: 1.0 MPa

Filtration velocity: 6 – 12 m/h (economic flow rate)

Activated carbon layer height: 800 – 1500 mm

Residual chlorine removal rate: ≥99%

Iodine value: ≥800 mg/g

Control method: Time-based / Differential pressure / Flow-based (optional)

Tank material: Carbon steel epoxy / Stainless steel 304/316L / FRP

Valve configuration: Automatic multi-way valve or pneumatic/electric butterfly valve assembly

Application areas

Drinking water treatment (village and town water plants, residential drinking water)

Reverse osmosis (RO) pretreatment (protecting membranes from residual chlorine oxidation)

Swimming pool water dechlorination and water quality improvement

Circulating cooling water side-stream filtration (reducing COD and biological slime)

Grey water reuse, deep wastewater treatment (decolorization, deodorization)

Exhaust gas scrubbing tower circulating water purification

We can provide activated carbon model selection, single-tank or multi-tank solutions based on raw water quality, flow rate, and effluent requirements. Welcome to send water quality reports and parameters for customized design.

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