AA SS AQUA HITECH CO., LTD.
| Operating voltage | 3 ~ 15 V (DC, safe voltage) |
| Installed power | 5 ~ 300 kW (depending on the concentration of toxic substances and the amount of water) |
| Inlet water B/C ratio | 0.02 ~ 0.20 |
| Supply Ability | 5 sets/month |
| Bacterial inhibition rate (effluent) | ≤20% (non-toxic or low-toxic, safe for biochemistry) |
| Payment Terms | L/C,T/T |
| Bacterial inhibition rate (influent) | 70%~100% (highly toxic) |
| Delivery Time | 20 work days |
| Detoxification power consumption | Depending on the concentration of toxic substances and the difficulty of oxidation |
| Processing volume | 1 ~ 500 m³/day (modular parallel operation) |
| COD of influent | 500 ~ 30000 mg/L |
| Place of Origin | China |
| Model Number | CQDHX |
| Brand Name | aa ss |
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Product Specification
| Operating voltage | 3 ~ 15 V (DC, safe voltage) | Installed power | 5 ~ 300 kW (depending on the concentration of toxic substances and the amount of water) |
| Inlet water B/C ratio | 0.02 ~ 0.20 | Supply Ability | 5 sets/month |
| Bacterial inhibition rate (effluent) | ≤20% (non-toxic or low-toxic, safe for biochemistry) | Payment Terms | L/C,T/T |
| Bacterial inhibition rate (influent) | 70%~100% (highly toxic) | Delivery Time | 20 work days |
| Detoxification power consumption | Depending on the concentration of toxic substances and the difficulty of oxidation | Processing volume | 1 ~ 500 m³/day (modular parallel operation) |
| COD of influent | 500 ~ 30000 mg/L | Place of Origin | China |
| Model Number | CQDHX | Brand Name | aa ss |
| High Light | electrochemical wastewater treatment equipment ，highly toxic wastewater treatment equipment ，electrochemical toxic wastewater treatment | ||
I. Product Overview
Highly toxic wastewater widely originates from industries such as pesticide/pharmaceutical synthesis, fine chemicals, dye and intermediate production, coal chemicals, electronic electroplating, and pharmaceutical fermentation. Its core characteristic lies in the presence of toxic substances that strongly inhibit or kill microorganisms, including but not limited to: antibiotics, nitrobenzene and aniline compounds, phenols and chlorophenols, polycyclic aromatic hydrocarbons, heterocyclic compounds (pyridine, quinoline, thiazole, etc.), cyanides, thiocyanates, heavy metal complexes, and high concentrations of residual organic solvents.
The prominent problem with this type of wastewater is that toxic substances cause the activated sludge in biological systems (A/O, SBR, MBR, etc.) to drop sharply in activity or even completely collapse within hours to days.
This system employs electrochemical oxidation technology, eliminating the need for dilution and directly pretreating highly toxic wastewater. Through direct anodic oxidation and electrocatalysis to generate strong oxidizing species such as hydroxyl radicals (·OH), these radicals rapidly attack the characteristic functional groups of toxic substances—nitro groups are reduced/oxidized and open rings, benzene rings are hydroxylated and then open, heterocycles are oxidized and broken, and the active structures of antibiotics are destroyed. Large toxic molecules are transformed into non-toxic or low-toxic small-molecule organic acids and alcohols. The biological toxicity of the treated effluent is significantly reduced to a level tolerable by microorganisms, and the BOD₅/COD ratio increases from below 0.1 to above 0.35, allowing it to safely enter subsequent biological treatment systems.
The entire process consumes only electricity, without adding any oxidants or chemical agents, and does not produce chemical sludge or adsorb saturated hazardous waste. It operates at normal temperature and pressure, making it an ideal pre-treatment unit for solving the problem of highly toxic wastewater that "cannot be directly treated by biochemistry".
II. Difficulties in treating highly toxic wastewater and solutions with this equipment
|
Address the difficulties |
Electrochemical solutions |
|
Toxic substances severely inhibit microbial activity, leading to frequent collapse of the biochemical system, sludge bulking, or death. |
Electrochemical pre-detoxification rapidly destroys toxic functional groups within 1-2 hours, eliminating inhibitory effects on microorganisms and ensuring the long-term stable operation of the biochemical system. |
|
Traditional methods involve high-level dilution (10-50 times), which significantly increases the amount of water to be treated and the investment required for construction. |
This method treats raw water directly without dilution, maintaining the same treatment volume, requires less equipment space, and has a significantly lower total investment than the "large-scale dilution + large-scale biological treatment" solution. |
|
Chemical oxidation methods (sodium hypochlorite/ozone/Fenton) consume a large amount of reagents, and the residual oxidant itself is harmful to microorganisms. |
The active species generated by electrochemistry exist only within the reactor, and their residual amount is extremely low after the residence time, so they will not be introduced into subsequent biochemical systems and cause secondary inhibition. |
|
Fenton oxidation produces large quantities of iron sludge, which is classified as hazardous waste and has high disposal costs. |
Zero solid waste, zero hazardous waste, and no sludge disposal process. |
|
Wastewater has a complex composition, with many types of toxic substances and large concentration fluctuations, making conventional processes unsuitable. |
The electrochemical oxidation capability is broad-spectrum and effective against various toxic functional groups; when the toxicity load increases, only the current needs to be adjusted, and the response speed is fast. |
|
The toxic wastewater has extremely poor biodegradability (B/C < 0.15), rendering the biological treatment stage almost ineffective. |
After detoxification, the B/C ratio increased to over 0.35, creating an "edible" carbon source for the biochemical system. |
|
Lacking rapid and effective detoxification methods, companies are forced to ship products for disposal elsewhere. |
On-site treatment costs only 1/5 to 1/3 of the cost of off-site treatment, and provides long-term benefits after a one-time investment. |
|
Toxic substances require a long period of time (2-4 weeks) for the biological system to re-cultivate and acclimatize the sludge, resulting in huge losses due to production stoppages. |
The electrochemical unit can be started and stopped at any time. Once the operation is stable, the effluent will consistently meet the standards. The biological system will no longer be affected by toxicity, and the risk of production shutdown will be greatly reduced. |
II. Working Principle
After suspended solids are removed by screening, sedimentation, or filtration, highly toxic wastewater enters an electrochemical reactor, where the following detoxification reactions occur under the action of electrodes:
(1) Direct electro-oxidation
The biotoxicity of toxic substances typically originates from specific chemical functional groups or molecular structures. At the anode surface, these toxic functional groups directly lose electrons and are oxidized and destroyed:
Nitrobenzenes: The nitro group is reduced to an amino group at the cathode or directly oxidized and opened at the anode. The benzene ring is hydroxylated and further oxidized and broken, transforming into low-toxicity or non-toxic organic acids.
Phenolics: The hydroxyl group on the benzene ring is oxidized to a quinone structure, opening the ring and ultimately mineralizing into small-molecule organic acids.
Heterocyclic compounds (pyridine, quinoline, thiazole, etc.): Nitrogen/sulfur heterocycles are directly opened at the anode surface, eliminating their biotoxicity.
Antibiotics: The active ring structure is oxidized and broken, losing its antibacterial activity.
Cyanides: Directly oxidized to cyanate at the anode, further hydrolyzed to ammonia and carbonates, completely detoxifying.
(2) Indirect electro-oxidation
Anodic electrolysis of water generates highly oxidizing hydroxyl radicals (·OH, oxidation potential 2.80 V), while simultaneously utilizing naturally occurring chloride ions in the wastewater to produce active chlorine (HOCl/OCl⁻). These active species diffuse into the solution: They supplement the oxidation of toxic substances that direct oxidation could not reach; they further mineralize partially oxidized intermediates into CO₂ and H₂O; and they simultaneously perform broad-spectrum oxidation of multiple toxic substances, ensuring thorough detoxification.
(3) B/C ratio increase
Macromolecular toxic substances are oxidized into small-molecule organic acids, alcohols, aldehydes and other biodegradable intermediates, resulting in a significant increase in wastewater BOD₅ and a simultaneous decrease in COD (partially mineralized into CO₂). The B/C ratio increases from 0.05~0.15 to 0.35~0.60, providing a high-quality carbon source for the biological treatment stage.
IV. Core Advantages
|
Advantages |
illustrate |
|
Rapid and precise detoxification |
Within 1-2 hours, toxic functional groups (nitro, benzene ring, heterocyclic, lactam ring, etc.) are destroyed, reducing the bacterial inhibition rate of the effluent from >90% to <20%, allowing the biological system to directly and safely receive the bacteria. |
|
No dilution required, direct treatment of raw water |
It does not require additional water, has high treatment efficiency, and avoids the ineffective cycle of "dilution-reconcentration". |
|
Significantly improve biochemical properties |
The B/C ratio increased from below 0.1 to above 0.35, resulting in a 40%–60% improvement in COD removal rate for the biochemical system. |
|
Completely eliminate the risk of chemical oxidant residue |
Without the addition of external oxidants, the electrobiotic species are effectively utilized within the reactor, resulting in effluent free of residual oxidants that inhibit subsequent biological processes. |
|
Zero chemicals, zero solid waste |
No chemicals are added, and no hazardous waste such as iron sludge, saturated carbon, or concentrate is generated. |
|
Broad-spectrum antitoxic shock |
When the type or concentration of toxic substances changes, the treatment intensity can be quickly matched by adjusting the current, with a system response time in minutes. |
|
Safe operation at normal temperature and pressure |
Operating voltage 3~15V DC, no high voltage, no high temperature, no flammable or explosive risks. |
|
Long-lasting maintenance-free electrodes |
Titanium-based coated electrodes are corrosion-resistant, pollution-resistant, do not scale or clog, and do not require replacement under normal operating conditions. |
|
Significantly reduce overall processing costs |
Instead of external disposal or high-dose oxidant addition, the operating cost per ton of water is 20% to 40% of traditional detoxification methods. |
V. Technical Specifications (Customizable)
|
parameter |
scope |
|
Processing volume |
1 ~ 500 m³/day (modular parallel operation) |
|
Installed power |
5 ~ 300 kW (depending on the concentration of toxic substances and the amount of water) |
|
Operating voltage |
3 ~ 15 V (DC, safe voltage) |
|
COD of influent |
500 ~ 30000 mg/L |
|
Inlet water B/C ratio |
0.02 ~ 0.20 |
|
B/C ratio of effluent |
0.35 ~ 0.60 |
|
Bacterial inhibition rate (influent) |
70%~100% (highly toxic) |
|
Bacterial inhibition rate (effluent) |
≤20% (non-toxic or low-toxic, safe for biochemistry) |
|
COD removal rate (detoxification section) |
20%~50% (primarily focused on open-loop chain breaking, not mineralization) |
|
Detoxification power consumption |
Depending on the concentration of toxic substances and the difficulty of oxidation |
|
Equipment Material |
PP / Stainless Steel / Titanium |
|
Inlet water requirements (pre-treatment recommended) |
SS ≤ 100 mg/L, oil ≤ 50 mg/L |
VI. Applicable to specific scenarios involving highly toxic wastewater
|
Sub-sectors |
Characteristics of toxic substances |
Key points for adapting electrochemical detoxification |
|
Pesticide/herbicide synthesis |
It contains organophosphates, organochlorines, pyrethroids, triazines, etc., and is extremely toxic to organisms. |
Direct oxidation destroys phosphorus- or chlorine-containing reactive groups, eliminating toxic mechanisms such as acetylcholinesterase inhibition. |
|
Bio‑active chemical compounds and synthetic intermediates (biochemical preparation |
Containing β-lactam rings (penicillins, cephalosporins), nitroimidazoles, etc., residual antibiotics inhibit microorganisms. |
Oxidation opens the lactam ring and nitroimidazole ring, completely inactivating the antibiotic, allowing the effluent to safely enter the biological treatment process. |
|
Dyes and dye intermediates (especially benzidines) |
Contains azo bonds and benzidine structures, and is carcinogenic and biotoxic. |
Breaking the azo bond and the benzidine conjugated structure eliminates mutagenicity and biotoxicity. |
|
Coking/Coal Chemical Industry |
Contains phenols (phenol, cresol, naphthol), cyanide, pyridine, quinoline, etc. |
Phenolic compounds undergo ring-opening oxidation, cyanide is oxidized to cyanate, heterocycles undergo ring-opening, and after comprehensive detoxification, biochemical reactions are performed. |
|
Production of nitro compounds (nitrobenzene, nitrobenzene, nitrochlorobenzene, etc.) |
Nitrobenzene compounds are hemotoxic and neurotoxic, and are extremely difficult to biodegrade. |
Nitro groups undergo cathodic reduction or anodic oxidation, resulting in ring opening via hydroxylation of the benzene ring and a significant reduction in biotoxicity. |
|
Fine chemicals/fragrances/surfactants |
Contains active functional groups such as aldehydes, unsaturated lactones, and epoxy structures. |
The aldehyde group is oxidized to a carboxyl group, and the epoxy ring is opened, eliminating cytotoxicity to microorganisms. |
|
Electronic chemicals (photoresist, developer waste liquid) |
Contains phenolic resin, tetramethylammonium hydroxide (TMAH), etc. |
TMAH is electrochemically oxidized into dimethylamine and other low-toxic substances, and the phenolic resin is ring-opened to solve the problem of biochemical inhibition of electronic waste liquid. |
|
Medical wastewater/pharmaceutical fermentation residue |
Contains residual antibiotics, disinfectants, and organic solvents. |
Antibiotics are inactivated and disinfectants are decomposed to ensure that toxicity is eliminated before municipal wastewater treatment plants receive the wastewater. |
VII. Process Location
Option 1: Pretreatment and Detoxification
Highly toxic wastewater → Screening/Sedimentation/Flotation (removal of suspended solids and floating oil) → pH adjustment (to 6-9) → Electrochemical detoxification equipment (deactivation of toxic groups, B/C ratio increase) → Intermediate tank/Buffer tank → Biological system (A/O, A²/O, MBR, etc.) → Discharge meeting standards
Note: The electrochemical detoxification unit is placed before the biological system, replacing traditional high-ratio dilution or chemical oxidation pretreatment. After significantly reduced toxicity, the wastewater enters the biological system, ensuring high COD removal rate and ammonia nitrification efficiency. The system can operate stably for a long time. This is the most common and economical process route.
Option 2: Complete Mineralization
Highly Toxic Wastewater → Pretreatment → Electrochemical Deep Oxidation Equipment → Effluent (COD reduced to below 500 mg/L, toxicity completely eliminated) → Discharge meeting standards or transported for compliant disposal
Note: For small volumes of wastewater with extremely high toxicity, inadequate biological systems, or no biological facilities at the plant, electrochemical equipment can directly mineralize organic matter to emission standards by extending residence time and increasing current density, completely eliminating reliance on biological systems.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Other
Year Established:
2005
Total Annual:
$5 million-$6 million
Employee Number:
40 people~60 people
Ecer Certification：
Verified Supplier
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 ... 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 ...
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