Full-chain anaerobic + advanced oxidation equipment matrix, one-stop matching for industrial park wastewater management requirements

Comprehensive expansion of control indicators

Three new categories of mandatory assessment items added

The guidelines clearly state that wastewater from industrial parks such as chemical, electroplating, food processing and manufacturing, pharmaceutical, printing and dyeing, petrochemical, and coal chemical industries must simultaneously control three new categories of indicators:

· Mandatory control of salt content:High-salinity wastewater parks need to add total salt content and chloride limits. Direct biological treatment of high-salinity wastewater can easily lead to sludge inactivation, so efficient anaerobic salt-tolerant pretreatment must be installed upstream;

· Mandatory assessment of comprehensive toxicity:Effluent from parks involving heavy metals, dyes, antibiotics, and pesticide wastewater must be assessed for aquatic biological toxicity. Traditional biochemical processes cannot degrade toxic intermediates, so advanced oxidation units must be provided as supporting treatment;

· Routine regulation of emerging contaminants:Perfluorinated substances such as PFOA and HFPO-TA have been included in control measures. The removal rate of ordinary anaerobic processes is less than 10%, so synergistic advanced treatment using electrocatalytic oxidation plus anaerobic membranes is required.

Classified management and control of parks

Process thresholds have been substantially raised

According to the industries to which enterprises in the park belong and the discharge standards they implement, parks are classified into single-industry type and comprehensive type (similar-industry / dominant-industry / differentiated type), with discharge limits set differentially:

· Single-industry parks (electroplating, printing and dyeing, food):Must match industry-specific emission standards, and high-concentration mother liquor requires segregated pretreatment;

· Comprehensive mixed-industry parks:Pollutants are diverse and water quality fluctuates greatly, requiring processes with shock-load resistance and full pollutant degradation capacity; dilution to meet standards is strictly prohibited;

· Parks without conditions for unified standard-setting shall implement “one park, one policy”and simultaneously impose regulatory requirements on the entire wastewater process, rainwater collection, and reclaimed water reuse.

Full-chain prevention and control requirements

No blind spots from source to biochemical treatment to advanced treatment to tail gas

The new regulations no longer control only the terminal main discharge outlet:

· Enterprises’ high-concentration mother liquor requires segregated pretreatment, and monitoring points shall be set up for segregated pretreatment facilities;

· Contaminated rainwater shall be uniformly collected and enter the wastewater station for treatment, and must not be directly discharged into rainwater outlets;

·Odor from sewage stations is treated simultaneously to avoid secondary air pollution;

·Encourage the resource recovery and reuse of effluent water; the process must meet both discharge compliance and regeneration/reuse standards.

Combining the full-dimensional requirements of the Technical Guidelines for the Formulation of Water Pollutant Discharge Standards for Centralized Sewage Treatment Facilities in Industrial Parks—including pollutant control, segregated treatment, advanced detoxification, denitrification, and odor removal—Green Creation Environment's seven core equipment units form a complete process loop, adapting to different park water qualities and industry types:

Applicable scenarios:Pain points of total nitrogen exceeding standards in pharmaceutical, chemical, electroplating, and food parks, benchmarked against new regulations for refined total nitrogen control. Addressing the accumulation of nitrate nitrogen and organic nitrogen caused by the mixing of wastewater from multiple industries in comprehensive parks, it strengthens the anoxic denitrification environment, with high sludge concentration and stable denitrification efficiency, without the need for a large amount of additional carbon source, solving the difficult problem that total nitrogen in traditional processes is hard to stably meet standards, and meeting the strict discharge limit requirements of ecological control zoning.

Technical advantages:

· Compared with the traditional nitrification-denitrification process, this process controls the nitrification process at the nitritation stage, greatly reducing the oxygen supply. Compared with the traditional process, it can save more than 50% of power consumption and greatly reduce treatment costs;

· The denitrification process requires no participation of organic matter, gets rid of dependence on exogenous organic matter, and greatly reduces treatment costs;

· The amount of excess sludge produced is extremely small, only about 20% of that of the traditional biological denitrification process;

· At the same time, this system can effectively adjust the parameters required for each reaction, achieving efficient autotrophic denitrification, with an ammonia nitrogen removal rate of up to 95%; a total nitrogen removal rate of 75%--85%;

· It has high denitrification efficiency and a simple process flow, reducing infrastructure costs.

Applicable scenarios:Wastewater containing dyes, antibiotics, PFOA, and heterocyclic toxicants, addressing the mandatory requirements of new regulations for comprehensive toxicity and emerging pollutant control.

1. Fenton fluidized bed reactor

Based on the traditional Fenton reaction tower, our company has developed a patented Fenton fluidized bed reactor. By using a fluidized bed approach, most of the substances produced by the Fenton method are attached to the surface of the fluidized bed Fenton carrier in the form of crystals or precipitates, which can greatly reduce the amount of chemical sludge generated by the dosage used in the traditional Fenton method (H₂0₂The dosage is reduced by 10%~20%, Fe₂The dosage is reduced by 50% to 70%, and the sludge volume is reduced by 40% to 50%. Meanwhile, the iron oxide formed on the carrier surface has a heterogeneous catalytic effect, and fluidized bed technology also promotes the chemical oxidation reaction rate and mass transfer effect, effectively increasing the COD removal rate by 10% to 20%, saving 30% to 50% of treatment operating costs, and making it suitable for printing and dyeing, pesticide, and chemical industrial parks.

2. Electrocatalytic oxidation reactor

Electrocatalytic oxidation technology uses electrochemical principles with alloy metals such as aluminum, iron, and titanium-ruthenium as the main electrodes. With the application of an external pulse voltage, it generates electrochemical reactions, converting electrical energy into chemical energy. Through the synergistic effects of electrocatalytic oxidation, electrocatalytic reduction, electrocatalytic flocculation, and electrocatalytic air flotation, it degrades or separates pollutants in wastewater, thereby purifying water bodies. Its main mechanisms of action include four parts: strong oxidation—self-generated oxidants; strong reduction—self-generated reductants; flocculation—self-generated flocculants; air flotation—self-generated gas ultrafine bubbles—as well as functions such as sterilization and decolorization integrated into one. It is suitable for new materials, electronic electroplating, and fluorine chemical industrial parks, meets the mandatory monitoring and control requirements for new pollutants in the guidelines, and is a core unit for achieving comprehensive toxicity compliance.

Applicable scenarios:Odor treatment for wastewater stations in all types of industrial parks, achieving coordinated water and gas management. Odor from anaerobic tanks, equalization tanks, and sludge rooms is centrally collected, and biofilms degrade hydrogen sulfide and volatile organic compounds without secondary pollution. This fills the gap in tail gas management at park wastewater stations, achieves integrated treatment of water pollutants and air pollutants, and complies with the whole-process environmental risk prevention and control principles for centralized treatment facilities in parks.

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