Which new biological treatment technologies have shown advantages in industrial wastewater treatment?
2025/06/27
Synthetic biology technology: A team from the Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences and Shanghai Jiao Tong University has successfully constructed a novel engineered strain VCOD-15 capable of simultaneously degrading five organic pollutants. This strain can achieve a removal rate of over 60% for five target pollutants within 48 hours, among which p-biphenyl can be completely degraded. It remains active in chlor-alkali wastewater with a salinity as high as 102.5 grams per liter, overcoming the bottleneck of traditional strains that "become inactive upon contact with salt", and providing a new solution for the treatment of high-salt wastewater from petrochemical, chlor-alkali and other industries.
Bionic aquatic plant technology: This is a water body restoration technology that integrates materials science, microbiology and ecological engineering. It selects materials such as polyester fibers with high specific surface area and positive charge characteristics, which can efficiently adsorb microorganisms. Through "physical-biological synergy", it achieves purification. The fiber structure can intercept suspended particles, and the surface biofilm can decompose pollutants. It can also form an anaerobic environment in the inner layer of the biofilm to promote denitrification. In addition, nanomaterials generate active oxygen under light, which can oxidize and decompose refractory organic substances. This technology does not require the addition of chemicals, avoiding secondary pollution. It has been widely applied in the restoration of black and odorous rivers, aquaculture and other fields.
Membrane bioreactor (MBR) technology: It is a new type of sewage treatment technology that combines efficient membrane separation technology with the activated sludge process. It can effectively remove solid suspended particles and organic particles, enabling the activated sludge to have a higher MLSS value, prolonging its retention time in the reactor, and enhancing the nitrogen removal rate and the degradation efficiency of organic matter. The MBR system is easy to operate and has a high degree of automation. Compared with traditional treatment systems, it can save 50% of the land use area, produce less sludge, have lower operating costs, and the effluent quality is good and can be directly reused.
Biological enhancement technology: The core is to precisely add highly efficient compound bacterial strains to the treatment system. These strains can survive and work efficiently under harsh conditions such as high salt, high ammonia nitrogen and low temperature. They can quickly start the treatment system. In the anaerobic treatment stage, the microbial community can be completed within a few days, and in the aerobic treatment stage, the adaptation period of the strains can be shortened to one week. This technology is easy to operate and does not require complex pretreatment or dedicated equipment. Just add the bacterial strains directly, which can significantly improve the treatment efficiency of refractory COD.
Comprehensive biological enhancement/sludge regulation treatment technology for high-salt industrial wastewater: In response to the challenge of treating high-salt chemical wastewater, it introduces pretreatment methods to remove high-concentration and refractory toxic substances, and utilizes highly active microbial strains and multi-functional salt-tolerant microbial populations to treat and remove the majority of COD, achieving efficient treatment of high-sulfur and nitrogen-containing chemical wastewater. This technology has also developed a new synchronous desulfurization and denitrification technology for sulfur and nitrogen-containing organic wastewater based on the denitrification and desulfurization effect of microorganisms, which can improve the efficiency of wastewater treatment and meet the requirements of green environmental protection.
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