Breaking the Dilemma of Landfill Leachate Treatment: An Analysis of SINOKLE's CDFU+CDOF High-Efficiency Process
Landfill leachate, a highly concentrated and highly toxic organic wastewater generated during landfill disposal and incineration, has long been a stubborn problem in the field of wastewater treatment, because of its extremely high pollutant concentrations (COD often reaching tens of thousands of mg/L and ammonia nitrogen exceeding 1,000 mg/L), complex composition, poor biodegradability, and large fluctuations in water quality and quantity. How to achieve efficient, low-cost treatment without secondary pollution is a core problem the industry urgently needs to solve.
1. Limitations of Traditional Treatment Processes and Industry Pain Points
At present, the industry's mainstream combined process of pre-treatment + biological treatment (such as MBR) + advanced membrane treatment (NF/RO) has exposed insurmountable defects in long-term operation:
The concentrate dilemma of membrane technology: Although membrane treatment can produce clear water, it essentially separates and concentrates pollutants physically, generating membrane concentrate that accounts for 15%-30% of the influent. This concentrate is enriched with refractory organics and salts; recirculation easily causes salt damage and contamination of the system, while evaporation or incineration disposal consumes extremely high energy, with a comprehensive cost per ton of water often exceeding 150 yuan, and it readily causes secondary pollution.
Efficiency bottleneck of biological treatment: Biological processes are sensitive to water quality fluctuations; especially for aged leachate with a low B/C ratio (0.1-0.3), it is difficult to degrade the stubborn macromolecular organics, and the effluent COD often cannot be kept stably below 1,000 mg/L, failing to meet increasingly stringent discharge standards.
High cost and secondary pollution of physicochemical methods: Methods such as Fenton oxidation are not affected by water quality, but they require the addition of large amounts of chemicals and produce huge quantities of hazardous iron sludge, with high operating costs, making them unsuitable for large-scale continuous treatment.
Complex system and O&M challenges: The traditional process chain is lengthy and involves multiple stages, making operation and management complicated. Membrane modules are prone to fouling and their flux decays quickly; frequent cleaning and replacement lead to high O&M costs and low system reliability.
2. SINOKLE's New Process: CDFUandCDOF Synergistic Innovation
In response to the above pain points, SINOKLE Technology abandoned the old path that relies on membrane concentration and innovatively adopted a synergistic treatment process centered on CDFU (Swirl Dissolved Air Flotation unit) and CDOF (integrated ozone advanced catalytic oxidation and flotation unit), achieving the unity of efficient degradation and low-carbon operation.
1. CDFU: Efficient pre-treatment that reduces the load on advanced oxidation
Swirl dissolved air flotation is a new generation of green, high-efficiency vertical-tank flotation equipment developed by our company. Integrating swirl centrifugal separation, ultra-fine bubble generation, and dissolved air flotation technologies, it achieves efficient and rapid separation of waste oil, emulsified oil, suspended solids, and other pollutants in wastewater through the organic combination of multiple technologies.
2. CDOF: The core of advanced oxidation, cracking refractory COD
The unit consists of an oxygen generation system, an ozone generation system, a high-efficiency ozone dosing system, a multi-stage catalytic reaction system, and a swirl dissolved air flotation system. Integrating multi-stage ozone catalytic oxidation, hydrodynamic cavitation, and swirl flotation technologies, it is a domestically original integrated high-efficiency oxidation and flotation unit with internationally leading performance, capable of efficiently and rapidly removing petroleum substances, suspended solids, colloids, COD, bacteria, and many other pollutants from wastewater.
4. Summary: Providing Certain Solutions for the Industry
SINOKLE'sCDFU+CDOF new landfill leachate treatment process directly addresses the industry's three major pain points of difficult concentrate disposal, high operating costs, and difficulty in consistently meeting standards. This technology not only provides an efficient and reliable solution for landfill leachate treatment, but also sets a replicable example for the green and low-carbon transformation of the entire difficult industrial wastewater treatment field.
