In today's rapidly developing environmental technology, DTRO (Disk Tube Reverse Osmosis) sewage treatment equipment has become one of the core technologies in the field of water treatment due to its efficient and stable performance. This technology originated in Germany in the 1990s and effectively breaks through the limitations of traditional reverse osmosis technology through a unique disc tube membrane module design, demonstrating significant advantages in the field of high concentration wastewater treatment. According to the International Water Association, the annual total amount of wastewater treated by DTRO equipment worldwide has exceeded 1 billion cubic meters, and it is widely used in industries such as chemical, pharmaceutical, and food processing, providing a critical path to solving industrial wastewater pollution problems.
The core of DTRO technology lies in its innovative reverse osmosis principle. The system pressurizes the raw water to 4-8 MPa (megapascals) through a high-pressure pump, far exceeding the pressure range of 2-4 MPa of conventional reverse osmosis technology. Under this high pressure, water molecules are separated from impurities such as salt and organic matter by the semi permeable membrane, forming clean water production. The special structure of the disc tube membrane module is composed of a series of concentric circular discs stacked together, and the water flow passes through the disc gaps in a turbulent state, effectively alleviating the problem of membrane fouling. Experimental data from the German company OSMONICS shows that the removal rates of COD (chemical oxygen demand) and TDS (total dissolved solids) by the DTRO system can reach over 95% and 98%, respectively, which is much higher than the 70% -80% level of traditional biological treatment technologies.
To achieve the above excellent performance, the DTRO system integrates precision equipment modules. As the power core, the high-pressure pump adopts a multi-stage centrifugal structure, which can ensure efficient pressurization while reducing energy consumption. The membrane components are made of high-strength engineering plastics, with strong corrosion resistance and a service life of over 5 years. The concentrated water circulation unit maintains system stability by intelligently regulating the reflux ratio. It is worth noting that its automation control system can achieve 24-hour unmanned operation, monitoring key parameters such as inlet pressure and water production flow rate in real time through PLC (programmable logic controller). When the pressure difference of the membrane component exceeds the set threshold, the chemical cleaning program will be automatically started.
In specific application scenarios, DTRO technology has demonstrated strong environmental and economic benefits. In the field of coal chemical industry, a large coking enterprise adopts DTRO system to treat phenol containing wastewater, with a daily processing capacity of 2000 tons and a water reuse rate of over 70%, saving 1.4 million tons of fresh water resources annually. In the pharmaceutical industry, a certain antibiotic production enterprise uses the DTRO process to convert high salt wastewater into process water that meets reuse standards, reducing treatment costs by 40% compared to traditional evaporative crystallization processes. More noteworthy is that DTRO has achieved technological breakthroughs in the field of leachate treatment. After applying this technology to a municipal landfill, the cost of leachate treatment has decreased from 120 yuan/ton to 80 yuan/ton, and the COD emission concentration has remained stable below 50mg/L, meeting the national first-class A emission standard.
The long-term stable operation of equipment relies on a scientific maintenance system. The common types of membrane fouling in DTRO systems include inorganic scaling, organic matter attachment, and microbial growth. The operation and maintenance personnel need to adjust the cleaning frequency regularly according to the incoming water quality. Generally, chemical cleaning is carried out every 3-6 months, and cleaning agents include citric acid, sodium hydroxide, sodium hypochlorite, etc. At the same time, real-time tracking of membrane performance changes is achieved through an online conductivity monitoring system. When the rate of increase in water conductivity exceeds 20% per month, maintenance procedures should be immediately initiated. According to operational data from a chemical industrial park, the DTRO system using standardized maintenance procedures can extend the average service life of membrane components by 18 months and reduce annual maintenance costs by 15%.
As an innovator in sewage treatment technology, DTRO equipment is leading the water treatment industry towards high efficiency and energy conservation. With the advancement of membrane material manufacturing technology and the upgrade of intelligent control systems, DTRO systems will play a greater role in fields such as seawater desalination and zero emission processes in the future. It is expected that by 2030, the global market size of DTRO equipment will exceed 20 billion US dollars, becoming a key technological support for ensuring sustainable utilization of water resources. This environmentally friendly equipment that integrates physical separation and intelligent control not only meets the practical needs of industrial wastewater resource utilization, but also represents the wisdom crystallization of human response to water environment challenges.
