The news that Varsseveld, the first municipal-scale MBR (membrane bioreactor) municipal wastewater treatment plant in the Netherlands, chose to close after eight years of operation has attracted the attention of the industry. Varsseveld is a demonstration project of MBR technology in the Netherlands. Why did such a representative sewage treatment plant choose to shut down? What does it say about closing? Since 2005, Varsseveld has chosen to close, but its many years of operating experience is still of great significance for the technical decision-making of sewage treatment. Many experts believe that from the technical characteristics of the MBR and the actual situation in the Netherlands, visitors should watch Varsseveld choose to shut down the reasons, and get inspiration. Application is key to adapting to local conditions Compared with traditional technology, the cost of MBR treatment process is 25% higher, and the energy consumption is also high to be considered; the application of MBR must find a suitable field and adapt it to local conditions. In wastewater treatment, the main driving force behind the application of MBR is its ability to provide high standards of effluent quality and save floor space. However, some people in the industry also stated that the Netherlands is not a water-scarce country. Water resources are relatively abundant, and the demand for reuse water is not large. Therefore, some experts believe that for the Varsseveld wastewater treatment plant in the Netherlands, the choice of MBR process is based on good demonstration effects and the mastery of this process, and good effluent water quality and floor space savings are not the initial choice of Varsseveld's MBR process. Reasons, and with years of operation, problems such as high energy consumption and high costs have become more prominent. Statistics show that the water quality of the effluent from the Varsseveld Sewage Treatment Plant with MBR technology is good, but the cost is high. The cost of a year's treatment of sewage using conventional processes is approximately 150,000 Euros (approximately 115 million yuan), while the cost of using MBR technology is 210,000 Euros (approximately 1.61 million Yuan), which is a process that is more traditional than traditional sand filter processing. The cost of the process is 25% higher. At the same time, some experts also emphasized that the Varsseveld sewage treatment plant has not reached the optimal operating status, and the electricity consumption is only about 1 degree. High energy consumption is also a major problem faced by the sewage treatment plant. Judging from the actual situation in the Netherlands, the advantages of MBR technology have not been well utilized. Therefore, people in the industry pointed out that the application of MBR must find a suitable field and adapt it to local conditions. Market urgently needs "standardization" China's MBR market has not achieved standardization, and equipment replacement may encounter difficulties. Insiders pointed out that most of the equipment in the Varsseveld sewage treatment plant in the Netherlands is relatively old, and some may no longer be produced. If you choose to replace or produce equipment, the cost will be even higher than the investment in the application of traditional process sewage treatment plants. In this regard, the industry believes that although GE has produced replaceable membrane modules for the Varsseveld wastewater treatment plant in the Netherlands, replacing components is not easy, and “standardization†will play a key role in the future development of the MBR market. The MBR process has the advantages of good water quality, land occupation, low sludge production, good automatic control, and good stability. Statistics show that municipal sewage in our country is the primary market growth point for MBR. At present, there are 60 sets of 10,000-ton systems in the country that have been used in municipal sewage treatment plants. It is expected that by the next year, the cumulative treatment capacity will exceed 5 million cubic meters per day. It is predicted that the application scope of MBR in municipal sewage will become wider and wider, more projects will be put into operation, and equipment replacement will be faced in the future. At present, China's MBR market has not achieved standardization. As a result, equipment replacement or will encounter a dilemma. Perspectives of professionals from all sides: Jin Tong Water Engineering (Beijing) Co., Ltd. Deputy General Manager Wang Tongchun: MBR is a good craft, but the industry despise it. Just like smartphones have many functions, users don't use or understand them. Even the best features are simply furnishings that don't work. If companies in the industry can't understand this, they will build large-scale municipal MBR projects and industrial MBR projects, which will make them very uncomfortable. To systematically summarize the MBR, we must fully understand its complexity and high-tech, as well as the specialization of operations management, so that the MBR can make better use of its role. Daisui Dai, general manager of Bishuiyuan: There is a misunderstanding in the industry about the understanding of MBR. At the moment, MBR is often referred to as a membrane. However, MBR is actually an improved or enhanced bio-processor that will bring in some traditional organisms. Deal with the effects of the process. The power consumption has dropped from 1 degree to the current 0.45 degree, which proves that the energy consumption of MBR can be reduced. In the future, energy consumption may still be reduced, but this requires further exploration and practice. Tsinghua University Professor Huang Xia: MBR application is a complex high-tech problem. Systemically, it can be divided into “upper, middle, and lower reachesâ€. Upstream is a manufacturer of membrane materials and membrane modules. It must be manufactured high. Performance of membrane materials and efficient membrane modules; midstream is the engineering design department and company of MBR system; downstream is the user of MBR, ie operation management sheet λ. Operations management must keep up.
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