VACUDEST处理垃圾渗滤液的应用案例

H2O创新的真空蒸馏技术可靠的保证了污水处置排放至水源的指标。

On landfills leachate occurs from condensation, which normally is heavily contaminated with pollutants. Percolation into the ground-water is, because of the nitrogen compound and organic contamination, not allowed. To reach the strict values for disposal such leachate needs to be collected and trated. In November 2009, an ultramodern leachate treatment system was installed in Mallabia (Basque country) by the disposal-consortium BETEARTE, which consists of the 3 biggest waste-companies in Spain. The picture below shows the plant, which has been built by SIDASA. The objective was to use most modern technology, working economically and complying reliably with the strict legal limits for disposal.

行业: 废水管理
VACUDEST的位置：Mallabia / 西班牙

最初的情况

垃圾渗滤液这种重污染的废水是由垃圾填埋地的聚缩反应而形成。此类废水中有含氮化合物及几有机污染物，所以不允许采用先过滤后排至地下水的处理措施。要保持严格排污责任的价值，垃圾渗滤液需要集中收集并加以处理。

2009年11月，在西班牙的 Mallabia（巴斯克州），由该国最大的三家废物处理公司组成的废物处理集团Betearte 投产了一台高度现代化垃圾渗滤液处理系统。

下图既是这台设备的图示,由SIDASA负责规划建造。投入这套设备的目标是运用现代化的技术来保证渗滤液的处理经济实可行并稳定可靠的满足法定排污指标。

两百万吨垃圾填埋所产生的渗滤液抽至C/P前处理装置前集中收集在一个5000 m3槽罐中，通过絮凝沉淀渗滤液中的污染物浓度会锐减，然而依然不能达到法排至指标标。排放指标需要通过真空蒸馏的工艺来实现。处理装置的核心工艺废水在700mbar的为负压状态下通过两台VACUDEST L6000蒸发。重金属，有机成分及盐类将会被与洁净水确实可靠的分离.而由蒸发产生的蒸汽将会通过罗茨泵压缩至大气压强。压缩的过程中蒸汽温度降回升至120° C。这部分过热，无菌蒸汽同时能够作为加热介质回用给进入VACUDEST 蒸馏系统的渗滤液废水换热。以这样能量循环使用的方式进行处理对比比大气蒸馏工艺-节约了95%的能耗

解决办法

安装在BETEARTE的这两台VACUDEST L 6000（处理量12.000m3/年）作为最佳化处理循环垃圾渗滤废液的装置。因为处理后洁净蒸馏水的氯离子浓度很高，所以设备需要运用特殊材质来避免腐蚀。同时设备内还集成了遵循自循环流体原理，最佳化除沉积结垢的专利Activepowerclean–此专利确保了热交换器内壁的清洁确保了高效的热传质和蒸发率。与传统的真空蒸馏系统装置相比，能耗降低了15%显示其在能耗上的优势同时蒸发效率极高从而减少了浓缩物的委外费用，保证了整套系统的经济性。

设备开车期间，渗滤液的浓缩系数达到20倍，远远超出了预期。清洁后的水质如此之高，甚至可以直接汇入附近的河流。

也有许多其他办法可以用于处理垃圾渗滤液的废液。典型的处理方式为RO反渗透膜或者离子交换。
为了确保满足严格的法定排放指标，能分离大量有害物质的VACUDEST真空蒸馏系统推荐处理此类废水的最佳装置。通过VACUDEST正空蒸馏系统能在使用最小能耗的条件下浓缩分离这些有害物质。也正因如此，其他废弃物处理企业，如西班牙的Befesa或法国的Veolia也都决定采用H2O的蒸发机技术来处理工业废水。

Advantages through our solution

Reliable

Our innovative technologies enable safe compliance with limit values. The treated water impresses with excellent quality that you can always rely on.

Sustainable

From 100 percent wastewater, 98 percent clean distillate is produced, which can be reused in your processes: You realise a wastewater-free production and thus make a valuable contribution to the protection of our environment.

Fully automatic

Our solutions operate fully automatically, 24 hours a day, 7 days a week. The intuitive control system allows easy access, so even the weekly system check is done quickly.

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