The utility model relates to a filter, in particular to a verticalfilter which can accomplish filter at one time with no materials left.
本实用新型涉及过滤装置，特别是一种一次滤完无剩料的立式过滤机。
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In a verticalfilter made up of sand and gravel more than 80 % of the total nitrogen at 50 cm ground depth consists of nitrate, whereas only roughly 10 % consist of ammonium.
In addition, only one edge filter is used for both vertical filtering and horizontal filtering in our design by proper data storage and attemper, this reusing strategy reduces the resource cost.