TRICKLING FILTER Russian patent published in 2014 - IPC C02F3/00 B05B1/14 

FIELD: process engineering.

SUBSTANCE: invention relates to water engineering, particularly, to water treatment systems. Tricking filter comprises casing, waste water feed system, sprayer and bed. Said casing is composed of rectangular unit with dual bottom. upper bottom composed by fire grate and lower solid bottom with reinforced concrete walls and cover. Besides it comprises waste water dispensing tanks, waste being fed thereto via waste water feed system intake branch pipe. Note here that the height of bottom-to-bottom space should be at least 0.6 m. Trickling filter drainage should be made up of reinforced concrete plates to be laid on concrete supports. Note also that total area of opening for water flows into drainage system should make at least 5÷8% of trickling filter surface area. Water velocity therein should make at least 0.6 m/s. Note that waste water feed system comprises branched system of pipelines with sprayers equally spaced apart above filter bed. Note that lower bottom inclination to collection chutes makes at least 0.01 while lengthwise inclination of said chutes equals 0.005. Filter walls are made of prefabricated reinforced concrete and tower above bed surface for 0.5 m to decrease wind influence on water distribution over filter surface. Filter bed represents crushed stone and gravel.

EFFECT: higher reliability and efficiency.

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