Zkoušky poloprovozní flotační jednotky

Testing of pilot scale flotation thickener

conference paper

en

This paper is focused on presentation of design and further testing of pilot scale flotation unit. This unit was designed in the frame of the project FR–TI3/522 Innovative Approach towards Cleaning of Waste Water KUNST Flotation Unit. The dimensions of the flotation tank are 2.5 x 1.5 x 1.5 m and it is installed (with components like saturation tank, pumps and compressor) in the mobile container. The flotation unit is placed at wastewater treatment plant Hranice (the capacity of 30,000 PE) and it is operated as dissolved air flotation with recirculation. The activated sludge and waste activated sludge was thickening there. No additional chemicals were added. When activated sludge was treated the content of total solids in thickened sludge was ranging from 2.2 to 3.4 wt. %. Flotation of waste activated sludge produced the thickened sludge with 2.1 to 4.5 wt. % of total solids. Both at flotation of activated and waste activated sludge, the treated water contained only small amount of suspended solids (less than 10 mg/L for activated sludge and from 30 to 80 mg/L for waste activated sludge).

Příspěvek presentuje poloprovozní flotační jednotku a výsledky jejího testování na ČOV Hranice. Jednotka byla vyvinuta v rámci projektu FR-TI3/522 Inovativní přístupy v čištění odpadních vod – Flotační jednotka KUNST. Flotační nádrž o rozměrech 2.5 x 1.5 x 1.5 m je vč. periferií je instalována v mobilním kontejneru. Testování flotační jednotky probíhalo na ČOV Hranice, kde byl postupně zahušťován aktivovaný a poté přebytečný aktivovaný kal, a to bez přídavku flokulantů. Při zahušťování aktivovaného kalu bylo dosahováno 2,2 až 3,4 % sušiny v zahuštěném kalu, zatímco při zahušťování přebytečného kalu to bylo 2,1 až 4,5 % sušiny. Během flotace byla produkována kalová voda poměrně vysoké kvality, při zahušťování aktivovaného kalu byl obsah nerozpuštěných látek obvykle pod 10 mg/l, při zahušťování přebytečného kalu to pak bylo obvykle v rozmezí 30 až 80 mg/l.

This paper is focused on presentation of design and further testing of pilot scale flotation unit. This unit was designed in the frame of the project FR–TI3/522 Innovative Approach towards Cleaning of Waste Water KUNST Flotation Unit. The dimensions of the flotation tank are 2.5 x 1.5 x 1.5 m and it is installed (with components like saturation tank, pumps and compressor) in the mobile container. The flotation unit is placed at wastewater treatment plant Hranice (the capacity of 30,000 PE) and it is operated as dissolved air flotation with recirculation. The activated sludge and waste activated sludge was thickening there. No additional chemicals were added. When activated sludge was treated the content of total solids in thickened sludge was ranging from 2.2 to 3.4 wt. %. Flotation of waste activated sludge produced the thickened sludge with 2.1 to 4.5 wt. % of total solids. Both at flotation of activated and waste activated sludge, the treated water contained only small amount of suspended solids (less than 10 mg/L for activated sludge and from 30 to 80 mg/L for waste activated sludge).

flotace, DAF, zahušťování kalu, aktivovaný kal, poloprovoz

dissolved air flotation, DAF, sludge thickening, activated sludge, pilot plant

2013

08.04.2013

ČSPCH

Praha

978-80-86238-37-1

Sborník konference 1. international Conference on Chemical Technology

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C 3.8-1–C 3.8 -6

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