Filter cake impact on the textile filtersfor wastewater treatment hydraulic capacity

• Autorzy: Spychala M. , Sowinska A.

Warianty tytułu

PL

Wpływ placka filtracyjnego na wydatek filtrów włókninowych do oczyszczania ścieków

• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to identify the filter cake hydraulic conductivity and its impact on the hydraulic capacity of textile filters for wastewater treatment. The study was carried out using septic tank effluent filtered on four types of filters of different thickness (0.9, 1.8, 3.6 and 7.2 mm). The dry biomass content was 13.45–36.7 mg TS per 1 cm2 at organic loading rate of 0.04–0.07 mg BOD5 per 1 mg d.m. per day. The filter cake dry mass was related to filter thick-ness. The dry mass content of filter cake was about 9.7–19.1% of whole filter cross-sectional profile TS content in the long-term experiment. The filter cake had a significant impact on the hydraulic capacity reduction due to its high density and small porosity. The volumetric density of filter cake biomass was almost twice as high as the volumetric density of biomass inside the textile filter. The filter hydraulic conductivity of a one-layer filter without filter cake was over four orders of magnitude higher than the hydraulic conductivity of a one-layer filter with filter cake formed during the short-term experiment.

PL

Celem badań było określenie współczynnika filtracji placka filtracyjnego oraz jego wpływu na wydatek hydrauliczny filtrów włókninowych oczyszczających ścieki. Badania prze-prowadzono z użyciem ścieków odpływających z osadnika gnilnego, filtrowanych przez filtry o czterech grubościach (0,9, 1,8, 3,6 i 7,2 mm). Zawartość suchej masy wynosiła 13,45–36,7 mg zawiesiny ogólnej w 1 cm2 dla obciążenia ładunkiem związków organicznych wynoszącego 0,04–0,07 mg BZT5 na 1 mg suchej masy osadu w ciągu doby. Sucha masa placka filtracyjnego była związana z grubością filtra. Zawartość suchej masy placka stanowiła 9,7–19,1% zawartości sub-stancji stałych całego przekroju poprzecznego warstwy filtracyjnej w przypadku testu długoter-minowego. Placek filtracyjny miał istotny wpływ na zmniejszenie wydatku za sprawą swojej dużej gęstości i małej porowatości. Gęstość objętościowa biomasy placka filtracyjnego była prawie dwukrotnie większa od gęstości objętościowej biomasy wewnątrz włókniny. Współczyn-nik filtracji jednowarstwowego filtra bez placka filtracyjnego, badanego w ramach testu krótko-terminowego, był o ponad cztery rzędy wielkości większy od współczynnika filtracji tego filtra pokrytego plackiem filtracyjnym.

• Wydawca: -
• Czasopismo: Nauka Przyroda Technologie. Uniwersytet Przyrodniczy w Poznaniu
• Rocznik: 2015
• Tom: 09
• Numer: 4
• Opis fizyczny: http://www.npt.up-poznan.net/pub/art_9_55.pdf

Twórcy

autor

Spychala M.

• Department of Hydraulic and Sanitary Engineering, Poznan University of Life Sciences, Piatkowska 94, 60-649 Poznan, Poland

autor

Sowinska A.

• Department of Hydraulic and Sanitary Engineering, Poznan University of Life Sciences, Poznan, Poland

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Identyfikatory

DOI

10.17306/J.NPT.2015.4.55