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Potential of using nonwoven polyester fabric (NWPF) as a packing media in multistage passively aerated biological filter for municipal wastewater treatment
Author(s) -
Hellal Mohamed S.,
AbouElela Sohair I.,
Aly Olfat H.
Publication year - 2020
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12458
Subject(s) - aeration , nonwoven fabric , polyester , wastewater , hydraulic retention time , nitrification , pulp and paper industry , biofilter , biomass (ecology) , suspended solids , packed bed , filter (signal processing) , sewage treatment , total suspended solids , environmental science , environmental engineering , chemical oxygen demand , waste management , chemistry , materials science , chromatography , nitrogen , composite material , fiber , ecology , organic chemistry , computer science , computer vision , biology , engineering
The performance of a multistage passively aerated biological filter (PABF) packed with Nonwoven polyester fabric (NWPF) for municipal wastewater treatment was investigated under different operating conditions. The system was operated at different hydraulic retention times (HRTs) of 2.3, 1.72 and 1.38 h and corresponding to organic loading rates (OLRs) of 1.77, 2.15 and 2.9 kg BOD/m 3 . d. Increasing HRT and decreasing OLR, increased dissolved oxygen (DO) and consequently increased the removal rate of organic matters (87%), suspended solids (95.8%) and ammonia (88%). Profile results from different compartments showed that the major part of organic and suspended matters was removed in the upper layers of the system, whereas most of the suspended solids were trapped, while the nitrification process took place in the lower part of the PABF system because of the increase in DO concentrations. The results proved the advantage of using NWPF. It has pleated and rough surface which retain more biomass compared with plain surface. Excess biomass produced from PABF was negligible compared to conventional treatment systems.