Anoxic treatment of agricultural drainage water in a venturi-integrated membrane bioreactor
Yükleniyor...
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Multidisciplinary Digital Publishing Institute (MDPI)
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Due to low sludge production and being a clean source without residuals, hydrogen-based
autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural
drainage waters or water/wastewater with a similar composition. Although the incorporation of
hydrogen-based autotrophic denitrification with membrane bioreactors (MBRs) enabled almost 100%
utilization of hydrogen, the technology still needs to be improved to better utilize its advantages.
This study investigated the anoxic treatment of both synthetic and real drainage waters using
hydrogen gas in a recently developed membrane bioreactor configuration, a venturi-integrated
submerged membrane bioreactor, for the first time. The study examined the effects of the inflow
nitrate concentration, and the use of a venturi device on the removal efficiency, as well as the effects of
the presence of headspace gas circulation and circulation rate on membrane fouling. The study found
that using the headspace gas circulation through a venturi device did not significantly affect the
treatment efficiency, and in both cases, a removal efficiency of over 90% was achieved. When the inlet
NO−
3
–N concentration was increased from 50 mg/L to 100 mg/L, the maximum removal efficiency
decreased from 98% to 92%. It was observed that the most significant effect of the headspace gas
circulation was on the membrane fouling. When the headspace gas was not circulated, the average
membrane chemical washing period was 5 days. However, with headspace gas circulation, the
membrane washing period increased to an average of 12 days. The study found that the headspace
gas circulation method significantly affected membrane fouling. When the upper phase was circulated
with a peristaltic pump instead of a venturi device, the membrane washing period decreased to one
day. The study calculated the maximum hydrogen utilization efficiency to be approximately 96%.
Açıklama
Anahtar Kelimeler
Anoxic denitrification, Membrane bioreactor (MBR), Fouling, Venturi, Hydrogen
Kaynak
Membranes
WoS Q Değeri
N/A
Scopus Q Değeri
Q2
Cilt
13
Sayı
7
Künye
Kayaalp, N. (2023). Anoxic treatment of agricultural drainage water in a venturi-integrated membrane bioreactor. Membranes, 13(7), 1-16.
