可以帮我翻译一下吗

Both fluidized carrier and membrane processes have been
extensively studied for biological wastewater treatment.
Retained microbial processes using porous carrier has been
applied in terms of high concentration culture of microbes
[1] or multifunctional microbial reaction such as simultaneous
removal of carbonaceous and nitrogenous substances
from wastewater [2,3]. The influence of substrate concentration
on simultaneous nitrification and denitrification
using fluidized bed reactors has been investigated for the
wastewater containing inorganic carbon [4,5] and organic
substance [6–9]. Inorganic carbon supplements accelerated
the nitrifying reaction, while a higher concentration of
organic substance suppressed it. Because the organic substances
are dominantly utilized by heterotrophic bacteria as
carbon source, there is a competition between nitrifiers and
fast-growing heterotrophic bacteria for available dissolved
oxygen (DO) in the surface region of the carrier [10].