the control system until the fourth day, and it was clearly influenced by the ozonetreated landfill leachate during the first 7 days.
9.3.12 Fluidized Bed-Treated Landfill Leachate
From the addition of fluidized bed-treated landfill leachate, all microbial species
except for Lecane sp. and Aeolosoma hemprichi survived and were coexisting on the
28th day in the 100% addition system, and it was estimated that the influence of
fluidized bed-treated landfill leachate was minimal because the microbial interactions among producers, consumers, and decomposers were maintained. This tendency did not change in the lower addition systems until 10% addition, and the
concentration at which all microbial species, including Lecane sp. and Aeolosoma
hemprichi, could coexist was estimated as less than 10%. This is due to the fact that
Lecane sp. and Aeolosoma hemprichi lack resistance to fluidized bed-treated landfill
leachate. In comparison with untreated landfill leachate and ozone-treated landfill
leachate, in which almost all microbial species became extinct at concentrations of
more than 5%, the influence of fluidized bed-treated landfill leachate on the ecosystem was clearly reduced. Namely, it was clear that landfill leachate that may greatly
influence ecosystems can be changed to treated water, which has a lesser influence
on the ecosystem through the use of fluidized bed treatment.
9.3.13 Ozone + Fluidized Bed-Treated Landfill Leachate
The results of the addition of ozone + fluidized bed-treated landfill leachate were
similar to those from the addition of fluidized bed-treated landfill leachate; all
microbial species, except for Lecane sp. and Aeolosoma hemprichi, survived and
were coexisting on the 28th day in the 100% addition system. It was estimated that
the influence of ozone + fluidized bed-treated landfill leachate was also minimal
because the microbial interactions were maintained, and this tendency did not
change in lower addition systems until 10% addition. The concentration at which
all microbial species, including Lecane sp. and Aeolosoma hemprichi, could coexist
was estimated as less than 10%. This is due to the fact that neither Lecane sp. nor
Aeolosoma hemprichi are resistant to ozone + fluidized bed-treated landfill leachate.
In comparison with the ozone-treated landfill leachate, in which almost all microbial
species became extinct at concentrations of more than 5%, the influence of ozone +
fluidized bed-treated landfill leachate on the ecosystem was clearly reduced. It is
thought that this is because the aldehyde or carboxylic acid, which are by-products of
ozone treatment, was decomposed and mineralized by fluidized bed treatment. Put
succinctly, it was made clear that the ozone-treated landfill leachate, which greatly
influences the ecosystem, can be converted to treated water, with a reduced influence
on the ecosystem by combination with fluidized bed treatment. From these results,
184
Y. Inamori et al.
9.3.12 Fluidized Bed-Treated Landfill Leachate
From the addition of fluidized bed-treated landfill leachate, all microbial species
except for Lecane sp. and Aeolosoma hemprichi survived and were coexisting on the
28th day in the 100% addition system, and it was estimated that the influence of
fluidized bed-treated landfill leachate was minimal because the microbial interactions among producers, consumers, and decomposers were maintained. This tendency did not change in the lower addition systems until 10% addition, and the
concentration at which all microbial species, including Lecane sp. and Aeolosoma
hemprichi, could coexist was estimated as less than 10%. This is due to the fact that
Lecane sp. and Aeolosoma hemprichi lack resistance to fluidized bed-treated landfill
leachate. In comparison with untreated landfill leachate and ozone-treated landfill
leachate, in which almost all microbial species became extinct at concentrations of
more than 5%, the influence of fluidized bed-treated landfill leachate on the ecosystem was clearly reduced. Namely, it was clear that landfill leachate that may greatly
influence ecosystems can be changed to treated water, which has a lesser influence
on the ecosystem through the use of fluidized bed treatment.
9.3.13 Ozone + Fluidized Bed-Treated Landfill Leachate
The results of the addition of ozone + fluidized bed-treated landfill leachate were
similar to those from the addition of fluidized bed-treated landfill leachate; all
microbial species, except for Lecane sp. and Aeolosoma hemprichi, survived and
were coexisting on the 28th day in the 100% addition system. It was estimated that
the influence of ozone + fluidized bed-treated landfill leachate was also minimal
because the microbial interactions were maintained, and this tendency did not
change in lower addition systems until 10% addition. The concentration at which
all microbial species, including Lecane sp. and Aeolosoma hemprichi, could coexist
was estimated as less than 10%. This is due to the fact that neither Lecane sp. nor
Aeolosoma hemprichi are resistant to ozone + fluidized bed-treated landfill leachate.
In comparison with the ozone-treated landfill leachate, in which almost all microbial
species became extinct at concentrations of more than 5%, the influence of ozone +
fluidized bed-treated landfill leachate on the ecosystem was clearly reduced. It is
thought that this is because the aldehyde or carboxylic acid, which are by-products of
ozone treatment, was decomposed and mineralized by fluidized bed treatment. Put
succinctly, it was made clear that the ozone-treated landfill leachate, which greatly
influences the ecosystem, can be converted to treated water, with a reduced influence
on the ecosystem by combination with fluidized bed treatment. From these results,
184
Y. Inamori et al.