EGSB reactor setup
A Perspex laboratory-scale EGSB reactor was operated continuous
treatment of fresh leachate. The reactor has an effective volume
of 3 L, with an internal diameter of 60 mm and a
height-to-diameter ratio of 12:1 in the reaction zone. The temperature
of the reactor was controlled at 33 ± 1 C using a thermostatic
heater, while the liquid up-flow velocity was maintained at
1.8 m/h. The organic loading rate (OLR) was gradually increased
by increasing the influent concentration of the leachate.
The operation time of the reactor was divided into three periods.
During period 1 (day 0–60), the COD concentration of the feed
was increased stepwise from 2000 to 17,700 mg/L through dilution
of the raw fresh leachate from MSW incineration plant to the
desired COD concentration under a constant hydraulic retention
time (HRT) of 2.5 d. The NH4 + –N concentration in influent was in
the range of 30–180 mg/L. During period 2 (day 61–190), the
NH4 + –N concentration in influent was gradually increased to
1000 mg/L, maintaining 17,700 mg/L of COD concentration in
influent. During period 3 (day 191–225), the NH4 + –N concentration
in influent was directly decreased to 180 mg/L keeping COD concentration
in influent. During the entire periods of operation, the
concentrations of COD, NH4 + –N in influent and effluent, as well as
methane volume, were monitored every two days.
EGSB reactor setupA Perspex laboratory-scale EGSB reactor was operated continuoustreatment of fresh leachate. The reactor has an effective volumeof 3 L, with an internal diameter of 60 mm and aheight-to-diameter ratio of 12:1 in the reaction zone. The temperatureof the reactor was controlled at 33 ± 1 C using a thermostaticheater, while the liquid up-flow velocity was maintained at1.8 m/h. The organic loading rate (OLR) was gradually increasedby increasing the influent concentration of the leachate.The operation time of the reactor was divided into three periods.During period 1 (day 0–60), the COD concentration of the feedwas increased stepwise from 2000 to 17,700 mg/L through dilutionof the raw fresh leachate from MSW incineration plant to thedesired COD concentration under a constant hydraulic retentiontime (HRT) of 2.5 d. The NH4 + –N concentration in influent was inthe range of 30–180 mg/L. During period 2 (day 61–190), theNH4 + –N concentration in influent was gradually increased to1000 mg/L, maintaining 17,700 mg/L of COD concentration ininfluent. During period 3 (day 191–225), the NH4 + –N concentrationin influent was directly decreased to 180 mg/L keeping COD concentrationin influent. During the entire periods of operation, theconcentrations of COD, NH4 + –N in influent and effluent, as well asmethane volume, were monitored every two days.
การแปล กรุณารอสักครู่..
