Co-degradation of resorcinol and catechol in an UASB reactor.
Co-degradation of resorcinol and catechol was studied in a catechol acclimated up flow anaerobic sludge blanket (UASB) reactor. Synthetic binary aqueous solution having a total concentration of 1000 mg/L with the resorcinol/catechol (R/C) ratio of 1/19, 1/9, 3/17, 1/4, 1/3, 3/7, 2/3 and then 1/3 was fed at various time intervals to the UASB reactor with a fixed organic loading rate of 5.7 kg COD/m(3) d and hydraulic retention time of 8h. The reactor was operated over a period of 145 days after its acclimation with catechol bearing synthetic wastewater at a constant feed rate of 1.2 L/h. When the resorcinol concentration was increased to have a R/C ratio of 1/4, the COD removal efficiency and the biogas production increased to the maximum levels. Pseudo steady state condition for COD removal was achieved at each of the stepped-up loading condition. An increase in the R/C ratio above 1/4 in the binary feed solution led to a decrease in the COD removal efficiency and the biogas production rate.
Subramanyam
Revanuru
R
Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee-247 667, Uttarakhand, India.
Mishra
I M
IM
D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002396:Catechols / Q000032:analysis*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D004867:Equipment Design; D005740:Gases; D008956:Models, Chemical; D012118:Resorcinols / Q000032:analysis*; D012722:Sewage; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods
D002396:Catechols; D005740:Gases; D012118:Resorcinols; D012722:Sewage; C034221:catechol; C031389:resorcinol