厌氧颗粒污泥对五氯酚(PCP)的吸附、解吸及生物降解

以未驯化污泥接种的升流式厌氧污泥床反应器可形成降解五氯酚（PCP）的颗粒污泥．颗粒污泥去除PCP的主要机制是生物降解作用，而不是生物吸附作用．PCP在颗粒污泥上的吸附和解吸符合Freundlich等温方程，吸附和解吸的Freundlich常数K、1/n分别为0.7857mg/gSS、0.5079和1.1095mg/gSS、0.3782，部分PCP被不可逆吸附．与其它活或死的生物材料相比，本试验形成的颗粒污泥对PCP吸附量较小．该方程较准确地表达了UASB反应器内厌氧颗粒污泥对PCP吸附量的变化规律．

Biosorption, desorption and biodegradation of pentachlorophenol (PCP) by anerobic granular sludge in an upflow anerobic sludge blanket (UASB) reactor

Granular sludge degrading PCP would be developed in an UASB reactor treating wastewater containing PCP, as the reactor is seeded with unadapted sludge. The sorption isotherm and desorption isotherm of PCP by the granular sludge were determined, and the data fitted to the Freundlich equation. The Freundlich constant K and 1/n were 0.7857mg/gSS and 0.5079(r 2=0.9793) for the sorption, and 1.1095mg/gSS and 0.3782(r 2=0.9736) for desorption, respec tively. This indicated that a part of PCP was irreversibly sorbed to the biomass. The sorption capacity by anerobic sludge granules was much weaker than its previously reported sorption by other live or dead biological materials. With empiri cally determined constants from this study, the Freundlich model can describe the partitioning behavior of PCP in the UASB reactor reasonably well. PCP removal by the granules was due to biodegradation rather than sorption.