运用动力学模型研究盐度对厌氧生物的抑制作用

分别用未经盐驯化的污泥和经10 g/L及20 g/L盐驯化过的污泥对废水中化学耗氧量的降解性能进行对比研究,并研究盐度对厌氧生物的抑制特性.研究结果表明:用未经盐驯化的污泥处理含盐水样,当水样中含盐量小于或等于20 g/L时,盐对厌氧生物降解葡萄糖的抑制类型是反竞争型;当水样中含盐量达到30 g/L时,抑制类型属混合竞争型;用经10 g/L和20 g/L盐驯化的污泥处理含盐废水,当处理的废水含盐量与驯化污泥的盐浓度相同或相近时,驯化污泥时该种环境呈现较好的适应性;反之,当用驯化污泥处理与驯化污泥盐浓度相差较大的废水时,驯化污泥对微生物降解产生一定的抑制作用,且浓度相差越大,抑制作用越明显.

Application of dynamics model to salinity inhibiting anaerobe

The removal of chemical oxygen demand of wasterwater by anaerobic sludge cultivated without or with 10g/L and 20g/L salt was comparatively studied, and the characteristic of salt inhibition to anaerobic microorganisms was deeply investigated. The experimental results show that in the treatment of saliniferous wastewater by sludge cultivated without salt, when the influent salinity is below 20 g/L, the salt inhibition type of anaerobic microorganisms biodegradation glucose wastewater is anti-competitive; when the influent salinity arrives at 30g/L, the salt inhibition type is mix-competitive. Treating the wastewater with sludge cultivated by 10g/L and 20g/L salt, when the influent salinity is similar to that of sludge, the sludge cultivated by salt would be better adapted in the environment with salt ; otherwise , when the influent salinity is different from that of sludge, it would inhibit anaerobic microorganisms biodegradation, and the greater the salinity difference the more obvious the inhibition.