多孔高分子载体固定化微生物厌氧流化床处理低浓度废水的研究

Studies on Low Concentration Wastewater Treatment in an Anaerobic Fluidized Bed with Immobilization of Microbes on the Porous Polymer Support

本文报道用厌氧流化床反应器处理低浓度有机废水的可行性研究结果。采用多孔高分子载体固定厌氧微生物和流态化技术强化传质过程，可克服低浓度有机废水甲烷化能力低的障碍。实验表明，在３５±１℃条件下，处理ＣＯＤ浓度为１６００ｍｇ／Ｌ的人工葡萄糖废水，床层最优膨胀率为５０％，容积有机负荷率为１９．２ｇＣＯＤ／（Ｌ·ｄ），ＣＯＤ去除率达７０％；处理ＣＯＤ浓度为２２０～２５０ｍｇ／Ｌ的城市污水，容积有机负荷率为２．４～２．６ｇＣＯＤ／（Ｌ·ｄ），ＣＯＤ去除率为５４％～５６％。

The achievability research result of treatment of low concentration organic wastewater with an anaerobic fluidized bed is reported. Using immobilization microbes on the porous polymer support and intensified process of mass transfer by fluidization technology, the obstructes of the low methane production at low concentration organic wastewater in the conventional method were surmounted. The experiment results showed that, under mesophilic digestion (35±1℃),when the substrate concentration of influent with synthetic glucose wastewater was 1600 mg COD/L ,the optimal expansion rate of bed, the volumetric organic loading rate and the COD removal rate was 50%, 19.2 gCOD/(L·d) and 70%,respectively. When the substrate concentration of influent with domestic sewage was 220～250 mgCOD/L,the volumetric organic loading rates and COD removal rates were 2.4～2.6g COD/(L.d) and 54%～56%, respectively.