Yu H Q, Tay J H, Fang H H
Environmental Engineering Research Centre, Department of Civil Engineering, Hong Kong University, Hong Kong.
Water Res. 2001 Mar;35(4):1052-60. doi: 10.1016/s0043-1354(00)00345-6.
Six upflow anaerobic sludge blanket (UASB) reactors were concurrently operated for 146 d to examine the effects of calcium on the sludge granulation process during start-up. Introduction of Ca2+ at concentrations from 150 to 300 mg/l enhanced the biomass accumulation and granulation process. The calcium concentration in the granules was nearly proportional to the calcium concentration in the feed, and calcium carbonate was the main calcium precipitate in the granules. The specific activity of granules decreased with increasing influent calcium concentration. The optimum calcium concentration for the granulation was from 150 to 300 mg/l. The addition of low-concentration calcium to the UASB reactors appeared to enhance the three steps of sludge granulation: adsorption, adhesion and multiplication, but it did not lead to a different proliferation of predominant microorganisms in the granules.
同时运行六个上流式厌氧污泥床（UASB）反应器146天，以研究钙在启动过程中对污泥颗粒化过程的影响。以150至300mg/l的浓度引入Ca2+可促进生物量积累和颗粒化过程。颗粒中的钙浓度与进料中的钙浓度几乎成正比，碳酸钙是颗粒中主要的钙沉淀物。颗粒的比活性随进水钙浓度的增加而降低。颗粒化的最佳钙浓度为150至300mg/l。向UASB反应器中添加低浓度钙似乎增强了污泥颗粒化的三个步骤：吸附、粘附和增殖，但并未导致颗粒中主要微生物的不同增殖。
