含盐废水生化处理耐盐污泥驯化的研究

对两种活性污泥,即高盐环境的海边污泥和普通废水处理厂的污泥进行了耐盐污泥对比驯化研究.结果表明:经过一定时间的驯化.两种污泥都可以驯化成具有高降解性能的耐盐污泥,且都能有效地处理含盐废水.驯化后海边污泥在NaCl质量浓度为35 000 ms/L,COD_(Cr)容积负荷为1.8 kg/(m~3·d)时,出水COD_(Cr)去除率可达到97%以上;而普通污泥在NaCl质量浓度为15 000 mg/L,COD_(Cr)容积负荷为1.55 kg/(m~3·d)时,出水COD_(Cr)去除率可达到94%以上.同时对两种污泥在驯化过程中的驯化特点、生物学过程及系统的抗冲击性能进行了比较研究.与普通污泥相比,海边污泥具有驯化期短、耐冲击性能强等特点.

Acclimation of salt-tolerant sludge for the biochemical treatment of salt-containing wastewater

The acchmation research of two kinds of activated sludge, one of which is from the coast and the other is from the common wastewater treatment plant, has been compared. The results show that after proper acclimation, salt-tolerant sludge with high degradation capacity can be formed from these two kinds of sludge, and can be used for treating salt-containing wastewater effectively. In the biological treatment process, when the NaCI concentration of the sludge from the coast is 35 000 mg/L, its COD_(Cr) volumetric loading is 1.8 kg/(m3·d), and COD_(Cr), removal rate of the effluent water is above 97% ; while by contrast with common sludge, the NaCl concentration is 15 000 mg/L, the COD_(Cr) volumetric loading is 1.55 kg/(m~3·d), and effluent COD_(Cr) removal rate is above 94%. At the same time, the characteristics of acclimation process, the biologically evolutionary process and the anti-shock performance of the two kinds of sludge are compared. Compared with the common sludge, the seaside sludge has the characteristics of short acclimation period, strong anti-shock performance and so on.