高盐度气田废水处理试验研究

以某污水厂好氧污泥为接种污泥,半软性纤维填料为载体,采用逐步提高盐度和有机负荷的方法对生物膜进行耐盐性和高有机负荷驯化。结果表明:经过一段时间驯化所得异养生物膜能够适应高盐度和高有机负荷的环境;生物膜对环境盐度变化的适应性有一定的波动;生物膜对有机物的降解能力随系统有机负荷增大而降低,连续进水、出水不回流且流量为0.292L/h,HRT为24h条件下,COD去除率最后保持在65%左右;COD去除率达到65%的时间与系统有机负荷呈线性正相关,相关系数为0.9112;驯化后耐盐微生物对温度和酸碱度不敏感,最佳生长温度为23℃,pH值为7~8。

Research on Waste Water Treatment of Natural Gas Field with High Salinity Content

An experiment was carried out with material of aerobic sludge from a sewage factory as inoculation sludge,and a half soft fabric filler as carrier.The characters of salt-tolerant acclimation and high organic load of the biomembrane was domesticated by increasing salinity and organic loading alternately gradually.The results showed that after extended period of acclimation,the heterotrophic biomembrane was able to adapt to the high salinity and organic load environment;the adaptability of biomembrane to salinity change was waved;the degeneration of the biomembrane to organic matter was reduced along with organic load increase of the system;the COD removal rate was maintained at 65% finally under the condition of continuous entering water,effluent flux 0.292L/h without back flow and 24h HRT;the time that COD removal rate reached 65% was positive correlated with the system's organic load,which correlation coefficient was 0.9112;the salt-tolerant microorganism was not so sensitive to temperature and pH value,and the best growth temperature and the best pH value were 23℃ and 7～8 respectively.