不同氮磷比条件下绿球藻对猪场污水的净化效率

发布时间：2018-09-18 12:09

【摘要】：采用添加NaH_2PO_4的方法调节猪场污水中氮磷比(N∶P)分别为8∶1、16∶1、32∶1和64∶1,以未添加NaH_2PO_4的污水为对照(氮磷比为532∶1),探讨一株耐污绿球藻(Chlorococcum sp.)在不同氮磷比污水中的生长性能及其对猪场污水(初始氨氮浓度为291.31 mg·L~(-1))的净化效果.结果表明:经过12 d的培养,绿球藻(接种密度为400×104cells·m L~(-1))在N∶P为64∶1的污水中生长最好,且对污水中氨态氮和总氮的去除效果最佳,细胞密度和生物量分别为3393×104cells·m L~(-1)和0.49 g·L~(-1),对氨态氮和总氮的去除率分别为74.94%和48.78%,显著高于对照组,氨态氮浓度降低到73.01 mg·L~(-1),总氮浓度降低到148.96 mg·L~(-1).培养期间各试验组污水中硝态氮浓度均升高.培养12 d后,N∶P为64∶1组污水中总磷浓度降低为3.07 mg·L~(-1),去除率为71.86%.综上,绿球藻在N∶P为64∶1的污水中生长性能及其对污水中氨态氮和总氮的去除效果均最佳,可使污水中的氨态氮和总磷浓度基本达到相关排放标准.
[Abstract]:The ratio of N to P (N: P) in wastewater of pig farm was adjusted by adding NaH_2PO_4 to 8: 1: 16: 1: 32: 1 and 64: 1, respectively. Using the wastewater without NaH_2PO_4 as control (nitrogen / phosphorus ratio was 532: 1), a stain tolerant Chlorella aeruginosa (Chlorococcum sp.) strain was studied. The growth performance and purification effect of pig farm wastewater (initial ammonia nitrogen concentration of 291.31 mg L ~ (-1) in wastewater with different nitrogen and phosphorus ratios were studied. The results showed that Chlorella aeruginosa (inoculation density was 400 脳 104cells mL ~ (-1) grew best in the wastewater with N: P = 64:1, and the removal efficiency of ammonia nitrogen and total nitrogen was the best after 12 days culture. The cell density and biomass were 3393 脳 104cells mL ~ (-1) and 0.49 g / L ~ (-1), respectively. The removal rates of ammonia nitrogen and total nitrogen were 74.94% and 48.78%, respectively, which were significantly higher than those of the control group. The ammonia nitrogen concentration decreased to 73.01 mg L ~ (-1) and the total nitrogen concentration to 148.96 mg L ~ (-1). During the culture period, the concentration of nitrate nitrogen in the sewage of each experimental group increased. After 12 days of culture, the total phosphorus concentration in the effluent of the 64:1 group was reduced to 3.07 mg L ~ (-1), and the removal rate was 71.86%. In conclusion, the growth performance of Chlorophyta in the wastewater with N: P = 64:1 and the removal efficiency of ammonia nitrogen and total nitrogen in wastewater are the best, and the concentration of ammonia nitrogen and total phosphorus in sewage can basically reach the relevant discharge standard.
【作者单位】：上海海洋大学农业部淡水水产种质资源重点实验室;上海市水产养殖工程技术研究中心;水产动物遗传育种中心上海市协同创新中心(ZF1206);
【基金】：上海市科技兴农项目[沪农科攻字(2015)第1-2号]~~
【分类号】：X173;X713

【相似文献】