摘要
利用细菌再生长潜力 (BacterialRegrowthPotential,BRP)的微生物分析方法 ,研究了水中的磷对其生物稳定性的限制因子作用 .试验测试水样为经过净水工艺处理后的出水 ,净水工艺处理的原水取自我国北方某水库 .结果表明 ,在测试水样中添加 5 0 μg/L的PO3- 4 P(NaH2 PO4 )后 ,水样的BRP增加了 1 0 0 %～ 2 3 5 %.在水样中添加各种无机盐后得到的BRP同仅添加NaH2 PO4 得到的结果相差不大 ,而在水样中添加 1mg/L的乙酸碳 (NaAc)后BRP只增加了 3 0 %～ 40 %,大大小于只添加磷的水样 ,这表明在该水样中磷是细菌生长的限制因子 .本试验说明 ,有效地去除水中的磷可以作为限制饮用水中细菌再生长 。
In the experiment, a bioassay called Bacterial Regrowth Potential (BRP) was used to investigate the effect of phosphorus on bacterial regrowth in the water sample that was made from some raw water taken from a reservoir located in northern China. It was shown that BRP of water sample increased about 100%～235% when 50μg/L PO 3- 4 P (as NaH 2PO 4) was added alone. BRP of water sample with various inorganic nutrients (including phosphate) addition had the similar increase compared with BRP of water sample with only 50μg/L PO 3- 4 P addition and BRP of water sample with acetate\|C of 1mg/L addition increased only 30%～40%. These results were clear evidence of phosphorus limitation on bacteria regrowth in the water sample investigated in the experiment. This observation offered novel possibility to restrict microbial regrowth in water distribution system by developing technologies to remove phosphorus efficiently from drinking water.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第4期81-84,共4页
Environmental Science
基金
科技部重大科技项目 (95 5 0 6 1 0 4 0 0 0 5 0 3)
关键词
细菌再生长
磷
可同化有机碳
饮用水
生物稳定性
bacterial regrowth
phosphorus
assimilable organic carbon(AOC)
drinking water
biological stability
