摘要：

研究经生化处理的牛口峪水库石化污水,回用于循环冷却水时不同浓度的Ca²⁺ 、Mg²⁺ 、Fe^2- 、Cl^-、SO₄³⁺对细菌生长及杀菌性能的影响。结果表明 :Ca²⁺ 对铁细菌生长有促进作用,对异养菌的生长没有影响 ;Mg²⁺ 对异养菌和铁细菌生长有促进作用,而Fe³⁺ 过多不利于铁细菌的生长,但对异养菌生长没有影响 ;上述三种离子对杀菌剂优氯净和 12 2 7的杀菌性能均没有影响。Cl-在 10 0～ 4 0 0mg/L,SO42 -在 10 0～ 30 0mg/L对异养菌和铁细菌生长及优氯净的杀菌效果均没有影响,而异噻唑啉酮杀菌剂则不适合用作牛口峪水库污水回用的杀菌剂。

关键词: 污水回用, 细菌生长, 杀菌性能

Abstract:

Effects of Ca²⁺, Mg²⁺, Fe³⁺, Cl^-and SO₄^2-with different concent rations on bacteria growth and bactericidal perfo rmance when Niukouyu Reservoir wastewater is reused as cooling water have been studied.The results show that Ca²⁺can facilitate iron bacteria growth, but has no ef fect on bacteria.Mg²⁺ facilitates bacteria and iron bacteria growth.More Fe³⁺goes against iron bacteria growth, but has no effect on bacteria grow th.All three ions have no effect on the bactericidal perfo rmance of dichloro-iso-cyanuric acid sodium salt and dodecyldimethyl benzy lammonium chloride.Cl^-concent ration between 100 ～ 400 mg/L has no effect on the bactericidal performance of dichlo ro-iso-cyanuric acid sodium salt.The same result is acquired while SO₄^2- concentration is between 100 ～ 300 mg/L.Iso thiazolin is not suitable for being used as bactericide in Niukouyu wastewater reuse.

Key words: waste water reuse, bacteria growth, bactericidal performance

中图分类号: 

• TQ085