Water quality — Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms
文件核验信息（付费前可核对）
标准范围（官方英文摘要）
ISO 9509:2006 specifies a method for assessing the short-term inhibitory effect of waters, waste waters or test substances on nitrifying bacteria in activated sludge. The inhibitory effect is estimated over an exposure period of usually 3 h or up to 24 h with weakly nitrifying sludge.
The method is applicable to nitrifying activated sludge derived from domestic and synthetic sewage and also to sludges from industrial and mixed domestic and industrial waste waters.
The nitrifying activity of the sludge is verified by testing in the presence and absence of a specific inhibitor. If the nitrification rate is within a suitable range for the test, i.e. 2 mg of nitrogen per gram of suspended solid and hour to 6,5 mg of nitrogen per gram of suspended solids and hour, the sludge may be used directly. If not, adjustments are necessary.
The method is applicable to water-soluble, non-volatile chemicals, and to waste waters
标准信息
- 标准号
- ISO 9509:2006
- 英文标题
- Water quality — Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms
- 发布单位
- —
- 技术委员会
- ISO/TC 147/SC 5
- 版本 / 版次
- 2
- 状态
- 现行
- 发布日期
- 2006
- ICS 分类
- 13.060.70 水的生物学特性的检验
- 页数
- 12 页
- 官方定价
- CHF 63
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