BS 6068-5.25-1999 水质.生物法.水体组分对活性污泥中微生物增长抑制影响的测定

标准号：BS 6068-5.25-1999
中文标准名称：水质.生物法.水体组分对活性污泥中微生物增长抑制影响的测定
英文标准名称：Water quality - Biological methods - Determination of the inhibitory effect of water constituents on the growth of activated sludge microorganisms - Section 5.25 Determination of the inhibitory effect of water constituents on the growth of activated sludg
标准类型：Z16
发布日期：1999/8/15 12:00:00
实施日期：1999/8/15 12:00:00
中国标准分类号：Z16
国际标准分类号：07.100.20
适用范围：This International Standard specifies a method for assessing the potential toxicity of a test material to the growth of aerobic bacteria present in activated sludge. The inhibitory effect is restricted to those microorganisms capable of growth on the chosen organic test medium. This method gives information on inhibitory effects on the microorganisms over incubation periods up to 6 h. This method is applicable to water, wastewater and chemical substances which are soluble under the conditions of the test. Special care is needed with volatile or coloured materials and materials which form turbid suspensions or dispersions. NOTE 1 Results with volatile test material should be interpreted with caution and are likely to underestimate any inhibitory effect because of the difficulties in maintaining the initial concentration in the test flasks. NOTE 2 Coloured materials and materials of low water-solubility which form turbid suspensions or dispersions can be tested in many cases using colour/turbidity controls as blanks (see 9.4). NOTE 3 Inhibitory effects on activated sludge microorganisms of test materials for which this test is not applicable can be determined by using an inhibition test based on respirometric measurements (see ISO 8192).