{"id":594996,"date":"2024-11-05T21:39:46","date_gmt":"2024-11-05T21:39:46","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-155221999\/"},"modified":"2024-11-05T21:39:46","modified_gmt":"2024-11-05T21:39:46","slug":"iso-155221999","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-155221999\/","title":{"rendered":"ISO 15522:1999"},"content":{"rendered":"<p>This International Standard specifies a method for assessing the potential toxicity of a test material to the growth of<\/p>\n<p>aerobic bacteria present in activated sludge. The inhibitory effect is restricted to those microorganisms capable of<\/p>\n<p>growth on the chosen organic test medium.<\/p>\n<p>This method gives information on inhibitory effects on the microorganisms over incubation periods up to 6 h.<\/p>\n<p>This method is applicable to water, wastewater and chemical substances which are soluble under the conditions of<\/p>\n<p>the test. Special care is needed with volatile or coloured materials and materials which form turbid suspensions or<\/p>\n<p>dispersions.<\/p>\n<p>NOTE 1 Results with volatile test material should be interpreted with caution and are likely to underestimate any inhibitory<\/p>\n<p>effect because of the difficulties in maintaining the initial concentration in the test flasks.<\/p>\n<p>NOTE 2 Coloured materials and materials of low water-solubility which form turbid suspensions or dispersions can be tested<\/p>\n<p>in many cases using colour\/turbidity controls as blanks (see 9.4).<\/p>\n<p>NOTE 3 Inhibitory effects on activated sludge microorganisms of test materials for which this test is not applicable can be<\/p>\n<p>determined by using an inhibition test based on respirometric measurements (see ISO 8192).<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Water quality \u2014 Determination of the inhibitory effect of water constituents on the growth of activated sludge microorganisms<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/iso\/\"><b>ISO<\/b><\/a><\/td>\n<td>1999-06<\/td>\n<td>18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":595007,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[218,2634],"product_tag":[],"class_list":{"0":"post-594996","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-060-70","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/594996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/595007"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=594996"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=594996"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=594996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}