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	<title>scum &#8211; BIOENGINEER.ORG</title>
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		<title>Electronic nose tracks foul scum odors in Tokyo&#8217;s urban rivers</title>
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		<pubDate>Sun, 18 Oct 2026 01:55:05 +0000</pubDate>
				<category><![CDATA[Technology]]></category>
		<category><![CDATA[affecting]]></category>
		<category><![CDATA[dissolved oxygen]]></category>
		<category><![CDATA[electronic nose]]></category>
		<category><![CDATA[factors]]></category>
		<category><![CDATA[formation]]></category>
		<category><![CDATA[Hydrogen sulfide]]></category>
		<category><![CDATA[odor monitoring]]></category>
		<category><![CDATA[salinity intrusion]]></category>
		<category><![CDATA[scum]]></category>
		<category><![CDATA[scum formation]]></category>
		<category><![CDATA[Tokyo rivers]]></category>
		<category><![CDATA[urban estuary]]></category>
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					<description><![CDATA[A study of Tokyo's Shakujii and Sumida Rivers combined hourly monitoring with electronic nose technology to show that scum forms when dissolved oxygen falls below 6 mg/L and salinity drops under 1 psu, with organic acids and hydrogen sulfide identified as the primary odor compounds.]]></description>
		
		
		
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