Graphical Method for Calculating Biochemical Oxygen Demand
A new method for handling the data from a series of biochemical oxygen demand dilutions consists of graphing the dissolved oxygen remaining in each dilution verus the volume of sample added. The demand is then calculated from the best straight line using the equation: Demand = (slope × sample volume...
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| Veröffentlicht in: | Journal - Water Pollution Control Federation 1979-09, Vol.51 (9), p.2257-2266 |
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| container_title | Journal - Water Pollution Control Federation |
| container_volume | 51 |
| creator | Klein, Robert L. Gibbs, Charles R. |
| description | A new method for handling the data from a series of biochemical oxygen demand dilutions consists of graphing the dissolved oxygen remaining in each dilution verus the volume of sample added. The demand is then calculated from the best straight line using the equation: Demand = (slope × sample volume) - y intercept + sample dissolved oxygen. No initial dissolved oxygen determinations are required. The oxygen demand of the dilution water and of the seed are automatically compensated for in the calculation. It is no longer necessary to attempt to keep the dilution water blank below 0.2 mg/l. Results from a wastewater treatment plant show that the graphical method is advantageous in practical situations. |
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The demand is then calculated from the best straight line using the equation: Demand = (slope × sample volume) - y intercept + sample dissolved oxygen. No initial dissolved oxygen determinations are required. The oxygen demand of the dilution water and of the seed are automatically compensated for in the calculation. It is no longer necessary to attempt to keep the dilution water blank below 0.2 mg/l. Results from a wastewater treatment plant show that the graphical method is advantageous in practical situations.</description><identifier>ISSN: 0043-1303</identifier><language>eng</language><publisher>Water Pollution Control Federation</publisher><subject>Bacteria ; Biochemical oxygen demand ; Error rates ; Line graphs ; Outliers ; Oxygen ; Slope of a line ; Standard deviation ; Wastewater ; Water samples</subject><ispartof>Journal - Water Pollution Control Federation, 1979-09, Vol.51 (9), p.2257-2266</ispartof><rights>Copyright 1979 Water Pollution Control Federation</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/25040413$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/25040413$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,57992,58225</link.rule.ids></links><search><creatorcontrib>Klein, Robert L.</creatorcontrib><creatorcontrib>Gibbs, Charles R.</creatorcontrib><title>Graphical Method for Calculating Biochemical Oxygen Demand</title><title>Journal - Water Pollution Control Federation</title><description>A new method for handling the data from a series of biochemical oxygen demand dilutions consists of graphing the dissolved oxygen remaining in each dilution verus the volume of sample added. 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Results from a wastewater treatment plant show that the graphical method is advantageous in practical situations.</description><subject>Bacteria</subject><subject>Biochemical oxygen demand</subject><subject>Error rates</subject><subject>Line graphs</subject><subject>Outliers</subject><subject>Oxygen</subject><subject>Slope of a line</subject><subject>Standard deviation</subject><subject>Wastewater</subject><subject>Water samples</subject><issn>0043-1303</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1979</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNotjstOwzAQAH0AqaX0Eyr5ByKtvU5ic2sDFKSiXui52sbrJlEelRMk-vcg6Gkuo9HciTmAwUQh4Ew8jGMDgGCVnYunbaRLVZfUyg-eqsHLMERZUFt-tTTV_Vlu6qGsuPtT9t_XM_fymTvq_aO4D9SOvLxxIQ6vL5_FW7Lbb9-L9S5pFORTQmxPRumQ-WCVDydHqUl1YJdj5tlpYyFkKSinqOTfLa9zZ4IJgBkq5ywuxOq_24zTEI-XWHcUr0edggGjEH8AY2Q-7w</recordid><startdate>19790901</startdate><enddate>19790901</enddate><creator>Klein, Robert L.</creator><creator>Gibbs, Charles R.</creator><general>Water Pollution Control Federation</general><scope/></search><sort><creationdate>19790901</creationdate><title>Graphical Method for Calculating Biochemical Oxygen Demand</title><author>Klein, Robert L. ; Gibbs, Charles R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j107t-ae8b412f6df81dfb9a5452fe9736de92480f650191ace030d2794f4f036319983</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1979</creationdate><topic>Bacteria</topic><topic>Biochemical oxygen demand</topic><topic>Error rates</topic><topic>Line graphs</topic><topic>Outliers</topic><topic>Oxygen</topic><topic>Slope of a line</topic><topic>Standard deviation</topic><topic>Wastewater</topic><topic>Water samples</topic><toplevel>online_resources</toplevel><creatorcontrib>Klein, Robert L.</creatorcontrib><creatorcontrib>Gibbs, Charles R.</creatorcontrib><jtitle>Journal - Water Pollution Control Federation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Klein, Robert L.</au><au>Gibbs, Charles R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Graphical Method for Calculating Biochemical Oxygen Demand</atitle><jtitle>Journal - Water Pollution Control Federation</jtitle><date>1979-09-01</date><risdate>1979</risdate><volume>51</volume><issue>9</issue><spage>2257</spage><epage>2266</epage><pages>2257-2266</pages><issn>0043-1303</issn><abstract>A new method for handling the data from a series of biochemical oxygen demand dilutions consists of graphing the dissolved oxygen remaining in each dilution verus the volume of sample added. The demand is then calculated from the best straight line using the equation: Demand = (slope × sample volume) - y intercept + sample dissolved oxygen. No initial dissolved oxygen determinations are required. The oxygen demand of the dilution water and of the seed are automatically compensated for in the calculation. It is no longer necessary to attempt to keep the dilution water blank below 0.2 mg/l. Results from a wastewater treatment plant show that the graphical method is advantageous in practical situations.</abstract><pub>Water Pollution Control Federation</pub><tpages>10</tpages></addata></record> |
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| identifier | ISSN: 0043-1303 |
| ispartof | Journal - Water Pollution Control Federation, 1979-09, Vol.51 (9), p.2257-2266 |
| issn | 0043-1303 |
| language | eng |
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| source | Jstor Complete Legacy |
| subjects | Bacteria Biochemical oxygen demand Error rates Line graphs Outliers Oxygen Slope of a line Standard deviation Wastewater Water samples |
| title | Graphical Method for Calculating Biochemical Oxygen Demand |
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