{"id":1134,"date":"2024-08-11T02:16:56","date_gmt":"2024-08-10T19:16:56","guid":{"rendered":"http:\/\/www.tneutron.net\/pangan\/?p=1134"},"modified":"2024-08-07T07:47:22","modified_gmt":"2024-08-07T00:47:22","slug":"dissolved-biochemical-oxygen","status":"publish","type":"post","link":"https:\/\/www.tneutron.net\/pangan\/dissolved-biochemical-oxygen\/","title":{"rendered":"Dissolved and Biochemical Oxygen"},"content":{"rendered":"

tool:<\/strong><\/span>
\n – Wardrobe BOD incubator with a temperature range of -10 to 50 0<\/sup> C and was stabilized at 20 0<\/sup> C at the test temperature<\/span>
\n – BOD Bottle 300 ml<\/span>
\n – Aerator<\/span>
\n – Measuring cup 100 ml<\/span>
\n – The glass cup 100 ml<\/span>
\n – Equipment for testing dissolved oxygen in accordance with the scale of SNI M-10-1990-F<\/span><\/p>\n

Material :<\/strong><\/span>
\n – Solution diluent<\/span>
\n – Solution of sodium hydroxide, NaOH, 0.1 N<\/span>
\n – Sulphuric acid solution, H2SO4, 0.1 N<\/span>
\n – Sodium Sulfite Na2SO3 solution, 0.025<\/span><\/p>\n

Ways of working:<\/strong><\/span>
\n – Provide the test sample has been taken in accordance with the sampling method of water quality testing SNI 06-2412-1991<\/span>
\n – Measure 100 ml of sample in duplicate and input into the beaker 200 ml<\/span>
\n – If the test sample is acidic or alkaline, neutralize with 0.1 N NaOH or H2SO4 to between pH 6.5 – 7.5<\/span>
\n – If the sample contains residual chlorine, Cl 2, add 0.025 N Na2SO3 solution until all missing<\/span>
\n – If the sample contains no micro organisms additional 1000 ml diluent solution so pengencaran 2 times.<\/span>
\n – If the test sample is estimated to have a BOD of more than 6 mg \/ l, dilute the test sample with diluent solution so that BOD levels between 3-6 mg \/ l<\/span>
\n – Aeration with Aerator for 10 minutes until dissolved oxygen 7-8 mg \/ l<\/span>
\n – Put into 2 pieces BOD bottles of 300 ml overflow<\/span>
\n – Then close the BOD bottle, avoid turbulence of air bubbles during filling<\/span>
\n – Samples are ready to test<\/span><\/p>\n

Preparation of the test:<\/strong><\/span>
\n Prepare test equipment and supporting material for testing dissolved oxygen in accordance with SNI 06-2424-1991 Test method:<\/span>
\n – Check the levels of dissolved oxygen zero days of one BOD bottle containing the specimen in accordance with the testing method of oxygen dissolved in the water, ISO-2424-1991<\/span>
\n – Put BOD bottle containing the specimen into the closet incubating temperature of 20 0<\/sup> C<\/span>
\n – Eramkan for 5 days<\/span>
\n – Check the level of oxygen dissolved five days in accordance with the testing methods of dissolved oxygen in water SNI 06-2424-1991<\/span>
\n – If the sample was diluted, do step 1 to 4 of the diluent solution to pengencaran blank<\/span><\/p>\n

Calculation:<\/strong><\/span>
\n Calculate the BOD levels by using the formula:<\/span>
\n (1) Samples undiluted BOD = C0 – C5<\/span>
\n (2) Samples were diluted BOD = C0 – C5 – k (AP0 – AP5) xp<\/span><\/p>\n

Information:<\/u><\/span>
\n C0: OT Levels mg \/ l zero day test object<\/span>
\n C5: OT Levels mg \/ l five day test object<\/span>
\n Ap0: OT Levels zero day diluent solution<\/span>
\n AP5: OT Levels five days diluent solution<\/span>
\n K: Correction of (P-1) \/ P<\/span>
\n Q: dilution factor<\/span><\/p>\n

Difference in maximum allowable BOD levels between the two testers Duplo is 10% and average the results.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

tool: – Wardrobe BOD incubator with a temperature range of -10 to 50 0 C and was stabilized at 20 0 C at the test temperature – BOD Bottle 300 ml – Aerator – Measuring cup 100 ml – The glass cup 100 ml – Equipment for testing dissolved oxygen in accordance with the scale …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1820],"tags":[1767,1768,1875,1774,1872,1776,1874,1775,1772,1876,1873],"class_list":["post-1134","post","type-post","status-publish","format-standard","hentry","category-english","tag-biochemical-oxygen","tag-biochemical-oxygen-demand","tag-biochemical-oxygen-demand-bod-is-an-important-measure-of","tag-biochemical-oxygen-demand-apes","tag-biochemical-oxygen-demand-definition","tag-biochemical-oxygen-demand-epa","tag-biochemical-oxygen-demand-is-a-measure-of-the-quizlet","tag-biochemical-oxygen-demand-lab","tag-biochemical-oxygen-demand-lab-report","tag-biochemical-oxygen-demand-method","tag-biochemical-oxygen-demand-test"],"yoast_head":"\nDissolved and Biochemical Oxygen - 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