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Look to Hach for every step of the way in your BOD testing. Our samplers, standards, lab supplies, and no-membrane instruments, combined with our expertise, give you superior results. BOD know-how from the best. Water quality data relies on sample integrity. Correct sampling procedures deliver accurate lab results, a critical component when determining whether you have violated a permit or not.
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Generally, the biological oxygen demand serves as a sum parameter for the assessment of pollution of sewage. Unlike the special factor BOD 5 , which according to the standardized lab method the measurement of the biochemical oxygen demand excluding the nitrification part follows after 5 days , the total BOD includes this bacterial oxidation of ammonia to nitrate which allows a continuous online monitoring. The nitrification is an important part of the sewage treatment processes and should be taken into consideration for optimal control of waste water treatment plants. Similar to the working principle of a biological treatment plant, in this WWTP simulation, the sewage is mixed with activated sludge under aeration and continuously led through the drain cascade. On leaving the reactor cascade the remaining oxygen will be determined with the O 2 sensor, whereby the volumes of waste water, activated sludge and air are specifically defined and monitored.
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These example sentences are selected automatically from various online news sources to reflect current usage of the word 'biochemical. Send us feedback. See more words from the same year. More Definitions for biochemical.
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