Processed sewage effluent
阅读：648发布：2021-07-05
专利汇可以提供Processed sewage effluent专利检索，专利查询，专利分析的服务。并且A continuous method and means for the measurement of biological oxygen demand in an effluent in which a sample flow of the effluent is continuously fed through a nuclear resonator operated for the detection of carbon 13, or hydrogen in conjunction with carbon 13. The detected quantity is then converted to a known companion level of carbon 12, and from this the amount of biological oxygen demand is indicated.，下面是Processed sewage effluent专利的具体信息内容。
1. A system for the measurement of biological oxygen demand of an effluent comprising: sample means adapted to be coupled to an effluent line for providing a sample of the effluent; nuclear resonating means adapted to receive said sample and subjecting it to a magnetic field and for detecting the disturbance of that field by the sample and providing as an output an indication of the disturbance of that field; correlation means responsive to the output of said nuclear resonating means for comparing said output to a signal representative of the disturbance of said field by a sample containing a known substance representative of a known biological oxygen demand; and conversion means responsive to the output of said correlation means for indicating the level of biological oxygen demand in said sample.
2. A system as set forth in claim 1 wherein said sampling means includes means for providing a said sample to said nuclear resonator on a substantially continuous basis and said nuclear resonating means includes means for subjecting said sample to said magnetic field on a substantially continuous basis.
3. A system as set forth in claim 2 wherein said substance is hydrogen in conjunction with carbon 13.
4. A system as set forth in claim 2 wherein said substance is carbon 13 and said system further comprises fluid concentrating means responsive to the output of said sampling means for concentrating said sample of effluent before said sample is supplied to said nuclear resonating means.
5. A system as set forth in claim 4 wherein said concentrating means comprises means for concentrating said effluent by a factor of 50 to 100.
6. A system as set forth in claim 5 wherein said conversion means includes means for converting the level of oxygen 13 to carbon 12 and converting it to biological oxygen demand.
7. A system as set forth in claim 6 wherein said conversion means comprises means for converting carbon 12 to biological oxygen demand in terms of milliliters per liter.
8. A system as set forth in claim 1 further comprising: a source of additives adapted to be added to said effluent to adjust the level of biological oxygen demand in said effluent; process control means responsive to a control signal for supplying said additives to said effluent; and error signal means responsive to a reference signal and an output of said conversion means for providing a said control signal to said process control means representative of the excess in biological oxygen demand present, whereby a selected biological oxygen demand of effluent is not exceeded.
9. A method of measurement of biological oxygen demand of an effluent comprising the steps: a. applying the effluent to a nuclear generator and subjecting it to a magnetic field and detecting as an electrical quantity an output which is an indication of the disturbance of that field by the sample in the form of output level versus frequency; b. correlating the output of step (a) with a reference electrical characteristic representative of the disturbance of a said field by a sample containing a known substance representative of a known biological oxygen demand and providing and obtaining an output representative of the quantity of said substance in said sample; and c. converting the output of said correlation means to an indication of the level of biological oxygen demand of said sample.
10. A method as set forth in claim 9 wherein said substance is carbon 13 and the quantity of carbon 13 is converted to a companion quantity of carbon 12 and the quantity of carbon 12 is converted to biological oxygen demand.
11. A method as set forth in claim 9 wherein said substance is hydrogen in conjunction with carbon 13.
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