Chemistry: analytical and immunological testing – Oxygen demand
Patent
1997-09-08
1999-03-16
Redding, David A.
Chemistry: analytical and immunological testing
Oxygen demand
436138, 4352861, 4352865, 4352871, G01N 3318
Patent
active
058829326
ABSTRACT:
A continuous, quick measurement method of BOD, and an apparatus therefor is disclosed. The apparatus comprises a sample tank in which a sample is prepared suitably for the measurement, a reactor in which microorganisms maintain their activity, a medium reservoir which contains nutrients for the growth of the microorganisms, pumps for transferring liquids, and a microprocessor which controls the operation of all means including a magnetic stirrer for mixing the liquid in the reactor and diagnoses of the apparatus itself. Using the apparatus, the method comprises a continuous culture stage, an endogenous respiration stage, a endogenous respiration rate-measuring stage, a sample feeding stage and a BODq measuring stage. The apparatus can detect BOD in one hour and is very low in error rate. Further, because microorganisms can be continuously cultured, the apparatus is semi-permanent, easy to manage, low in cost and suitable to be operated at a treatment site.
REFERENCES:
patent: 4898829 (1990-02-01), Siepmann et al.
patent: 5281537 (1994-01-01), Robertson et al.
patent: 5356792 (1994-10-01), Maeda et al.
patent: 5702951 (1997-12-01), Bridger
Chung Ki Nom
Hwang Yeal Soon
Kang Sung Yoon
Kim Hyung Charn
Kim Jin Cheol
Redding David A.
Yukong Limited
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