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Standard Test Method for Total Active Biomass in Cooling Tower Waters (Kool Kount Assay; KKA)
Automaticky přeložený název:
Standardní zkušební metoda pro Total aktivní biomasy v chladicí věže Waters (Kool Kount obsah; KKA)
NORMA vydána dne 1.6.2013
Označení normy: ASTM D6530-00(2013)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2013
Kód zboží: NS-35524
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
colorimetric bioassay, cooling tower water, triphenyl tetrazolium chloride, viable active biomass, ICS Number Code 27.200 (Refrigerating technology)
Significance and Use | ||||||||
5.1 This test method is useful for rapid determination of viable active biomass concentrations in cooling tower waters. The efficiency of cooling towers is directly affected by the concentration of biomass in the cooling tower waters. As biomass concentrations increase, biofilm formation occurs resulting in a decrease in the efficiency of heat exchange in the tower. Current tests for monitoring the biomass concentration in cooling towers require at least 36 h for growth of the microorganisms on a solid agar surface for counting. Replication of microorganisms over the 36-h period before results are available creates an aqueous environment which is no longer represented by the data generated. Timely test results can assist in minimizing biocide addition to control biomass concentrations. Kool Kount provides data within hours to allow for more precise control of active biomass concentrations in the waters. |
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1. Scope | ||||||||
1.1 This test method covers the determination of viable active biomass in cooling tower water in the range from 102 to 108 cfu/mL (1). It is a semiquantitative test method. 1.2 This test method was used successfully with reagent water, physiologic saline, and cooling tower waters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 1.3 This standard does not
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Guide for Equipment for Sampling
Water and Steam in Closed Conduits (Withdrawn 2003) Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Specification for Reagent
Water Standard Practices for Sampling Water
from Flowing Process Streams |
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