Patent ID: 9365884
Filing Date: 2016-06-14
CPC Classification: C12Q,G01N

Claim Text:
1. An environmental evaluation method, comprising: supplying a plurality of microorganisms into an evaluation chamber isolated by isolation walls from an outer space such that the microorganisms are suspended in air within the evaluation chamber; supplying removal particles into the evaluation chamber for removing the microorganism from the evaluation chamber, wherein a charged particle, a radical or a particle having a sterilizing ability is used as the removal particles; collecting a sample of the microorganisms from the evaluation chamber; measuring the collected sample of the microorganism; and evaluating an ability of the removal particles to remove the microorganism from the evaluation chamber, based on the measurement of the collected sample, wherein for preventing the microorganisms from adhering to the isolation walls, each isolation wall has an outer wall and an inner wall, and via an air flow passage formed between the inner wall and the outer wall, an air current flows, through a plurality of air supply holes formed on all wall surfaces excluding the floor surface of the inner wall or all wall surfaces including the floor surface of the inner wall, into the center of the evaluation chamber while maintaining the inside of the evaluation chamber in the negative pressure state, a plurality of samples are collected and measured periodically during supply of the removal particles into the evaluation chamber, and the ability of the removal particles to remove the microorganism from the evaluation chamber over time is evaluated based on the plurality of measurements, and substantially only spore-forming bacteria in a sporulated state are used as the microorganism in order to prevent the spontaneous decrease of the microorganism from suspension within the evaluation chamber.