Abstract: A computer of a microbial community analysis system includes an input unit configured to input a plurality of data groups including information indicating a nucleotide sequence of a gene of each of a plurality of microorganisms included in activated sludge in which a water treatment is performed; a similarity calculating unit configured to calculate a similarity between data groups on the basis of the nucleotide sequences included in the input data groups, and a coordinates calculating unit configured to calculate coordinates in a multidimensional space of each of the data groups on the basis of the calculated similarity.

Abstract: A computer of a prediction-rule generating system includes an input unit configured to input time series data of an abundance proportion of microorganisms or nucleotide sequences included in activated sludge in which a water treatment is performed and water quality information indicating water quality after a water treatment associated with data at each time constituting the time series data, a principal component analyzing unit configured to perform principal component analysis on the input time series data and calculate principal component scores of data at each time constituting time series data, and a prediction rule generating unit configured to generate a prediction rule for predicting water quality after a water treatment from an abundance proportion of microorganisms or nucleotide sequences on the basis of the calculated principal component scores and the input water quality information indicating water quality after a water treatment.

Abstract: A method for producing a microbiologic agent is described. The method includes a step of adding biomass containing a target compound-degrading microorganism and an inorganic microparticle carrier to a medium containing a target compound. The microorganisms included in the biomass are carried on the inorganic microparticles, and the medium is cultured while monitoring an abundance ratio of the target compound-degrading microorganism in microorganisms carried on the inorganic microparticle carrier. After the abundance ratio of the target compound-degrading microorganism reaches a predetermined value, the inorganic microparticle carrier carrying the target compound-degrading microorganism is collected to obtain the microbiologic agent.

Abstract: A computer of a prediction-rule generating system includes an input unit configured to input time series data of an abundance proportion of microorganisms or nucleotide sequences included in activated sludge in which a water treatment is performed and water quality information indicating water quality after a water treatment associated with data at each time constituting the time series data, a principal component analyzing unit configured to perform principal component analysis on the input time series data and calculate principal component scores of data at each time constituting time series data, and a prediction rule generating unit configured to generate a prediction rule for predicting water quality after a water treatment from an abundance proportion of microorganisms or nucleotide sequences on the basis of the calculated principal component scores and the input water quality information indicating water quality after a water treatment.

Abstract: Microbial flora included in activated sludge in which a water treatment is performed is analyzed accurately. A computer of a microbial community analysis system includes an input unit configured to input a plurality of data groups including information indicating a nucleotide sequence of a gene of each of a plurality of microorganisms included in activated sludge in which a water treatment is performed; a similarity calculating unit configured to calculate a similarity between data groups on the basis of the nucleotide sequences included in the input data groups, and a coordinates calculating unit configured to calculate coordinates in a multidimensional space of each of the data groups on the basis of the calculated similarity.

Abstract: A method for producing a microbiologic agent is described. The method includes a step of adding biomass containing a target compound-degrading microorganism and an inorganic microparticle carrier to a medium containing a target compound. The microorganisms included in the biomass are carried on the inorganic microparticles, and the medium is cultured while monitoring an abundance ratio of the target compound-degrading microorganism in microorganisms carried on the inorganic microparticle carrier. After the abundance ratio of the target compound-degrading microorganism reaches a predetermined value, the inorganic microparticle carrier carrying the target compound-degrading microorganism is collected to obtain the microbiologic agent.