Metawater Co., Ltd.

Other

Ace Water Co., Ltd.

Dabide Yamaguchi

Kyungju Kim

Yoshiharu Tanaka

Tokio Ohto

Takashi Nakayama

Junichi Shiga

Takuro Endo

Shigeyuki Okada

Yuka Yamaguchi

Toshiyuki Kitada

Hiroshi Munehira

Takahito Sugimoto

Yusuke Hisamoto

Providing a method of estimating the number of microparticles such as microorganisms in a sample, without performing complicated operations. The method comprises counting by constant flow the number of target microorganisms contained in the sample at a predetermined flow rate, sectioning measurement data obtained as a result of the constant flow counting into a predetermined number of sections by a predetermined unit time for a section, counting the number of sections in which microorganisms are detected and the number of sections in which they are not detected, in the predetermined number of sections; and estimating the number of microorganisms in the sample, by a statistical method from the flow rate of the sample in the constant flow counting step, the predetermined number of sections and the predetermined unit time in the sectioning step, and the number of sections in which microorganisms are detected in the counting step.

Method for estimating number of microparticles in sample

An inclined sedimentation acceleration apparatus includes an inclined part having a plurality of inclined flow paths through which raw water flows, and side plates disposed on both sides of the inclined part. An upper ridge part of the inclined part is disposed at a height different from that of an upper ridge part of the side plate. Suspended solids are less likely to accumulate on an upper surface of the inclined sedimentation acceleration apparatus.

Inclined sedimentation acceleration apparatus

Provided is a water treatment system that prevents overlook and misdetection of abnormal flocculation. The water treatment system includes a mix tank, a flocculation tank, a plurality of floc-particle-diameter measurement devices, a fault detection device that detects abnormal flocculation, and a notification device that notifies occurrence of the abnormal flocculation. The fault detection device includes: a calculator that calculates at least one of a difference and a ratio between particle diameters of floc; a storage that stores therein a tolerable range of at least one of the difference and the ratio between the particle diameters of floc; a determiner that, when the calculated value is within the tolerable range, determines that it is normal, and when the calculated value is outside the tolerable range, determines that it is abnormal; and an outputter that transmits an abnormal flocculation detection signal to the notification device.

Water treatment system

Filter housing case for use in a microbial water sampler

Filter housing for use in a microbial water sampler

Provided are a method and an apparatus that enable rapid and automatic determination of the coagulant injection rate in a process of water treatment through coagulation and sedimentation. Using a coagulation analyzer comprising sample tanksA toD each for keeping a predetermined amount of raw water, a water supply pump, water supply/discharge valvesfor raw water and washing water, mixersA toD, a coagulant injection unit, and a detectorfor determining the particle size and the particle number of flocs, the time within which the coagulantinjected into the sample tanks is dispersed by mixing and the particles begin to agglomerate (agglomeration start time) is determined, and based on the thus-determined agglomeration start time, the coagulant injection rate is determined, or the amount of the coagulant to be injected is controlled.

Apparatus for determining coagulant amount

Method and apparatus for determination of coagulant injection rate in water treatment process

Growing community of inventors

Tokyo, Japan

Dabide Yamaguchi