Water Treatment Systems
We produce water that is highly valued by users. In addition, we purify wastewater to the level at which it can be reused as clean water.
Kurita provides optimum water treatment systems to produce the specific water quality required for a broad spectrum of different uses.
Water Purification Systems
These systems produce water that is nearly theoretically pure water by removing impurities to the maximum. By fully employing various water treatment technologies—including ion exchange, reverse osmosis membranes, electric desalination, and ultrafiltration—we provide systems that are optimally matched to our customers’ needs.
Ultrapure water production systems are largely divided into pretreatment systems, primary pure water production systems (“primary pure water systems”), and polishing systems (subsystems).
Pretreatment systems mainly remove particles from industrial water and well water. Primary pure water systems remove most of the ions, TOCs (total organic carbons dissolved in the water), dissolved gases (oxygen, CO2), and SiO2. Subsystems remove a small quantity of the ions and TOCs that could not be fully removed by the primary pure water system, and also remove the ions and TOCs eluted from system constituting members in and after the process with the primary pure water system.
Kurita combines the latest technologies and devices and offers systems that are optimal for the specific quality of raw water and ultrapure water quality requirements.
Wastewater Treatment Systems
The characteristics of wastewater discharged from factories vary from industry to industry. Kurita therefore provides systems that employ a broad range of technologies to reliably treat industrial wastewater in various forms and conditions.
These systems include biological treatment systems for decomposing organic substances in wastewater with the use of microorganisms, and pressurized floatation systems for removing suspended substances and other substances by using the difference between water and these substances in specific gravity. In addition to these systems, Kurita offers optimal wastewater treatment devices such as sedimentation treatment systems and belt-presses, screw-presses, polydiscs, and many other types of dehydrators by employing its abundant know-how on water treatment and adapting these devices to the wastewater properties, water volume, required level of water treatment quality, and other specific characteristics.
Water Reclamation Systems
We propose the reclamation and recycling of wastewater with waste reduction also taken into consideration, thus contributing to more effective use of water resources, environmental impact reduction, and cost reduction.
For example, Kurita provides semiconductor plants with a system for collecting some of the ultrapure water used in the different production processes and reusing it to make ultrapure water. Wastewater may be collected separately for each production process, or as general wastewater mixing organic wastewater with inorganic wastewater after partial treatment. Kurita designs an optimal meeting point for the primary system by controlling the quality of water for collection and the quality of water that has been collected and treated.