SUPPRESSING METHOD FOR FORMATION OF CHLORINE TYPE HARMFUL MATERIAL IN TAP WATER

• Main Author: TAKEDA SHIZUO
• Format: Patent
• Language: English
• Published: 17.11.1982
• Subjects: CHEMISTRY; CONTROLLING; METALLURGY; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To suppress the formation of chlorine type harmful materials in tap water by disposing electrodes for measuring oxidation reduction potential and chlorine injection points through chlorine injection controlling valves at both points of the final end of a settling stage and right after a filtration treatment. CONSTITUTION:In the stage of performing middle chlorination, the 1st oxidation reduction electrode 11, the electrode of a pH meter and a thermometer 13 are inserted to near the supernatant absorbing water part 10 near the terminal of a settling basin 4 and the measured value is transmitted to an arithmetic controlling mechanism 14. Likewise, the 2nd electrode 15 for oxidation reduction potential is inserted to the outlet of a filtering basin 6 and is connected similarly to the mechanism 14. The chlorine to be injected is injected into a treating water tank 5 at a middle chlorine injection point 17 from a chlorine injector 16 for the purpose of the middle chlorination. As post chlorination, a post chlorine injection point 18 is provided to a water feed pipe 7 behind the oxidation reduction electrode 15 after the filtration. According to need, a fore chlorine injection point 19 is provided near a trough 1.