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1. (WO2015114805) METHOD AND DEVICE FOR TREATING HEAVY-METAL-CONTAINING WASTEWATER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2015/114805 International Application No.: PCT/JP2014/052289
Publication Date: 06.08.2015 International Filing Date: 31.01.2014
IPC:
C02F 1/62 (2006.01) ,C02F 1/52 (2006.01) ,C02F 1/64 (2006.01) ,G01N 21/78 (2006.01) ,G01N 31/00 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
58
by removing specified dissolved compounds
62
Heavy metal compounds
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
52
by flocculation or precipitation of suspended impurities
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
58
by removing specified dissolved compounds
62
Heavy metal compounds
64
of iron or manganese
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
75
Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77
by observing the effect on a chemical indicator
78
producing a change of colour
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
31
Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods
Applicants: KURITA WATER INDUSTRIES LTD.[JP/JP]; 10-1, Nakano 4-chome, Nakano-ku, Tokyo 1640001, JP
Inventors: KAWARABAYASHI, Naoya; JP
WATANABE, Minoru; JP
Agent: SHIGENO, Tsuyoshi; Nissin bldg., 9F, 5-10, Shinjuku 2-chome, Shinjuku-ku, Tokyo 1600022, JP
Priority Data:
Title (EN) METHOD AND DEVICE FOR TREATING HEAVY-METAL-CONTAINING WASTEWATER
(FR) PROCÉDÉ ET DISPOSITIF DE TRAITEMENT DES EAUX USÉES CONTENANT DES MÉTAUX LOURDS
(JA) 重金属含有排水の処理方法及び装置
Abstract:
(EN) The purpose of the present invention is to enable a dithiocarbamic-acid-based heavy-metal scavenger to be introduced into a heavy-metal-containing wastewater in a proper amount, which is neither too large nor too less, when the wastewater is treated with the scavenger. In the method and device for treating a heavy-metal-containing wastewater, an inorganic coagulant is added to the heavy-metal-containing wastewater to cause coagulation, a dithiocarbamic-acid-based heavy-metal scavenger is then added thereto, and thereafter solid-liquid separation is conducted. A heavy-metal compound is added to the heavy-metal-containing wastewater to which the dithiocarbamic-acid-based heavy-metal scavenger has been added, and the heavy-metal compound is reacted with the dithiocarbamic-acid-based heavy-metal scavenger contained in the water to develop a color. Thereafter, the absorbance or transmittance at a wavelength of 400-700 nm is measured. Based on the results of the measurement, the amount of the dithiocarbamic-acid-based heavy-metal scavenger to be added is controlled.
(FR) La présente invention a pour but de permettre à un piège de métaux lourds à base d'acide dithiocarbamique d'être introduit dans des eaux usées contenant des métaux lourds en une quantité appropriée, qui n'est ni trop élevée ni trop faible, lorsque les eaux usées sont traitées avec le piège. Dans le procédé et le dispositif pour traiter des eaux usées contenant des métaux lourds, un coagulant inorganique est ajouté aux eaux usées contenant des métaux lourds pour entraîner une coagulation, un piège de métaux lourds à base d'acide dithiocarbamique est ensuite ajouté à ces dernières, puis une séparation solide/liquide est menée. Un composé de métal lourd est ajouté aux eaux usées contenant des métaux lourds, auxquelles a été ajouté le piège de métaux lourds à base d'acide dithiocarbamique, et le composé de métal lourd réagit avec le piège de métaux lourds à base d'acide dithiocarbamique contenu dans l'eau pour développer une couleur. Ensuite, l'absorbance ou le facteur de transmission à une longueur d'onde de 400 à 700 nm est mesurée. En fonction des résultats de la mesure, la quantité de piège de métaux lourds à base d'acide dithiocarbamique à ajouter est régulée.
(JA)  重金属含有排水をジチオカルバミン酸系重金属捕集剤によって処理するにあたり、重金属捕集剤の薬注量を過不足のない適正量とする。重金属含有排水に無機凝集剤を添加して凝集処理した後、ジチオカルバミン酸系重金属捕集剤を添加し、その後、固液分離する重金属含有排水の処理方法及び装置。該ジチオカルバミン酸系重金属捕集剤が添加された重金属含有排水に重金属化合物を加え、重金属化合物と該水中のジチオカルバミン酸系重金属捕集剤とを反応させて発色させた後に400~700nmの波長の吸光度又は透過率を測定し、その測定結果に基づいて、前記ジチオカルバミン酸系重金属捕集剤の添加量を制御する。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)