WO1994021349A1 - Flocculant composition for removing trihalomethane and its precursors - Google Patents

Flocculant composition for removing trihalomethane and its precursors Download PDF

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Publication number
WO1994021349A1
WO1994021349A1 PCT/KR1994/000018 KR9400018W WO9421349A1 WO 1994021349 A1 WO1994021349 A1 WO 1994021349A1 KR 9400018 W KR9400018 W KR 9400018W WO 9421349 A1 WO9421349 A1 WO 9421349A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
soluble
salt
composition
flocculant
Prior art date
Application number
PCT/KR1994/000018
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Chong Soo Hwang
Kanzo Kawahara
Original Assignee
Chong Soo Hwang
Kanzo Kawahara
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chong Soo Hwang, Kanzo Kawahara filed Critical Chong Soo Hwang
Publication of WO1994021349A1 publication Critical patent/WO1994021349A1/ja

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron

Definitions

  • Coagulant composition excluding trihalomethane and its forerunner substances
  • the present invention relates to the field of purifying various industrial wastewaters such as metals, fibers, and papermaking, foods, domestic wastewaters such as municipal sewage, etc., and tap water.
  • the former includes aluminum oxide (M 2 (S0-) 3 ), polyaluminum chloride (hereinafter referred to as PAS), and the latter includes compounds of various polymers.
  • the coagulant composition of the present invention (hereinafter, referred to as composition) belongs to the inorganic type.
  • An inorganic flocculant is required to have a high flocculating effect on suspended matter and a low residual amount of harmful metals and aluminum, iron, etc. in the treated water. Low residual amount is required even in water source water.
  • inorganic aluminum-based coagulants are used in the treatment of tap water, so that these substances such as THMs and Humic Acid must be removed. Have difficulty,
  • ozone or ozone is not used without chlorine sterilization, which causes THHs formation.
  • Some oxide sterilization method that by the CI0 2 or the like is ⁇ are used.
  • these disinfectants have problems that their safety has not been approved and their processing costs are expensive.
  • the present invention is added to industrial and industrial wastewater, domestic wastewater, etc., and acts as an effective flocculant for flocculation of suspended solids and removal of harmful metals, and at the same time, effectively removes THMs and their precursors. It is an object of the present invention to provide a flocculant composition to be used as a water purification agent for water supply and the like.
  • the present inventors have conducted long-term test research to achieve the technical background and problems as described above and the object thereof, and as a result, the water-soluble aluminum salt, the water-soluble iron salt, and the water-soluble magnesium salt were determined in atomic ratio.
  • Fe 0 ⁇ 01-2 to al 1, to 2 contains Hg 0.01 to 2
  • novel scavenger is the sum of HgO 1 to 15 wt%
  • a water-soluble salt of aluminum, iron, or magnesium is used as a raw material of the composition of the present invention.
  • These can also be used in the form of solids or solutions such as anhydrides, hydrates and double salts.
  • Mineral acid decomposed products of minerals containing Al, Fe and Hg can also be used.
  • vermiculite typically A 1 2 0 3] 0 ⁇ 182, Fe 2 0 3 10 ⁇ : .? 18;, containing MgO 5-202, other oxides and moisture, etc. 44-75 .
  • Mineral acid decomposition products of these minerals can be used.
  • composition of the present invention coagulant, Fe 0.01 to 2 with respect to Al 1 in the atomic weight ratio, contains Hg 0 ⁇ 0 ⁇ 2, its oxide A1 2 0 3, Fe 2 0 3, the sum of HgO is 1-15 %
  • composition of% by weight is appropriate, and the effect is small outside this range.
  • Formulations of these compositions are prepared by mixing various water-soluble Al, Fe, Mg or by adding decomposed products of Al, Fe, Mg-containing minerals and water-soluble Al, Fe, Mg salts.
  • composition of the present invention is used in the same manner as a general inorganic flocculant. Although it can be used as a solid mixture, it is better to use it as an aqueous solution.
  • composition solution to the wastewater and source water while stirring, adjust the pH to about 7, stir the mixture, and allow to separate and separate suspended matters and other substances.
  • Amount of composition used The use amount of the composition of the present invention varies depending on the degree of pollution of wastewater and source water, the degree of S, and the like, but the overall high purification effect is as follows.
  • the total amount of oxides is 5-10 weight%, and about 50-300 ⁇ is added to the wastewater and source water. It is effective to use.
  • the composition of the present invention has the ability to remove THMs and its precursors, and is not inferior to the ordinary S product in cohesion as described above, but rather, the mutual effect of coexistence of Al, Fe, and Mg is expected. .
  • Floe increases due to the presence of Fe salts, which indicates the need for aggregation, and the specific gravity is large, so that the precipitation rate of Floe is increased and the water purification effect is improved.
  • composition of the present invention is not inferior to ordinary products in the ability to remove harmful metals. Rather, it is expected that the effects of these metals will be improved due to the improvement of the contact force due to the interaction of Al, Fe and Hg. In addition, the residual amounts of Al and Fe in the service water after coagulant treatment are very small and negligible.
  • THMs are subject to regulation around the world, and their regulation values are less than 50 to 100 ppb.
  • Test conditions 1 1) .Sample sample-artificial Kaolin concentration 50 eg / 1
  • the present invention provides the composition of the present invention based on the surprising findings, and it is recognized that the removal of THMs is very effective. Economic effects
  • composition of the present invention has a good flocculating effect and at the same time has the ability to remove THMs and its precursors, and Fe, Mg-salts are relatively inexpensive in comparison with A] salts in terms of raw material price.
  • minerals containing Al, Fe, and Mg can be used and their economic effects are great.
  • Figure 1 is a graph showing the effect of removing THMs with the addition ratio of ME.
  • Test sample a) Artificial Kaolin portability 50 mg / 1 b) Hg, Cd, Cr, Pd concentration 1 rag / 1 c each) Huli ic Acid 5 mg / 1 2) Adjust PH 7.0
  • Chlorination solution Chlorine concentration 10 t / g
  • composition of the present invention is the same as a flocculant compared to ordinary products.
  • the added amount of various flocculants is 200 PP.
  • the composition of the present invention exhibits the same or better effect as a flocculant than conventional products even when the composition from mineral acid decomposed matter is mixed, and the effect of removing THMs is The same tendency was observed when using vermiculite hydrochloric acid or nitric acid extract.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
PCT/KR1994/000018 1993-03-16 1994-03-09 Flocculant composition for removing trihalomethane and its precursors WO1994021349A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019930003995A KR960008085B1 (ko) 1993-03-16 1993-03-16 트리할로메탄 및 그 전구물질을 제거하는 응집제조조성물
KR93-3995 1993-03-16

Publications (1)

Publication Number Publication Date
WO1994021349A1 true WO1994021349A1 (en) 1994-09-29

Family

ID=19352245

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1994/000018 WO1994021349A1 (en) 1993-03-16 1994-03-09 Flocculant composition for removing trihalomethane and its precursors

Country Status (5)

Country Link
JP (1) JP2788552B2 (ko)
KR (1) KR960008085B1 (ko)
CN (1) CN1070721C (ko)
RU (1) RU94046154A (ko)
WO (1) WO1994021349A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050345A2 (en) * 1999-02-25 2000-08-31 Minox Corporation Usa Mineral oxide liquid concentrates for water and wastewater treatment
WO2008027446A3 (en) * 2006-08-30 2008-04-24 Veolia Es Technical Solutions Process for recycling waster acid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184489A (en) * 1981-05-08 1982-11-13 Asahi Glass Co Ltd Purification of waste water containing turbid substance and phosphorus component
JPS62234511A (ja) * 1986-04-02 1987-10-14 Jitsuo Inagaki 析出凝集剤
JPS6344993A (ja) * 1986-08-12 1988-02-25 Asao Shimanishi 汚水中に溶解している有機物等の除去方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1009990B (zh) * 1988-04-09 1990-10-17 冶金工业部建筑研究总院 镁铁复合型废水处理剂及其生产方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184489A (en) * 1981-05-08 1982-11-13 Asahi Glass Co Ltd Purification of waste water containing turbid substance and phosphorus component
JPS62234511A (ja) * 1986-04-02 1987-10-14 Jitsuo Inagaki 析出凝集剤
JPS6344993A (ja) * 1986-08-12 1988-02-25 Asao Shimanishi 汚水中に溶解している有機物等の除去方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050345A2 (en) * 1999-02-25 2000-08-31 Minox Corporation Usa Mineral oxide liquid concentrates for water and wastewater treatment
WO2000050345A3 (en) * 1999-12-02 2001-02-01 Minox Corp Usa Mineral oxide liquid concentrates for water and wastewater treatment
US6527975B1 (en) 1999-12-02 2003-03-04 Minox Corporation Usa Mineral oxide liquid concentrates for water and wastewater treatment
WO2008027446A3 (en) * 2006-08-30 2008-04-24 Veolia Es Technical Solutions Process for recycling waster acid
US7473409B2 (en) 2006-08-30 2009-01-06 Veolia Es Technical Solutions L.L.C. Process for recycling waste acid

Also Published As

Publication number Publication date
CN1105797A (zh) 1995-07-26
KR960008085B1 (ko) 1996-06-19
JP2788552B2 (ja) 1998-08-20
RU94046154A (ru) 1996-12-20
KR940021432A (ko) 1994-10-17
CN1070721C (zh) 2001-09-12

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