1 1 1 Mechanism COAGULATION coagulation all the

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처리기술 1)응집기술 1 -1)응집 Mechanism COAGULATION • 응집 (coagulation): all the reactions and mechanisms

처리기술 1)응집기술 1 -1)응집 Mechanism COAGULATION • 응집 (coagulation): all the reactions and mechanisms that result in particle aggregation in water • 플럭형성공정 (flocculation): aggregation of destabilized particles and the precipitation products (physical process of producing particle contacts). Coagulation steps Coagulant formation → Particle destabilization → Physical interparticle contacts

Destabilization Mechanism

Destabilization Mechanism

Hydrolyzing Metal Salt Coagulants Alum coagulation diagram (Amirtharajah and Mills, 1982).

Hydrolyzing Metal Salt Coagulants Alum coagulation diagram (Amirtharajah and Mills, 1982).

Polyelectrolyte Coagulants

Polyelectrolyte Coagulants

1 -2)인제거 Mechanism Chemical Phosphorus Removal Ø Chemical precipitation for phosphorus removal 1) Precipitation

1 -2)인제거 Mechanism Chemical Phosphorus Removal Ø Chemical precipitation for phosphorus removal 1) Precipitation with calcium 2+ + 2 Ca + 2 HCO 3 + 2 Na. OH → Ca. CO 3(S) + 2 Na + CO 3 + 2 H 2 O 2+ 310 Ca + 6 PO 4 → Ca 10(PO 4)6(OH)2 2) Precipitation with aluminum and iron 3+ 3 -n + • With aluminum : Al + Hn. PO 4 ⇔ Al. PO 4 + n. H 3+ 3 -n + • With iron : Fe + Hn. PO 4 ⇔ Fe. PO 4(s) + n. H

Chemical Phosphorus Removal

Chemical Phosphorus Removal

Chemical Phosphorus Removal Ø Strategies for phosphorus removal

Chemical Phosphorus Removal Ø Strategies for phosphorus removal

2 -1)탈취 Mechanism Emissions from Stack Odour control -foundries Sampling Site Anotec Treatment Samples

2 -1)탈취 Mechanism Emissions from Stack Odour control -foundries Sampling Site Anotec Treatment Samples sent to Laboratories

Malodour is rendered nonvolatile and is significantly reduced / eliminated Odour control -foundries Anotec

Malodour is rendered nonvolatile and is significantly reduced / eliminated Odour control -foundries Anotec array comes into direct contact with malodour The Anotec formulation is applied via a nozzle Malodour enters the stack

Compounds (ppb) Stack - Anotec (Fans Off) Stack - Anotec (Fans On) 1, 829.

Compounds (ppb) Stack - Anotec (Fans Off) Stack - Anotec (Fans On) 1, 829. 8 1204. 9 106. 2 94. 14 141. 4 51. 3 24. 4 82. 74 1. 4 0. 2 85. 71 butanol 184. 5 8. 4 2. 6 98. 59 acetone 1, 165. 2 84. 4 16. 9 98. 55 2 -butanone 6. 1 5. 1 0. 8 86. 89 3 -buten-2 -one 2. 6 3. 0 2. 1 19. 23 236. 5 27. 7 7. 8 96. 70 2, 598. 8 269. 4 75. 6 97. 10 159. 4 14. 0 3. 2 98. 00 33. 7 0. 3 99. 11 1, 553. 8 209. 6 31. 3 97. 99 149. 9 76. 3 17. 1 88. 59 2, 770. 8 295. 8 85. 3 96. 92 89. 9 13. 8 4. 1 95. 44 4. 0 3. 2 1. 9 53. 00 ethanol i-propanol Odour control -foundries Raw Odour (Cooling) Removal Efficiency % ethylacetate methylacetate benzene methylhexanes toluene ethylbenzene m, p-xylenes o-xylenes hexane