AERATION: Principles and Practice ( VOLUME 11 ) - Chapter 6 pdf

... LLC FIGURE 6. 21 Effect of depth on aeration tank diameter for I-SO ™ design example using three aeration tanks each with a 29.8 kW (4 0 hp) motor, 0 .61 m (2 4 in) impeller and a 3 .66 m (1 2 ft) off ... efficiencies in aeration tanks (Okun and Lynn, 195 6) . In 1953, Budd and Lambeth (1 95 7), under the auspices of Dorr-Oliver, conducted studies on a 55– 160 m 3 /...

Ngày tải lên: 11/08/2014, 09:21

... River Manhattan, NY 7.5 (1 7 0) Diffused, fine pore 968 (1 98 6) 5.57 7.12 (1 99 8) 7.43 (1 99 9) 15.7 16. 8 (Conklin, 2001; Leonforte, 199 8) Red Hook Brooklyn, NY 2 .6 (6 0) Diffused 232 (1 98 8) 16. 8 2.49 (1 99 8) 2.29 (1 99 9) 25 24 (Conklin, 2001; Leonforte, ... (Hildreth, 1999; Hildreth, et al. 199 7) MCUA Sayreville, NJ 6. 5...

Ngày tải lên: 11/08/2014, 09:21

... Temperature Temperature, °C , mg/L 0 14 .62 20.3 10 11. 29 25.1 20 9.09 29.8 30 7. 56 34.0 40 6. 41 37 .6 FIGURE 2.10 Effect of temperature on oxygen saturation. C s * H mg L mg L air water ,* () () () * . * () = − () () ° () H p ... Gm h wlbh G h G scfm ossN oss () =× = () () =× × = () 0 2315 1 293 0 30 0 23 0 075 60 1 04 3 . min . S...

Ngày tải lên: 11/08/2014, 09:21

... disc 18-cm grid 0 .6 5.5 3 .6 5.2 22-cm grid 0 .6 5.0 4.1 6. 1 24-cm grid 1.1–4.7 4.4–5.5 Ceramic dome 18-cm grid 0.8–3.9 3.4 6. 0 Perforated membrane disc b 51-cm 24–172 2.7–4 .6 30-cm 13–237 2.7 6. 1 23-cm ... Aspirators and Jets Type and Placement Airflow Rate (m 3 N /h/unit) Submergence (m) SOTE (% ) SAE (kg/kWh) Reference Jets Dir 21.1 119 4 .6 15–24 1.7–2.0 Yunt & Hancuf...

Ngày tải lên: 11/08/2014, 09:21

... h s21 1 () = () + () ⋅∆ SOTE h SOTE h SOTE h h s () = () − () 21 ∆ SOTE h d SOTE h dh SOTE SOTE h zH h Hh SOTE SOTE h h s so S S so () = () [] =⋅− () [] ⋅ +⋅ − () [] +⋅− () [] =⋅− () [] ⋅ () () 1 1 0 ... h zH h Hh SOTE SOTE h h sso S S so () =⋅− () [] ⋅ +⋅ − () [] +⋅− () [] =⋅− () [] ⋅ () ()...

Ngày tải lên: 11/08/2014, 09:21

... turbine/50hp 1unit 45 (6 0) 22 (3 0) 16 (8 0) 7 (4 0) 69 (8 . 6) 33 (4 . 3) — — 0.95 (1 .5 7) 1.13 (1 .8 6) Field/ total barrier ditch/d = 4.0 m Boyle et al., 1989 AS Float/20hp 14 (1 9) 47.8 (2 4 2) — 2900 65 (2 6) 0.40 (0 .6 6) ... diffuser 40hp/1unit 45 (6 0) * 23 (1 1 6) 210 (2 6. 1) — — 1.55 (2 ....

Ngày tải lên: 11/08/2014, 09:21

... C i i n RRi i n L f iR f R f L ff R == = − − () − () =− ()                  == ∞ ∞ ∑∑ 11 11 0 , * * Steady-state overall tank values dC dt CC t Ka C C LRL L f RL = − +− () 0 KKa t L f =+ 1 0 dD D Kdt D D Kt DDe D Dt Kt 0 0 0 0 ∫∫ =− =− =      − ln ... last 30 years (EPA, 1983; Kayser, 1 969 ; Mueller and Boyle, 198 8). In 19 96, the ASCE publi...

Ngày tải lên: 11/08/2014, 09:21

... between initial investment and long-term operation and maintenance (O and M) expenditures. Many long-term O and M expenditures are determined by the capabilities and con- straints initially designed ... be found in the manual of practice, FD-13 (1 98 8). The in situ process interruptive methods include hosing with either high-pressure (& gt;415 kPa [60 psia ]) or...

Ngày tải lên: 11/08/2014, 09:21

... Supp. 330 (1 97 8); and remanded 599 F.2d 1247 (3 rd Cir. 197 9), on remand 491 F. Supp. 290 (1 98 0); aff’d 65 7 F.2d 1322 (1 98 1) and later proceeding on attorney fees 530 F. Supp. 1018 (1 98 1), rev’d ... grounds 68 9 F.2d 1 16 1 (3 rd Cir. 198 2); reh. den. 69 3 F.2d 22 (3 rd Cir. 198 2); cert. den. 460 U.S. 1052 (1 98 3), 103 S. Ct. 149...

Ngày tải lên: 18/06/2014, 19:20

... HgOHCl Hg(OH) 2 HgS 3.3 1.2 0.05 26 Hg(cysteine) 2 Hg(thiourea) 2 3.7 4 .6 MMHg CH 3 HgCl CH 3 HgOH CH 3 HgSH 1.7 0.07 28 CH 3 Hg(cysteine) CH 3 Hg(thiourea) 50 63 0 Cd ... Fish and Wildlife Advisories, CD-ROM, U.S. EPA-823-C-9 7- 005, 19 96. 15. U.S. EPA, National Forum on Mercury in Fish, U.S. EPA 823-R-9 5-0 02, U.S. EPA Office of Water, Washingt...

Ngày tải lên: 08/08/2014, 10:22