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<br />Woter Treotlllent Plant Production <br /> <br />---- <br />~;""">~ <br /> <br />Color removal by preozonation alone was significantly lower at the Sabine <br />plant (6.3% to 12.7%). <br />. Preozonation alone did not improve TOC removal. The TOC levels in the <br />non-ozonated and ozonated settled water were approximately the same. <br />However, it is anticipated that the TOC removal at the full-scale ozone plants <br />will improve because of additional TOC removal in the biological filters. <br />Ozone conditions water so that biological growth can occur in the filters. <br />. Preozonation controlled chlorination by-product (TIHMs and HAAs) <br />formation. It is very likely that the City's finished water TIHM and HAAs <br />levels would be below 0.04 and 0.03 mg/L. respectively if preozonation <br />facilities are installed at both plants. <br />. The threshold odor numbers (TON) were not reduced significantly at both <br />plants due to preozonation. However. the odor of water changed due to <br />preozonation (from grassy/slightly musty to disagreeable at the Sabine WTP; <br />from musty/fishy to disagreeable. at the Cherokee WTP). <br />. At each plant. no significant levels of bromate were formed <br /> <br /> <br />~ <br />3.75 <br />4.96 <br />2.66 <br />-- <br />4.14 <br /> <br />1.95 <br />1.95 <br />2.08 <br />2.08 <br /> <br />;o.~ <br /> <br />.015 <br />0.32 <br />0.157 <br />0.306 <br />0.086 <br />0.09 <br />0.121 <br />0.100 <br /> <br />4.0 <br />6.45 <br />5.9 <br />7.4 <br />4.4 <br />4.6 <br />5.8 <br />4.8 <br /> <br />1 <br />2 <br />3 <br />4 <br />1 <br />2 <br />3 <br />4 <br /> <br /> TABLE 3-2: <br /> STEP 1JSTEP 2 COAGULANT DOSES <br /> COAGULANT DOSB <br /> m" <br />PLA/\'T COAGULANT TYPI! ARST SECOND nnRD FOURllI <br /> QUARTER QUARTER QUARTER QUARTER <br /> AWM 30 ,':j.}J,~~3(),)>MY~~ 60 30 <br />SABINE PLANT HYPER ION <IOlJO 30 9,~~fi'3O'.~~:~' 50 ''1/,.37,1'''''''' <br /> HYPER ION 7S02A 30 )i~t'\:i30).~.~~'~ 60 ,:\"~,~:n.7.: -.;~}- <br /> ALUM 40 30 ",,\;'.47:5+":, 40 <br />CHEROKEE PLANT HYPER ION <IOlJO 35 35 30 30 <br /> HYPER ION 7502A 35 30 35 2S <br />-Only araIi= Step I doia <br />. Yellow IRa: NcitherSIep 1101' Saep 2TOC mnovaIc:ouIdbe.ICIIiemt,wichdaisdose, <br /> <br />Sabine Plant <br /> <br />Cherokee <br />Plant <br /> <br /> <br /> <br />InnovCltive Approoches,.. P/CIcticoi eesu/ts <br />