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100 0 _ <br /> I <br /> o. o <br /> 80 �1 <br /> 4� `—BOD Removal(%)•11-0.52ea0aT1100 <br /> /p r-0.92 <br /> 0 80 <br /> 0 <br /> y � � <br /> ❑ 40 <br /> 0 <br /> m <br /> (o) Section A <br /> 20 (•) Section B <br /> (o) Section C <br /> (•)UCAL Davis(Smith etaL 1980) <br /> 0 20 40 60 80 <br /> T, Average Detention Time (min) <br /> Figure 6. BOD removal efficiency vs detention time. <br /> i <br /> 80 <br /> 1.1 Total <br /> lo) Volatile <br /> "a <br /> { <br /> E <br /> m d <br /> a <br /> 0 40 <br /> N <br /> a <br /> m <br /> a <br /> c <br /> m <br /> r I <br /> N <br /> 0 <br /> 80 F1 <br /> J <br /> E 40 t <br /> p <br /> m <br /> 0 10 20 30 <br /> Downslope Distance(m) <br /> Figure 7. Concentration of BOD and suspended solids vs <br /> downslope distance on section C(25 June 1980). <br /> tions were observed during a visit at the Easley, part of the terraces so that the rest of the system <br /> South Carolina,site. After years of alication remains in service. <br /> solids buildup can be s s n 1a and can cause an The solids removal relationship developed in this <br /> 0 or pro em if these deposits are allowed to become study (Fig. 8) applies to fecal types of solids only. <br /> anaerobic Scott and Fulton 1979 . However, this Removal of algal solids found in lagoon effluent is <br /> problem can be avoided by occasionally disking-in more difficult to predict. Data from the Easley, <br /> the solids and allowing enough reaeration time after South Carolina,site indicated that algae removal by <br /> each application. Disking should be done on only overland flow is marginal (Pollock 1979). However, <br /> 9 <br />