CHAPTER 1: Source and Characteristics of Industrial Wastewaters 49 1.2. A tomato-processing plant is shown in Fig. P1.2. The industrial waste survey data are shown in the table below. Develop a flow-and-material balance diagram for the plant sewer system. Show possible changes to reduce the flow and loading. The waste from the trimming tables is presently flumed to the sewer. Sampling station Process unit Flow, gal/min BOD, mg SS, mg/1 500 180 75 90 300 30 340 20 7575 10 1 Niagra washers 2 Rotary washers 3 Pasteurizer 4 4 Source cooker 5 Cook room 6 Source finisher 7 7 Trimming tables 8 Main outfall Note: gal/min = 3.78 x 10-3 m /min 20 150 3520 4410 230 450 240 8890 170 100 540 1080 470 Receiver pl Spin cooler Juice flere and sener Savce liens and saamer Chionineton Sauce Antaner unk Catsup filler and copper HG2 Process low Sewer layout Station numbers Indicate sampling and measuring points Cookroom finisher) Sauce cocher Pasteurizer Cyclone Crotone Stallion 3 Fron waler Roguy washers Trimming tabi To turno Nagd washem Floor plan Serwer Men sewer FIGURE P1.2 Flow diagram of a tomato-processing plant