WEBVTT 00:00.009 --> 00:03.200 Hi , I'm AJ Moore . I'm a COR here at 00:03.200 --> 00:05.311 the Burnett Reservoir Water Treatment 00:05.311 --> 00:08.159 mission . I'm a civil engineer from New 00:08.159 --> 00:10.079 Orleans district , and I am Tyler 00:10.079 --> 00:12.159 Baggett , also a COR on the water 00:12.159 --> 00:14.479 mission here , uh , also from the New 00:14.479 --> 00:16.719 Orleans district and also a civil 00:16.719 --> 00:18.941 engineer . So we're here at the Burnett 00:18.941 --> 00:20.959 Reservoir providing a pre-treatment 00:20.959 --> 00:23.129 system . For the city of Asheville , 00:23.260 --> 00:25.260 Hurricane Eline really affected the 00:25.260 --> 00:27.559 water quality and its clarity and the 00:27.559 --> 00:29.837 amount of solids that are in the water . 00:29.837 --> 00:32.059 The city of Asheville's water treatment 00:32.059 --> 00:34.639 plant is one of two within the nation 00:34.639 --> 00:36.930 that is a direct filtration system . So 00:36.930 --> 00:39.041 it doesn't have the ability to remove 00:39.041 --> 00:41.369 these suspended solids . Our system is 00:41.369 --> 00:43.450 designed to remove those solids that 00:43.450 --> 00:45.506 are suspended in the water . The way 00:45.506 --> 00:47.728 that the system works is that there's , 00:47.728 --> 00:49.783 there's a lot of suspended solids or 00:49.783 --> 00:51.672 turbidity in the water , which is 00:51.672 --> 00:54.169 sediment , clay particles , really fine 00:54.169 --> 00:56.280 things . We have some pumps up on the 00:56.280 --> 00:58.447 reservoir that take all the water with 00:58.447 --> 01:00.391 the turbidity all . introduce some 01:00.391 --> 01:02.680 chemicals , some caustic caustic adjust 01:02.680 --> 01:05.269 the pH and alum . An alum is something 01:05.269 --> 01:07.380 to make sure that all the dirt inside 01:07.380 --> 01:09.436 the water sticks together . So we do 01:09.436 --> 01:11.380 that , try to get the water into a 01:11.380 --> 01:13.436 perfect state to where we can get as 01:13.436 --> 01:15.769 much dirt to stick together as possible . 01:15.769 --> 01:17.991 Those pumps push it up , goes to a tube 01:17.991 --> 01:19.991 where it slows down a little bit to 01:19.991 --> 01:22.158 where the particles have enough time . 01:22.158 --> 01:24.790 To mix with the chemicals and uh also 01:24.790 --> 01:26.734 stick together so as more and more 01:26.734 --> 01:28.846 stick together and the chemicals play 01:28.846 --> 01:31.012 around with it , you start to get this 01:31.012 --> 01:33.179 thing called flocculation which is the 01:33.179 --> 01:35.401 coagulation . All the dirt is trying to 01:35.401 --> 01:37.623 grab together as much as possible prior 01:37.623 --> 01:39.889 to hitting the system which are gaffs , 01:39.910 --> 01:42.190 dissolved air flotation systems . We 01:42.190 --> 01:44.412 have all this clumped up . Dirt goes up 01:44.412 --> 01:46.940 the hill , gets into the daff itself . 01:47.239 --> 01:49.295 Once it gets into the daff , it , it 01:49.295 --> 01:51.406 has an integrated flock tube . It's a 01:51.406 --> 01:53.350 white tube that you're introducing 01:53.350 --> 01:55.350 polymer into , and then the polymer 01:55.350 --> 01:57.559 turns it into a glue that wants it all 01:57.559 --> 01:59.670 to stick together and then you get to 01:59.670 --> 02:01.726 really see it . We have a motor that 02:01.726 --> 02:03.726 pulls air from the the atmosphere , 02:03.726 --> 02:06.099 pumps air with the water into a . Pill 02:06.099 --> 02:08.229 like cylinder where it's constantly 02:08.229 --> 02:10.759 compressing the air down into the water . 02:10.880 --> 02:14.320 The water that's has the alum , caustic , 02:14.460 --> 02:17.080 and the polymer enters the daff , so 02:17.080 --> 02:19.302 you have to dissolved there . The water 02:19.302 --> 02:21.559 is coming through with the solids , and 02:21.559 --> 02:23.781 the bubbles are trying to push it up to 02:23.781 --> 02:26.080 the top flotation . So the floatation 02:26.440 --> 02:28.440 makes a flock blanket , so you have 02:28.440 --> 02:30.607 that all at the top , and then we have 02:30.607 --> 02:32.607 a rake that scoops it right off and 02:32.607 --> 02:34.829 then it returns to its normal treatment 02:34.829 --> 02:36.884 process like nothing ever happened . 02:36.884 --> 02:38.940 All the things that we added into it 02:38.940 --> 02:41.107 are able to be taken out by the plants 02:41.107 --> 02:43.107 in place filters , the float or the 02:43.107 --> 02:45.218 flock blanket or the dirt that was in 02:45.218 --> 02:47.496 the water all gets scooped off the top , 02:47.496 --> 02:49.662 goes down another tube into the city's 02:49.662 --> 02:51.496 normal lagoon , and the normal . 02:51.496 --> 02:53.718 Lagoons just have a longer time to keep 02:53.718 --> 02:55.949 the dirt there to where it settles out 02:55.949 --> 02:58.116 naturally , which we don't really have 02:58.116 --> 03:00.171 the time for in the reservoir itself 03:00.171 --> 03:02.282 and that handles out through a normal 03:02.282 --> 03:04.505 process of just waiting enough time for 03:04.505 --> 03:06.671 that dirt to settle out and then clean 03:06.671 --> 03:08.782 water constantly gets from one lagoon 03:08.782 --> 03:10.949 to another until it gets put back into 03:10.949 --> 03:13.171 Swananoa River . But yeah , that's kind 03:13.171 --> 03:15.227 of the process . We've been here for 03:15.227 --> 03:15.029 like 4 months and we'll be here until 03:15.270 --> 03:16.309 it's done . It's done .