Evaluation of Solar Photosensitised River Water Treatment in the Caribbean

Table 1

Mean water temperatures (°C), pH, flow rates (litres/hour), daily sunlight exposure time (hours), solar intensity (W/m²), and influent microbial pollutant concentration (CFU/mL) from June 2008 to May 2010. Average daily operational time was 9.5 hours.

Month; (June-May)	Water temperature (°C)		pH		Flow rate; (litres/hr)	Intensity; (W/m^2)	Influent faecal coliform; (CFU/mL)
	Inflow	Outflow	Inflow	Outflow
1	27.7	29.8	7.31	7.32	18.2	41	805
2	28.8	30.5	7.30	7.33	19.5	43	415
3	34.5	36.2	7.24	7.42	17.1	48	1595
4	36.0	38.4	7.37	7.49	20.5	56	1145
5	35.1	37.8	7.37	7.36	18.3	55	1380
6	36.3	38.5	7.61	7.70	22.8	46	2200
7	36.4	41.3	7.86	7.82	16.7	54	725
8	32.3	35.3	7.85	7.90	24.0	55	585
9	31.0	36.7	7.87	7.83	19.6	42	1595
10	33.8	37.4	7.70	7.75	22.3	46	2250
11	32.5	38.8	7.64	7.71	22.7	48	3470
12	33.9	35.2	7.40	7.43	21.4	54	3940
13	34.8	36.7	7.47	7.44	19.1	55	4665
14	32.1	35.3	7.40	7.44	22.8	39	3185
15	26	33.8	7.36	7.43	17.7	41	2070
16	27.5	30.0	7.31	7.35	18.6	47	1030
17	26.4	28.7	7.27	7.31	18.2	43	695
18	27.5	28.4	7.26	7.24	21.8	45	310
19	31.3	34.6	7.25	7.35	23.4	36	1475
20	35.2	37.9	7.33	7.38	20.9	34	4095
21	34.8	38.5	7.17	7.28	19.4	44	4830
22	35.1	37.3	7.29	7.28	23.7	47	3330
23	32.8	35.1	6.88	7.33	24.5	51	2200
24	33.5	37.2	7.38	7.35	24.6	50	1145