Performance Analysis of Solar Still by Using Octagonal-Pyramid Shape in the Solar Desalination Techniques

Table 1

Chemical examination of saline water and desalinated water.

Sl. No.	Chemical examination	Permissible limit	Bore water	Desalinated bore water	Sea water	Desalinated sea water	Leather industrial waste	Desalinated leather industrial waste	Plastic industrial waste	Desalinated plastic industrial waste
1	Turbidity (NT units)	5	1	1	2	1	160	3	240	1
2	Total dissolved solids (mg/L)	2000	320	675	33250	1680	5530	1960	23100	1820
3	pH	6.5-8.5	8.1	6.6	7.8	7.4	7.6	7.1	6.8	7.4
4	Total alkalinity as CaCo3 (mg/L)	600	335	100	280	125	800	190	1200	410
5	Total hardness as CaCo3 (mg/L)	600	460	150	8600	320	1300	320	5200	580
6	Calcium as Ca (mg/L)	200	96	32	480	72	420	72	400	120
7	Magnesium as Mg (mg/L)	100	53	16	1776	34	144	34	1008	67
8	Sodium as Na (mg/L)	—	220	130	6500	380	890	520	4600	320
9	Potassium as K (mg/L)	—	16	8	430	24	16	8	240	24
10	Iron as Fe (mg/L)	0.3	0	0	0.2	0	14.0	0.2	22	0
11	Free ammonia as NH3 (mg/L)	0.5	0	0	0	0	6.8	0	11.9	0.16
12	Nitrite as NO3 (mg/L)	45	5	0	15	0	30	6	25	12
13	Chloride as CL (mg/L)	1000	380	230	15500	680	2300	820	9400	580
14	Fluoride as F (mg/L)	1.5	0.8	0.2	1.6	0.4	1.6	0.8	1.8	1.0
15	Sulphate as SO4 (mg/L)	400	40	25	1450	35	145	85	685	60
16	Phosphate as PO4 (mg/L)	—	0	0	0	0	2.0	0.8	4.0	0.6
17	Tidy’s test 4 hrs. as O2 (mg/L)	—	0.64	0.52	1.12	0.60	1.04	0.51	1.64	0.72