Reduction of Turbidity of Water Using Locally Available Natural Coagulants

Table 1

Reduction efficiency of turbidity using different coagulants in different turbidity ranges.

Coagulants	Dose used (mg/L)	% of turbidity reduction (High-*turbidity water)	% of turbidity reduction (Medium-*turbidity water)	% of turbidity reduction (Low-*turbidity water)
Moringa oleifera	50	86.9	65.62	56
	60	87.3	66.45	57.2
	70	89.4	67.29	58
	80	90	68.54	58.8
	90	90.8	68.95	59.2
	100	94.1	69.37	60
Cicer arietinum	50	93.78	74.28	62.58
	60	94.63	74.69	64.51
	70	95.15	79.18	66.12
	80	95.26	81.02	70
	90	95.47	81.42	70.96
	100	95.89	81.63	71.29
Dolichos lablab	50	84.5	65.10	49.71
	60	86	65.91	51.42
	70	86.6	66.73	56.28
	80	87.7	67.55	57.14
	90	88.4	67.75	59.42
	100	88.9	68.16	60.85

* For Moringa oleifera (high turbidity = 100 NTU, medium turbidity = 48 NTU, low turbidity = 25 NTU); Cicer arietinum (high turbidity = 95 NTU, medium turbidity = 49 NTU, low turbidity = 31 NTU); Dolichos lablab (high turbidity = 100 NTU, medium turbidity = 49 NTU, low turbidity = 35 NTU), and for alum high turbidity was 100 NTU.