. 2009 Jan 8;9(1):311–326. doi: 10.3390/s90100311

Table 4.

Measurements of the Selected Odorous Compounds during Summer Time.

Treatment Process	Unit: ppb	NH₃	H₂S	CH₃SH	(CH₃)₂S	(CH₃)₂S₂	(CH₃)₃N
Primary settling basin	Morning	506	23.86	7.34	No detection	207.90	2.84
	Afternoon	340	20.23	4.34	No detection	3.03	1.33
	Mean	423	22.05	5.84		105.47	2.09
	SD	117	2.57	2.12		144.86	1.07
Aeration basin	Morning	120	26.79	No detection	No detection	2.20	No detection
	Afternoon	270	26.62	No detection	No detection	1.75	No detection
	Mean	195	26.71			1.98
	SD	106	0.12			0.32
Final settling basin	Morning	181	4.35	No detection	No detection	3.56	No detection
	Afternoon
	Mean	181	4.35			3.56
	SD
Low Detection Limit		7.50	0.14	0.17	0.15	0.17	0.22