Environmental monitoring and services

Odor pollutant monitoring

The limits specify the primary maximum emission limits of eight malodorous pollutants, the odor concentration limits of compound malodorous substances and the plant boundary concentration limits of disorganized emission sources. This standard applies to the management of all units and landfills emitting malodorous gases to the atmosphere and the environmental impact assessment, design, completion acceptance of construction projects and the management of their emissions after completion.

Table 1 Standard values of odor pollutants at the plant boundary

Serial number	Control items	Unit	Level 1	Level 2		Level 3
Serial number	Control items	Unit	Level 1	New expansion and renovation	Existing	New expansion and renovation	Existing
1	Ammonia	mg/m3	1	1.5	2	4	5
2	Trimethylamine	mg/m3	0.05	0.08	0.15	0.45	0.8
3	Hydrogen sulfide	mg/m3	0.03	0.06	0.1	0.32	0.6
4	Methyl mercaptan	mg/m3	0.004	0.007	0.01	0.02	0.035
5	Methyl sulfide	mg/m3	0.03	0.07	0.15	0.55	1.1
6	Dimethyl disulfide	mg/m3	0.03	0.06	0.13	0.42	0.71
7	Carbon disulfide	mg/m3	2	3	5	8	10
8	Styrene	mg/m3	3	5	7	14	19
9	Odor concentration	dimensionless	10	20	30	60	70

Emission standard values of odor pollutants, see Table 2.

Table 2 Emission standard values of odor pollutants

Serial number	Control items	Height of exhaust pipe,m	Emission, kg/h
1	Hydrogen sulfide	15 20 25 30 35 40 60 80 100 120	0.33 0.58 0.90 1.3 1.8 2.3 5.2 9.3 14 21
2	Methyl mercaptan	15 20 25 30 35 40 60	0.04 0.08 0.12 0.17 0.24 0.31 0.69
3	Methyl sulfide	15 20 25 30 35 40 60	0.33 0.58 0.90 1.3 1.8 2.3 5.2
4	Dimethyl disulfide	15 20 25 30 35 40 60	0.43 0.77 1.2 1.7 2.4 3.1 7.0
5	Carbon disulfide	15 20 25 30 35 40 60 80 100 120	1.5 2.7 4.2 6.1 8.3 11 24 43 68 97
6	Ammonia	15 20 25 30 35 40 60	4.9 8.7 14 20 27 35 75
7	Trimethylamine	15 20 25 30 35 40 60 80 100 120	0.54 0.97 1.5 2.2 3.0 3.9 8.7 15 24 35
8	Styrene	15 20 25 30 35 40 60	6.5 12 18 26 35 46 104
		Exhaust height, m	Standard value (dimensionless)
9	Stench concentration	15 25 35 40 50 ≥60	2000 6000 15000 20000 40000 60000

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