Contents
1.2.1 MAJOR ACTIVITIES UNDERTAKEN
ANNEX B Project Organisation Chart and
Contact Detail
List
of Tables
Table 1.1 Summary of Activities Undertaken in the
Reporting Period
Table 2.1 Hourly Average of Parameters Recorded for
CAPCS
Table 2.2 Hourly Average of Parameters Recorded for
CHP 1
Table 2.3 Hourly Average of Parameters Recorded for
CHP 2
Table 2.4 Hourly Average of Parameters Recorded for
CHP 3
Table 2.5 Hourly Average of Parameters Recorded for
ASP
Table 2.6 Hourly Average of Parameters Recorded for
the Standby Flaring Gas Unit
Table 2.7 Quantities
of Waste Generated from the Operation of the Project
The construction works of No.
EP/SP/61/10 Organic Resources Recovery Centre Phase 1 (the
Project) commenced on 21 May
2015. This is the 40th Quarterly
Environmental Monitoring and Audit (EM&A) report presenting the EM&A
works carried out during the period from 1 March 2025 to 31 May 2025 in
accordance with the EM&A Manual.
Non-compliance of emission limits of
NOx and HCl from CHP1; NOx from CHP3; NOx, SO2,
NH3 and HCl from the ASP; and HF from the Standby Gas Flaring Unit
were recorded during March 2025.
Non-compliance of emission limits of
Dust and Total Odour from CAPCS; NOx from CHP1; NOx from
CHP3 and NOx, SO2, NH3 and HCl from the ASP
were recorded during April 2025.
Non-compliance of emission limits of Total
Odour from CAPCS; NOx from CHP1; NOx from CHP2; NOx,
SO2 and HCl from CHP3; NOx, SO2, NH3,
and HCl from the ASP; and NOx, SO2, VOC, HCl and HF from
Standby Gas Flaring Unit were recorded during May 2025.
Exceedances occurred due to system instability, equipment tripped (stopped and restarted) and normal equipment start up process/ stopping process
(1-3hrs), and ASP tripping.
Exceedances for the air emission limits for the CAPCS, CHP, ASP stacks,
and Standby Gas Flaring Unit were recorded during the reporting period.
No complaint was received during the
reporting period.
The Organic Resources Recovery
Centre (ORRC) Phase I development (hereinafter referred to as “the Project”) is
to design, construct and operate a biological treatment facility with a
capacity of about 200 tonnes per day and convert source-separated organic waste
from commercial and industrial sectors (mostly food waste) into compost and
biogas.
ERM-Hong Kong, Ltd (ERM)
has been appointed by OSCAR as the Environmental Team (ET) for the construction
phase EM&A programme and the Monitoring Team (MT) for the operation phase
EM&A programme for the implementation of the EM&A programme in accordance with the
requirements of the EP and the approved EM&A Manual.
The Project Site is located at Siu Ho Wan in
North Lantau with an area of about 2 hectares. The facility received an average
of 84.09 to 96.93 tonnes and treated an average of 64.84 to 80.60 tonnes of
source separated organic waste per day during the reporting period.
A summary of the major activities undertaken in
the reporting period is shown in Table 1.1.
Table 1.1 Summary of Activities Undertaken in the
Reporting Period
|
Activities Undertaken in the Reporting Period |
|
·
Operation of the Project, including organic waste
reception, operation of the pre-treatment facilities, anaerobic digesters,
composting facilities, air pollution control systems, on-line emission
monitoring system for the Centralised Air Pollution Control Unit (CAPCS), Co generation Units (CHP)s and Ammonia Stripping Plant
(ASP), and the wastewater treatment plant; ·
Cleaning of combustion chamber of CHP2; and ·
Cleaning of SBT. |
The concentrations of concerned air
pollutants emitted from the stacks of the CAPCS, CHP, ASP and Standby Flaring
Gas Unit during the reporting period are monitored on-line by the continuous
environmental monitoring system (CEMS). The number of exceedances of the
concerned air emissions monitored for the CAPCS, CHP, ASP and Standby Flaring
Gas Unit during this reporting period are presented in Tables 2.1 to 2.6.
It should be noted that measurements recorded
under abnormal operating conditions, e.g., start up and stopping of stacks and
unstable operation, as well as test runs and interference of sensor, are
disregarded.
Table 2.1 Hourly Average of Parameters Recorded for
CAPCS
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) |
Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
VOCs (including
methane) (a) |
0
– 67 |
680 |
Nil |
Nil |
|
Dust
(or TSP) |
0
– 9 |
6 |
Identified
(c) |
System
unstable (e.g., low efficiency) |
|
Odour (including
NH3 & H2S) (b) |
0
– 975 |
220 |
Identified
(d) |
System
unstable (e.g., low efficiency) |
|
Notes: (a) The VOCs
emission limit includes methane as biogas is adopted, as fuel in the
combustion process. (b) The odour
unit is OU/Nm3. (c) Dates with
Dust exceedances (number of exceedances on that day) were identified on 11(1)
and 27(2) April 2025. (d) Dates with
Odour exceedances (number of exceedances on that day) were identified on 9(7),
10(4), 11(1), 12(3), 13(7), 14(7), 15(2), 16(3), 19(2), 20(11), 21(6), 22(5),
23(6), 24(11), 25(3), 28(2) and 30(2) April 2025; and 2(1), 4(3), 5(4), 6(4),
7(5), 12(4), 13(1), 16(13), 17(11), 18(1), 19(2) and 21(5) May 2025 . |
||||
Table 2.2 Hourly Average of Parameters Recorded for
CHP 1
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3)
(a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 14 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 650 |
650 |
Nil |
Nil |
|
NOx |
0 – 506 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 45 |
50 |
Nil |
Nil |
|
VOCs (including methane)
(b) |
0 – 1,397 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 82 |
10 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 6% and
dry basis. (b) The VOCs emission limit includes methane as biogas is
adopted as fuel in the combustion process. (c) Dates with
NOx exceedances (number of exceedances on that day) were
identified on 14(5), 15(5), 16(6), 17(1), 18(9), 19(21), 20(24), 21(15),
24(10), 25(10) and 26(16) March 2025; 14(3), 17(6), 19(2) and 24(1) April
2025; and 23(7), 24(24), 25(24), 26(14), 27(13), 28(9), 29(8), 30(11) and
31(1) May 2025. (d) Date with HCl
exceedance (number of exceedance on that day) was
identified on 16(1) March 2025. |
||||
Table 2.3 Hourly Average of Parameters Recorded for
CHP 2
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3)
(a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 15 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 650 |
650 |
Nil |
Nil |
|
NOx |
0 – 410 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 50 |
50 |
Nil |
Nil |
|
VOCs (including methane) (b) |
0 – 528 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 8 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 6% and
dry basis. (b) The VOCs emission limit includes methane as biogas is
adopted as fuel in the combustion process. (c) Dates with
NOx exceedances (number of exceedances on the day) were identified
on 22(3) and 23(7) May 2025. |
||||
Table 2.4 Hourly Average of Parameters Recorded for
CHP 3
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust
(or TSP) |
0
– 9 |
15 |
Nil |
Nil |
|
Carbon
Monoxide |
0
– 277 |
650 |
Nil |
Nil |
|
NOx |
0
– 682 |
300 |
Identified
(c) |
System
unstable (e.g., low efficiency) |
|
SO2 |
0
– 71 |
50 |
Identified
(d) |
System
unstable (e.g., low efficiency) |
|
VOCs (including methane) (b) |
0
– 1,051 |
1,500 |
Nil |
Nil |
|
HCl |
0
– 126 |
10 |
Identified
(e) |
System
unstable (e.g., low efficiency) |
|
HF |
0
– 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 6% and dry basis. (b) The VOCs emission limit includes methane as biogas is
adopted as fuel in the combustion process. (c) Dates with NOx
exceedances (number of exceedances on the day) were identified on 1(4), 2(1),
4(2), 5(4), 6(5), 7(3), 8(1), 9(5), 11(1), 12(6), 13(17), 14(3), 16(2),
17(14), 18(13), 21(4), 22(6), 23(11), 24(3), 25(1), 27(8), 28(6), 29(8),
30(16) and 31(16) March 2025; 1(14), 2(16), 3(18), 4(15), 5(19), 6(11), 7(6),
8(8), 9(12), 10(16), 11(14), 12(19), 13(23), 14(16), 15(10), 16(16), 17(12),
18(17), 19(16), 20(22), 21(20), 22(21), 23(18), 24(16), 25(7), 26(2), 28(6),
29(15) and 30(2) April 2025; and 3(1), 4(11), 5(17), 6(9), 7(9), 8(19),
9(16), 10(13), 11(9), 12(19), 13(24), 14(23), 15(18), 16(20), 17(24), 18(17),
19(15), 20(18), 21(24), 22(11), 23(18), 24(7), 25(4), 26(5), 27(9), 28(11),
29(21), 30(22) and 31(14) May 2025. (d) Dates
with SO2 exceedances (number of exceedances on
the day) were identified on 3(1), 4(1), 9(1), 10(2), 15(3) and 20(1) May 2025. (e) Dates with
HCl exceedances (number of exceedances on that day) were identified on 3(1),
4(6), 5(3), 6(1), 7(2), 9(1), 10(2), 14(1) and 15(1) May 2025. |
||||
Table 2.5 Hourly Average of Parameters Recorded for
ASP
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust
(or TSP) |
0
– 5 |
5 |
Nil
|
Nil |
|
Carbon
Monoxide |
0
– 99 |
100 |
Nil
|
Nil
|
|
NOx |
0
– 1,794 |
200 |
Identified
(c) |
System
unstable (e.g., low efficiency), Equipment Tripped (Stopped and Restarted)
and Normal Equipment Start-up Process / stopping Process (1-3hr), ASP
tripping |
|
SO2 |
0
– 244 |
50 |
Identified
(d) |
System
unstable (e.g., low efficiency), ASP tripping |
|
VOCs (including methane) (b) |
0
– 20 |
20 |
Nil
|
Nil |
|
NH3 |
0
– 340 |
35 |
Identified
(e) |
System
unstable (e.g., low efficiency), ASP tripping |
|
HCl |
0
– 50 |
10 |
Identified
(f) |
System
unstable (e.g., low efficiency), ASP tripping |
|
HF |
0
– 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) The VOCs emission limit include methane as biogas is
adopted as fuel in the combustion process. (c) Dates with NOx
exceedances (number of exceedances on the day) were identified on 1(21),
2(17), 3(20), 4(16), 5(23), 6(13), 7(22), 8(24), 9(10), 10(10), 11(16),
12(5), 21(2), 22(12), 23(15), 24(13), 25(8), 26(12), 27(16), 28(22), 29(22),
30(20) and 31(13) March 2025; 1(23), 2(19), 3(15), 4(24), 5(21), 6(12),
7(15), 8(17), 9(20), 10(21), 11(18), 12(24), 13(24), 14(24), 15(19), 16(23),
17(17), 18(24), 19(24), 20(24), 21(22), 22(21), 23(24), 24(24), 25(24),
26(24), 27(24), 28(21), 29(19) and 30(22) April 2025; and 1(7), 2(2), 3(8),
4(21), 5(13), 6(23), 7(23), 8(21), 9(22), 10(21), 11(21), 12(15), 13(19),
14(23), 15(22), 16(18), 17(23), 18(24), 19(24), 20(16), 21(24), 22(24),
23(23), 24(24), 25(24), 26(19), 27(12), 28(19), 29(19), 30(23) and 31(22) May
2025. (d) Dates with
SO2 exceedances (number of exceedances on the day) were identified
on 25(1) and 26(1) March 2025; 3(1), 19(2), 23(2), 24(1), 28(1) and 30(2)
April 2025; and 1(8), 2(2), 3(8), 4(23), 5(4), 6(1), 9(1), 10(4), 11(17),
12(15), 13(15), 14(21), 15(21), 16(18), 17(19), 18(20), 19(19), 20(16),
21(23), 22(17), 25(1), 28(4) and 29(1) May 2025. (e) Dates with
NH3 exceedances (number of exceedances on the day) were identified
on 1(4), 2(1), 3(2), 5(1), 9(1), 10(2), 11(6), 12(1), 23(10), 24(7), 25(4),
27(3), 28(3) and 29(1) March 2025; 3(3) 7(3), 9(1), 11(1), 16(2), 18(1),
19(6), 21(2), 23(8), 24(3), 25(1), 26(1) and 28(3) April 2025; and 4(2),
6(4), 7(1), 9(3), 10(3), 11(5), 12(2), 13(2), 14(1), 15(7), 17(3), 19(4),
20(1), 22(5), 23(2), 24(2), 25(2), 28(8) and 29(2) May 2025. (f) Dates with
HCl exceedances (number of exceedances on the day) were identified on 25(1)
March 2025; 3(1), 19(1), 23(1), 24(1) and 28(1) April 2025; and 1(6), 2(2),
3(2), 6(1), 9(1), 12(1), 22(4), 25(1) and 28(2) May 2025. |
||||
Table 2.6 Hourly Average of Parameters Recorded for
the Standby Flaring Gas Unit
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust
(or TSP) |
0
– 0 |
5 |
Nil |
Nil |
|
Carbon
Monoxide |
0
– 12 |
100 |
Nil |
Nil |
|
NOx |
0
– 1,402 |
200 |
Identified (c) |
Normal Equipment start up process/
stopping process (1-3hrs) |
|
SO2 |
0
– 62 |
50 |
Identified (d) |
Normal Equipment start up process/
stopping process (1-3hrs) |
|
VOCs (including methane) (b) |
0
– 5,761 |
20 |
Identified (e) |
Normal Equipment start up process/
stopping process (1-3hrs) |
|
HCl |
0
– 239 |
10 |
Identified (f) |
Normal Equipment start up process/
stopping process (1-3hrs) |
|
HF |
0
– 5 |
1 |
Identified (g) |
Normal Equipment start up process/
stopping process (1-3hrs) |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) The VOCs
emission limit include methane as biogas is adopted as fuel in the combustion
process. (c) Date with NOx
exceedances (number of exceedances on that day) were identified on 15(6) May
2025. (d) Date with SO2
exceedance (number of exceedance on that day) was
identified on 15(1) May 2025. (e) Date with
VOC exceedances (number of exceedances on that day) was identified on 15(6)
May 2025. (f) Date with
HCl exceedances (number of exceedances on that day) was identified on 15(6)
May 2025. (g) Dates with
HF exceedances (number of exceedances on that day) were identified on 16(4)
and 26(1) March 2025; and 15(6) May 2025. |
||||
No monthly odour patrol was required
to be conducted for this reporting period.
Environmental mitigation measures (related to
air quality, water quality, waste, land contamination, hazard-to-life, and
landscape and visual) to be implemented during the operation phase of the
Project are recommended in the approved EIA Report and EM&A Manual. Monthly
site audits for March 2025 to May 2025 have been carried out to check the
implementation of these mitigation measures. Follow-up actions resulting
from the site audits were generally taken as reported by the Contractor.
The Contractor has implemented environmental mitigation measures recommended in
the approved EIA Report and EM&A Manual.
The monthly inspections of the landscape and
visual mitigation measures for the operation phase of the Project were performed
on 26 March 2025, 22 April 2025 and 30 May 2025, and no non-compliance in
relation to the landscape and visual mitigation measures were identified.
Wastes generated from the operation of the
Project include chemical waste, wastes generated from pre-treatment process and
general refuse. The quantities of different types of waste generated from
the operation of the Project in the reporting period are summarised in Table
2.7.
Table 2.7
Quantities of Waste Generated from the Operation of the Project
|
Month / Year |
Chemical Waste |
Waste Generated from |
General Refuse |
||
|
|
Disposal of at CWTC |
Disposed of at Landfill (a) |
Recycled (b) |
Disposed of at Landfill (a) (e) |
Recycled (c) |
|
March
2025 |
34,800
L (d) |
548.97
tonnes |
0
tonnes |
2.995
tonnes (e) |
0.031
tonnes |
|
April
2025 |
0
L (d) |
616.80
tonnes |
0
tonnes |
2.534
tonnes (e) |
0.039
tonnes |
|
May
2025 |
0
L (d) |
506.36
tonnes |
0
tonnes |
2.765
tonnes (e) |
0.054
tonnes |
|
Notes: (a) Waste generated
from pre-treatment process and general refuse other than chemical waste and
recyclables were disposed of at NENT landfill by sub-contractors. (b) Among waste
generated from pre-treatment process, no metals, papers/ cardboard packing or
plastics were sent to recyclers for recycling during the reporting period. (c) Among
general refuse, 0.002 tonnes of metals, 0.106 tonnes of papers/ cardboard
packing and 0.016 tonnes of plastics were sent to recyclers for recycling
during the reporting period. (d) 34,800 L of
chemical waste (30,000 L of unwanted flocculation agent and 4,800 L of spent
activated carbon) were disposed of at CWTC in March 2025, no chemical waste
was disposed of at CWTC in April 2025 and May 2025. (e) It was
assumed that four 240-litre bins filled with 80% of general refuse were
collected at each collection. The general refuse density was assumed to be
around 0.15 kg/L. |
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