Waste Output and Intensity
|
Category
|
Sub-category
|
Unit
|
Region
|
Output
|
|
|
|
|
|
2017
|
2018
|
2019
|
2020
|
2021
|
|
General
Industrial
Waste
|
Reusable
|
Metric Ton
|
Taiwan
|
19,826
|
21,676
|
21,456
|
24,958
|
24,496
|
|
Mainland China
|
11,697
|
6,815
|
9,591
|
9,499
|
10,474
|
|
Non-reusable
|
Taiwan
|
2,050
|
3,223
|
2,102
|
2,369
|
1,912
|
|
Mainland China
|
1,825
|
3,090
|
3,322
|
2,683
|
2,654
|
|
Total
|
35,398
|
34,804
|
36,471
|
39,509
|
39,536
|
|
Hazardous
Industrial
Waste
|
Reusable
|
Metric Ton
|
Taiwan
|
15,988
|
14,729
|
15,469
|
22,088
|
25,054
|
|
Mainland China
|
40,184
|
54,988
|
52,301
|
50,519
|
54,338
|
|
Non-reusable
|
Taiwan
|
412
|
1,286
|
659
|
629
|
473
|
|
Mainland China
|
1,143
|
1,388
|
2,381
|
2,470
|
2,539
|
|
Total
|
57,727
|
72,391
|
70,810
|
75,706
|
82,405
|
|
General &
Hazardous
Industrial
Waste
|
Reusable and Non-reusable
|
Metric Ton
|
Taiwan+Mainland China
|
38,275
|
40,914
|
39,686
|
50,044
|
51,935
|
|
55,256
|
66,281
|
67,595
|
65,170
|
70,005
|
|
Total
|
93,531
|
107,195
|
107,281
|
115,214
|
121,941
|
|
Total Waste
Output
Intensity
|
Reusable and Non-reusable
|
Metric Ton/ Million Revenue
|
Taiwan+Mainland China
|
1.44
|
1.42
|
1.30
|
1.31
|
1.17
|
|
Note 1: The disposal methods for the not reusable are incineration, landfilling or
other disposal operations.
Note 2: The above data does not include Chungyuan Plant, Chung Hsing Plant, Yangmei
Plant and Shanying II Plant in Taiwan.
|
Waste Reduction and Reuse Rate
Reduction Projects and Results
Pre-treatment Reduces Moisture Content to Reduce
Cleaning and Transportation Costs
In recent years, waste membrance dregs and waste filters have been imported into filter press and
centrifugal dehydration respectively, effectively reducing the weight of cleaning and transportation by
about 35% and 54%. Reducing the amount and cost of waste removal and transportation, and preventing the
risk of waste liquid leakage during the removal and transportation process can effectively reduce
environmental pollution and fulfill the corporate social responsibility of the company.
Water Content of Membrane Dreg Reduction Results
Water Content of Waste Filter Reduction Results
Waste Reduction
2021 Waste Reduction Measures and Benefits
|
Measures
|
Contents
|
Benefits
|
Unit
|
|
Unimicron
|
|
Reduction of waste solvents: Improving the
wastewater treatment system’s ability to treat solvents itself
|
Reduce Outsourcing
|
43.5
|
Metric Ton/Month
|
|
Reduction of membrane dregs: Reducing the water
content of membrane dregs
|
Reduce Outsourcing
|
5.4
|
Metric Ton/Month
|
|
Enhancing the recovery of precious metals: Building
an adsorption system to recover low concentrations of precious metals
|
Increased recovery of Precious Metals
|
0.15
|
Kg/Month
|
|
Unimicron (Kunshan)
|
|
Reducing the frequency of emptying nitric acid
tanks, thus lessening the amount of nitric acid discharge: Changing the frequency at
which nitric acid tanks are emptied from once every 30 days to once every 40 days
|
Decrease in average volume and
monthly fee from July to December 2021 compared to January to June 2021
|
3.53
12,708
|
Metric Ton/Month NT$/Month
|
|
Unimicron-FPC (Kunshan)
|
|
Ex-membrane additives reduction: Reducing membrane
usage through external additives
|
Reduce Outsourcing
|
8.5
|
Metric Ton/Month
|
|
Single-effect suction pipe: Reducing the cost of
having external vendors remove nitrogenous wastewater
|
Reduce Outsourcing
|
35
|
Metric Ton/Month
|
|
Silver fumes: Wastewater containing silver is
discharged into the wastewater plant after treatment
|
Reduce Outsourcing
|
0.58
|
Metric Ton/Month
|
|
Copper treatment: Wastewater containing copper is
discharged into the wastewater plant after copper is extracted
|
Reduce Outsourcing
|
550
|
Metric Ton/Month
|
|
Wastewater treatment: Wastewater containing copper
is discharged into the wastewater plant after cleaning
|
Reduce Outsourcing
|
18
|
Metric Ton/Month
|
|
Unimicron (Huangshi)
|
|
Reduction of waste filter: Using a filter spin-dryer
|
Reduce Outsourcing
|
10
|
Metric Ton/Month
|
|
Reduction of waste membrane dregs: Using a press
|
Reduce Outsourcing
|
120
|
Metric Ton/Month
|
|
Unimicron (Shenzhen)
|
|
Purchasing two new sludge presses with dual press
function: Sludge moisture content reduced from 75% to 61%
|
Reduce Outsourcing
|
46
|
Metric Ton/Month
|
