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NaturalCapital
05 / Key Capitals
Renewable Direct Materials
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
0
Tonnes
Sugarcane
2018 2017 2016
BagasseRaw sugarMolassesWood chipsWater91
4,00
9
313,
844
94,2
56
85,1
34
10.5
6
7,58
6.95
8
1,05
4,68
9
360,
042
100,
914
60,1
36
1,31
0
9,05
6,62
7
1,16
3,48
2
396,
282
118,
480
70,6
93
1,36
9
9,62
9,37
4
Natural Capital considers all the natural resources used to deliver our products and services, such as raw materials, water, energy and environmental management components.
Materials Management
Omnicane highly believes in the principles of circular economy, i.e., the rational management and value addition of raw materials entering our different business operations. Our renewable direct materials include sugarcane used in our sugar factory, raw sugar used in our refinery, bagasse used in our power plants, molasses used in our bioethanol distillery, and water used in our different process operations. Non-renewable input materials refer mainly to imported coal, which is used within our power plants as well as transportation fuel used in our logistics operations. The Integration Chart describes the flow of materials at the La Baraque cluster.
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Cane
Milling
Refinery Food Grade CO2 Bioethanol Distillery
Coal Carbon Burn-Out
Construction/BuildingIndustry
Raw Sugar
Bagasse
Steam
CogenerationPower Plant Electricity
forNationalGrid
ElectricityMolasses
Bio-Fuel
Refined Sugar
Steam & Electricity
CMS Bio-Fertilisers Biogas* Vinasse
ElectricitySteam
Steam
Electricity
Coal Fly &Bottom Ash
Steam
Cement Additive
Elec
trici
tySt
eam
* The biogas project is still a project to be implemented, awaiting necessary approvals from authorities.
In 2018, the total amount of renewable direct materials used was 8,994,212 tonnes (2017: 10,633,718 tonnes) whereas the total amount of non-renewable direct materials used was 356,602 tonnes (2017: 409,740 tonnes). This decrease can be explained by a lower amount of sugarcane crushed in our sugar factory, resulting in less bagasse, and lower usage of woodchips by our Small Energy Plant due to reduced operations. Also, less coal was used in our power plants.
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La Baraque Cluster Integration Chart
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NaturalCapital (cont’d)
05 / Key Capitals
Indirect Non-Renewable Materials
3,300
3,000
2,700
2,400
2,100
1,800
1,500
1,200
900
600
300
0
Tonnes 30,000
25,000
20,000
15,000
10,000
5,000
0
Litres
2018 2017 2016
865.8
8.1
2.6
1,796
352.2
14.3
2.5
2,219
46615.8
2.6
2,537
22,45923,670 24,420
7,580
1,221 1,217 1,321
7,443 6,667
Pesticides (tonnes)
Herbicides (tonnes)
Fertilizers (tonnes)
Chemicals (tonnes)
Pesticides (litres)
Chemicals (litres)
Herbicides (litres)
Co-ProductsSome 821 tonnes of scum (2017: 1,267 tonnes) were produced by our sugar factory and distributed to small planters in the region for application as bio-fertiliser. On the energy side, some 100,717 tonnes of coal and bagasse ash (2017: 95,159 tonnes) were produced by our power plants.
Renewable Source/GJ 2018 2017 2016
Direct primary energy purchased - - -Plus direct primary energy produced 1,333,527 1,704,896 1,911,231Minus direct primary energy sold (354,797) (401,955) (452,683)Total direct energy consumption from renewable sources 978,730 1,302,941 1,458,548
Non-Renewable Source/GJ 2018 2017 2016
Direct primary energy purchased 100,561 70,994 68,676Plus direct primary energy produced 2,910,451 3,858,377 3,660,827Minus direct primary energy sold (2,056,699) (2,281,453) (2,140,470)Total direct energy consumption from renewable sources 5,067,712 1,647,918 1,589,032
Sugar Factory 2018 2017 2016
Specific steam consumption in kg/tonne of sugarcane crushed 373 414 395
Specific electricity consumption in KWh/tonne of sugarcane crushed 22.2 20.8 21.5
Refinery 2018 2017 2016
Specific steam consumption in kg/tonne of refined sugar produced 1.49 2.06 1.99
Specific electricity consumption in KWh/tonne of refined sugar produced 88.6 62 63.2
Distillery 2018 2017 2016
Specific steam consumption in kg/litre of bioethanol produced 5.6 4.9 5.1
Specific electricity consumption in KWh/litre of bioethanol produced 0.23 0.22 0.24
Energy Management
Omnicane recognises that developing a sound energy management strategy involves the smart use of renewable and non-renewable energy resources in our business operations. Our sugar factory was successfully certified to the ISO 50001 Energy Management System in 2019 while our sugar refinery continued to achieve energy savings through improved process re-engineering. Furthermore, with the coming into operation of our Carbon Burn-Out unit in 2018, we produced 1,561 MWh of electricity from the combustion of coal ashes recovered from our power plants for internal consumption. An analysis of our direct energy consumed from renewable and non-renewable sources demonstrates the following results:
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Energy Efficiency
We put much emphasis on demand-side management and energy efficiency in our operations. For instance, our investments in energy-efficient equipment in the last few years have continued to bear fruit and we have achieved energy savings mainly in our sugar factory. However, the specific energy consumption for the refinery has increased due to reduced operations in 2018.
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Non-Renewable Direct Materials
450,000400,000350,000300,000250,000200,000150,000100,00050,000
0
Tonnes
Coal
2018 2017 2016
Coal Ash
339,762
409,740382,183
0016,840
Non-renewable indirect materials include pesticides, herbicides, chemical fertilisers and industrial chemicals used in our operations and these totalled 2,692 tonnes and 31,005 litres in 2018 (2017: 2,588 tonnes and 32,330 litres). It should be noted that following the implementation of the Bonsucro Production Standard, less herbicides were used in the fields.
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Renewable indirect materials consist of Concentrated Molasses Solids (CMS) and carbon dioxide. In 2018, 90,351 tonnes of renewable indirect materials (2017: 57,364 tonnes) were supplied.
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NaturalCapital (cont’d)
05 / Key Capitals
Surface Water Consumption
Total Water Consumption (m3)
Tap Water Consumption
Thermal LB37%
Thermal SA21%
Agriculture22%
Distillery 7%
SugarFactory7% Refinery
6%
Milling48%
HolidayInn34%
Logistics5%
Agriculture6%
Thermal LB3%
Thermal SA4%
2018
2017
2016
7,644,522
9,114,159
9,679,358
Water Management
Water is an essential strategic resource for Omnicane’s operations. In 2018, the total surface water used was 4,666,768 m3 (2017: 5,587,198 m3) whereas the total amount of groundwater abstracted was 2,920,189 m3 (2017: 3,469,429 m3). As far as tap water consumption is concerned, this amounted to a total of 57,564 m3 in 2018 (2017: 55,532 m3). Overall, the Group’s water consumption has decreased by about 16.1% due to the following: strict monitoring in our sugar factory leading to reduced wastage, lower production levels in the refinery and La Baraque power plant. It should be noted that excess process water from milling operations and the distillery during harvest time is available for reuse in the irrigation of sugarcane fields. Moreover, we do not operate in water-stressed regions and our water usage does not compete with sources of domestic water supply. It should be noted that abstracted ground water is used in our agricultural operations for irrigation purposes.
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Thermal – St Aubin
Coal as Fuel Concentration @ 15% Oxygen
Min Max EPA 1998 Standards Carbon dioxide (%) 4.8 5.3 None
Carbon monoxide (mg/m3) 9.0 22 1000
Sulphur dioxide (mg/m3) 328 568 2000
Oxides of nitrogen (mg/m3) 155 219 1000
Particulate matter load (mg/m3) 7.4 26 200
Thermal – La Baraque
Bagasse as Fuel Concentration @ 15% Oxygen
Min Max EPA 1998 Standards Carbon dioxide (%) 5.6 5.8 None
Carbon monoxide (mg/m3) 73 76 1000
Sulphur dioxide (mg/m3) 10 11 2000
Oxides of nitrogen (mg/m3) 142 163 1000
Particulate matter load (mg/m3) 55 390 400
Coal as Fuel Concentration @ 15% Oxygen
Min Max EPA 1998 Standards Carbon dioxide (%) 4.7 4.8 None
Carbon monoxide (mg/m3) 8 23 1000
Sulphur dioxide (mg/m3) 250 299 2000
Oxides of nitrogen (mg/m3) 192 212 1000
Particulate matter load (mg/m3) 7.5 12.4 200
Biodiversity Management
We are committed to the preservation and enhancement of biodiversity. Environmental impact assessments have concluded that our industrial operations at La Baraque and St Aubin are neither in nor adjacent to protected areas or areas of high biodiversity value. As far as the Mon Trésor Smart City project is concerned, ecologically sensitive or high biodiversity areas have been identified and appropriate measures will be taken to protect and enhance their value.
Emissions Management
Our power plants are equipped with Electrostatic Precipitators (ESPs) for flue gas treatment. Furthermore, ambient air quality monitoring and stack monitoring exercises at our power plants are carried out independently on a quarterly basis by the Air Pollution Monitoring Unit of the Mauritius Cane Industry Authority. Reports demonstrate that all parameters measured are compliant with the EPA 1998 Standards.
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NaturalCapital (cont’d)
05 / Key Capitals
Avoided CO2 Emissions
2018 2017 2016 Bagasse related electricity exported to national grid (MWh) 98,554 111,654 125,745 Avoided emissions from the burning of bagasse in tCO2e 100,229 113,552 127,883
Emission factor of bagasse = 0.775 kgCO2/kg (bagasse) = 1.017 tCO2/MWh (Source: 2006 IPCC Guidelines for National Greenhouse Gas Inventories)
Entity Volume of wastewater discharged, m3 (est) Destination
2018 2017 2016
Milling (Sugar Factory) clean water 3,678,032 2,989,319 2,292,679 Cane irrigation
Milling (Sugar Factory) effluent 38,178 59,371 107,130 Recirculated in the process
Milling (Refinery) effluent 12,722 157,522 98,645 Recirculated in the process during the crop season and sent to cane irrigation during the intercrop period
Thermal - La Baraque 508,609 487,923 415,076 Clarified through a decantation pond before reuse for cane irrigation
Thermal - St Aubin 289,707 299,213 294,542 Clarified through a decantation pond before canal disposal
Distillery 84,623 92,844 181,506 Recirculated in the sugar mill during the crop season. During the intercrop period, partly reused in distillery operations as well as for irrigation of cane fields
Holiday Inn Mon Trésor 14,187 12,893 10,506 Processed through a dedicated treatment plant and reused for irrigation of lawn
Effluent and Waste Management
The commitment for our waste management programme emerges from the Group Environmental Policy and the ‘zero waste’ approach, which places strong emphasis on the 3Rs (Reduce, Reuse and Recycle) principle. The table below shows the effluent generation and disposal in terms of volumes and destinations. It should be highlighted that the volume of water discharged from refinery operations decreased considerably by 92% due to process re-engineering. The volume of clean water discharged by La Baraque sugar factory increased by 23% due to a rise in storm water run-off as a result of heavy rainfall.
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GHG Emissions
In 2018, our 90 MW and 35 MW power plants emitted on average 1.25 tonnes of CO2/ MWh of electricity produced from coal, which represents a total of 782,471 tonnes of CO2 (2017: 900,431 tonnes) released. Also, our bioethanol distillery captured and delivered 3,082 tonnes of carbon dioxide to Gaz Carbonique Ltd for use in the beverages industry. However, with the implementation of our Carbon Burn-Out unit, we will avoid the emission of around 29,000 tonnes of carbon dioxide (through the avoided production and import of Portland cement). In addition, the use of bagasse as fuel, contributed to avoiding the emission of around 100,229 tonnes of CO2e in 2018, which helped us mitigate GHG emissions and reduce our impact on climate change.
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Environmental activity costs (Rs) 2018 2017 2016
Bonsucro membership & training 99,750 166,175 32,300
ISO 14001 audits 67,000 158,000 332,200
Environmental training (external) 15,000 30,000 287,780
Environmental monitoring 820,000 1,034,000 814,000
Collection and disposal of solid waste 194,050 225,150 224,350
Ash management-related expenses including transport 35,680,477 40,377,899 36,328,560
Effluent management 808,291 1,055,432 1,309,088
Other miscellaneous costs 219,373 325,910 164,300
Total 37,903,941 43,372,566 39,492,578
Solid Waste
The implementation of solid waste management practices within all Omnicane entities is under way. Recycling opportunities for paper waste, old batteries and green waste are also being provided across the Group. The Sustainability Department, in collaboration with Mission Verte, is conducting awareness sessions on reducing waste across Omnicane entities.
Environmental Impacts of Products and Services
Environmental Impact Assessments (EIAs) are carried out prior to any major undertaking being implemented and so far, all our major operations have successfully obtained an EIA licence from the Ministry of Environment. With respect to our Smart City development, two EIA reports have already been submitted to the relevant authorities and we hope to receive our EIA licences shortly. Quarterly environmental monitoring reports, containing environmental performance indicators and mitigation activities are regularly sent to the Ministry of Environment for follow-up as per the terms of the EIA and Industrial Waste Audit guidelines.
Environmental Compliance
The Group Environmental Policy strongly sets the commitment to abide by all local and international environmental laws and regulations relating to business operations. Furthermore, our two power plants at La Baraque and St Aubin are successfully certified according to ISO 14001:2015 Environmental Management System, which enables them to better track their environmental aspects including legislation. In 2018, the Company received no fines or sanctions related to non-compliance with applicable environmental laws and regulations.
Environmental Costs and Communication
Environmental protection has a cost associated with it, which must not be neglected when analysing costs of business operations. Usually, as per customary financial accounts, these environmental costs remain hidden within broad categories of operational overheads and expenses. Knowledge of these costs enables us to not only manage them but also to redesign the production process and reduce the pollutants being released into the environment in the future. We have strived to classify these costs into eight main categories, which pertain to our operations that have the highest environmental costs, i.e. thermal energy, bioethanol and milling operations. It should be noted that environment-related expenses represent around 0.9% of the total operating expenses for the Group in 2018.
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