ENVIRONMENTAL, SOCIAL AND GOVERNANCE REPORT (CONTINUED)
3. ENVIRONMENTAL STEWARDSHIP (Continued)
b.
Water Preservation (Continued)
Case Study
Rainwater Harvesters
Given Hong Kong's abundant rainfall, on-site rainwater catchment systems have been of particular interest as a water conservation measure in recent years.
To contribute to water conservation, The Hong Kong Shipyard Limited installed an on-site 1 cubic metre- sized rainwater harvesting tank this year. Instead of a metallic tank that can be easily corroded under harsh outdoor conditions, a more durable plastic tank is installed to enhance system lifespan. The installation has the capacity to collect a total of 30 cubic metres of rainwater annually.
The collected rainwater is used for company car washing, floor cleaning and green area irrigation. "Technical Specifications on Grey Water Reuse and Rainwater Harvesting" published by the Water Supplies Department have provided clear guidance in ensuring the effluent is fit for purpose and poses no undue health risks.
Besides contributing to our environmental stewardship, the maintenance costs of the fresh water supply system have been reduced as well.
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C.
Environmental Mitigation
Each of our subsidiaries have developed individual initiatives to mitigate their environmental impacts, according to the nature of their operations. Waste management has been a key concern applicable to all of our subsidiaries.
Shipyards generate different types of waste such as oil, scrap metals, and sacrificial anodes from our vessels. At The Hong Kong Shipyard Limited, the used oil is converted into high-quality green lubricants increasing its monetary value, while the scrap metals and used sacrificial anodes do not require significant processing. Designated contractors have been appointed to classify the different types of metals by weight and the sacrificial anodes by size and number, and their sales can contribute to revenue gains.
On-board the floating restaurants of Harbour Cruise Bauhinia, waste water management has become a significant channel for our subsidiary to minimise pollution. Our subsidiary handles the sewage generated on-board under a strict management system. An annual total of 8,950 metric tonnes of wastewater is securely discharged into an onshore sewage system at the ferry pier without leaching into the sea.
Hong Kong Ferry (Holdings) Company Limited
46
Annual Report 2016