Environmental Measures

Air Pollutants

By controlling the source, including using less polluting fuels, improving the efficiency of desulphurisation and denitrification equipment in thermal power plants, using automatic spray heads to sprinkle water and reduce dust, and strengthening the management of company vehicles, the Group is committed to improving air pollution control efficiency and reducing air emissions.

Greenhouse Gases Emissions and Energy

We implement energy and emission reduction measures in each business segment, including using solar and energy-saving lamps at construction sites, carrying out energy-saving retrofits of equipment in prefabricated construction plants and thermal power plants, and promoting power-saving behaviours among employees.

In addition, we continue to commission a professional consultancy to quantify the greenhouse gases emissions annually, in order to evaluate the efficiency of current measures, and to further formulate energy saving and emissions reduction targets.

The Group understands that the carbon emissions of buildings are not limited to the construction phase, but also arise from the production of building materials, daily use, maintenance and repair, and the final dismantling process. Currently, the Group’s carbon assessment covers site operations and production processes from its prefabricated construction plants. In order to realise comprehensive and systematic assessment, the Group will gradually improve the data collection system. It plans to first expand the scope of assessment to the upstream of the supply chain, including building materials producers and processors, and raw material suppliers.

Water Resources

All water consumed by CSCI was sourced from municipal water supply or other public or private organisations. There was no problem in sourcing water. However, the Group is aware of the current and future water shortage around the world. Therefore, it has formulated water saving strategies and has installed water-saving facilities, such as the grey water reuse system in Huanggu Thermal Power, which can save about 50 tonnes of water per hour. During the heating season, it can save approximately 181,200 tonnes of water to improve the water efficiency of industrial production processes.

On the other hand, the Group’s operations inevitably produce domestic wastewater, construction wastewater and industrial wastewater. By setting up appropriate sewage treatment facilities, all wastewater has been treated and discharged according to local laws and regulations.

Waste

The Group promotes optimal design, process and material management to improve resource utilisation and reduce waste. The Group strictly follows the relevant local regulations to handle the hazardous and non-hazardous waste generated by construction and production processes, as well as the office operations. Non-hazardous waste such as construction and demolition (“C&D”) materials, waste concrete components from factory, coal ash and coal slag in thermal power plant are first sorted in the construction site or in the plant before waste collection, recycling or final disposal according to regulations. Hazardous wastes such as chemical waste, metal sludge in wastewater treatment facilities, and fluorescent tubes have been entrusted to qualified organisations for disposal.

Case Study

Upgrading desulphurisation system in Huanggu Thermal Power

In May 2018, the Shenyang Environmental Protection Bureau raised the standard for special restrictions on sulphur dioxide in flue gas emissions for coal fired power plant according to the latest Boiler Air Pollutant Emission Standards released by national authorities, and requested affected organisations to execute the new standards in November 2018. Huanggu Thermal Power inspected the desulphurisation equipment in the plant and found that five steam boilers fail to meet the new emission limits in the desulphurisation processes. Therefore, equipment upgrade plan was carried out in July 2018. After repeated demonstration of the design solution, Huanggu Thermal Power finally decided to upgrade the desulphurisation system by increasing the liquid to gas ratio. This includes increasing the spray density in the absorption tower and expanding the contact surface area between the liquid and gas, thereby improving the desulphurisation efficiency. After the upgrade, all steam boilers in the plant reached the new sulphur dioxide emission standards for flue gas to meet environmental requirements.

Waste Management at Construction Sites

In order to reduce the environmental hazards of construction sites, the Group requires the project-in-charge and contractors to submit a site management plan before project commencement, and strengthen the implementation and supervision of environmental protection measures during the construction. Waste management is an important component.

Construction waste is mainly non-hazardous C&D materials. Inert (including mud, sand, stone and concrete) and non-inert (including bamboo branches, wood, rubber and metal) C&D materials are separately placed at designated spots, and are regularly cleared and collected. During the year, in order to further strengthen the management of C&D materials, the Safety and Environmental Protection Department of CSCHK has formulated the Guidelines for the Management of Site Demolition Materials Disposal to regulate the disposal and monitoring of materials at all construction sites.

Types of waste Inert C&D materials Non-inert C&D materials
Disposal methods Sent to public fill reception facilities/ waste sorting facilities/for reuse at other authorised sites Sent to landfills/waste sorting facilities
Monitoring measures

The construction site assigns a personnel to monitor the use of valid chits or construction waste disposal trip-ticket, and issue and register the information of each note, including number, date, time, material disposal point, vehicle license plates, etc. Records are checked every week to ensure that the materials have been transferred to the registrated sites for disposal in accordance with laws and regulations.

At the same time, all construction sites must arrange document registration, photographing and CCTV system at the vehicle exit to record the actual disposal, and ensure that the materials have been properly covered, and the body and wheels of the vehicles have been washed to avoid environmental impact caused during transportation.

If the sub-contractor intends to transport inert C&D materials to private locations for disposal for special reasons, the construction site will further strengthen supervision to prevent illegal dumping. The monitoring process includes:

Document submission
  • Request the sub-contractor to present documents confirmed by the EPD, detailed information of the fleet responsible for materials transport, and the expected total amount and time of the materials to be disposed of.
Review and confirmation
  • The supervisors will conduct onthe-spot investigations and take photographs of the private land to be used for disposal to ensure that the site has been confirmed by the EPD, and measures such as fencing have been carried out to define the dumping area;
  • Review the information submitted by the sub-contractor with the forms confirmed by the EPD to ensure consistency.
Disposal monitoring
  • Disposal must be scheduled within the registered time. Only preregistered vehicles will be allowed to pass;
  • Require the driver to take a photo of the dumping site after each disposal and send it immediately to the site supervisor;
  • The construction site carries out random inspections of vehicles at least once a month by tracking and recording the entire process from collection to dumping.

In addition, the Group encourages the promotion of circular economy, so it values waste recycling. For example, measures include making concrete blocks with waste concrete for use at the construction sites, internal allocation of old steel for reuse at other sites, and recycling of expired helmets, etc., to improve resource utilisation, thereby achieving the goal of energy saving, carbon reduction and green construction.

Promote Green Building

In recent years, the government has actively promoted green buildings. With the Group’s positive response, during the year, more than 30% of the projects under construction in Hong Kong are undergoing certification by the Hong Kong Green Building Council (BEAM Plus), while the Group also increased the proportion of green building certification in its portfolio in the Mainland China.

Take Chengdu Medical City Tri-medical Innovation Centre (Phase III) project, which attained two-star standard for green buildings, as an example, the Group seeks to achieve the goal of achieving harmony between people and architecture, nature, and sustainable development. At the planning stage, the Group has enhanced the building energy efficiency, unconventional water use and proportion of recyclable construction material use in architecture, structure, water supply and drainage, HVAC, and electrical power and equipment according to the two-star Green Building Label.

Architecture

Design feature

  • The area of shading meets the Design Standard for Energy Efficiency of Public Buildings; the airtightness and openable area of exterior windows and curtain walls meet the requirements on heat preservation, energy saving and ventilation; and environmentally friendly and sustainable green building materials are used.
Structure

Design feature

  • Use of high-strength and high-performance concrete, and lightweight aggregate concrete to optimise the connection of steel bars and save steel consumption
Water supply and drainage

Design feature

  • Operate watersaving system, set up sewage treatment station, collect and reuse rainwater and grey water; adopt environmentally friendly, hygienic and green water-saving products in sanitary equipment
HVAC

Design feature

  • Centralise heating and air conditioning system, optimise design of winter’s heating load and summer’s cooling load in rooms, adopt centralised control and decentralised adjustment to reduce equipment load; adopt energy-saving equipment to reduce energy consumption
Electrical power and equipment

Design feature

  • Adopt energy-saving lamps and equipment; innovatively use the unmanned park system to reduce manpower and improve work efficiency

During the construction, in order to reduce the negative impact and pollution on the surrounding environment, and to achieve the purpose of green construction, the Group stipulates guidelines on environmental protection and resource use with regard to construction, and requires the construction workers to comply.

Environmental protection
  • Sort construction waste and reasonable utilisation rate should reach 30%
  • Set up noise monitoring points to monitor and control noise in real time
  • Reduce dust in construction sites with measures such as temporary greening, dust-proof cloth and mist blower
Use of materials
  • Adhere to the limit of material allocation and waste recycling to reduce resource wastage
  • Procure environmentally friendly materials
  • Waste packaging recycling rate should reach 100%
  • Optimise reinforcement steel bar solutions to reduce scrap yield and reduce loss
Use of water resources
  • Set water consumption quotas
  • Adopt water-saving appliances
Energy use
  • The proportion of energy-saving lighting fixtures should be greater than 80%
  • Adopt variable frequency power supply system in large-scale mechanical equipment to reduce energy consumption
  • Install power limiters in the workers’ dormitory area to prohibit the use of highpower appliances, reduce power consumption and ensure safe use of electricity
  • Adhere to the principle of giving priority to nearby material sources. Building materials produced within 50 km from the construction site should account for 70% or more of the total weight of construction materials used%以上
Use of land resources
  • Fully understand the geological conditions of the construction site and the distribution of infrastructure pipelines before construction, and formulate corresponding land protection measures
  • Optimise the general layout plan and make reasonable use of the land
Paperless Office

To create a paperless work environment, the Group adopts the ‘Gong Zuo Bao’ system for internal communication. The application of electronic platforms and tools facilitates information flow, document transfer and long-distance meetings, and improves the communication efficiency of all departments.

Features of ‘Gong Zuo Bao’

Information portal

Store personnel data with a clear organisation relationship. The platform is convenient for accessing various business systems to realise mobile office.

Full media conference

Combine the intelligent conference flat-panel TV and the conference system software developed by the Group to realise the integration of text, data and video, and improve the communication efficiency of multi-party conferences.

Instantaneous communication

Meet the needs of singlechat and group chat, facilitate the transmission of text, pictures, expressions and other forms of content, and synchronise multi-terminal content to avoid missing information.

Data collaboration

Collaboration functions such as file sharing, group voting, electronic whiteboard and desktop sharing to facilitate work discussion.

In addition, to effectively control and manage inventory costs and improve the efficiency of document issuance, the Group fully adopts the Check Easy and the Sign Easy systems to conduct fixed assets check and document transfer electronically. Through these systems, each asset and document is accompanied by a RFID code or a two-dimensional code for remote tracking and automatic recording, avoiding the mistake of traditional manual counting or delivery. In addition, the electronic process saves the cost of paper purchase and improves work efficiency, while contributing to environmental protection and global carbon reduction at the same time.

Treatment and Reuse of Production Wastewater

The Group is well aware of the importance of water resources. Apart from the water-saving measures implemented in construction sites, factories and offices, it focuses on the reduction and treatment of wastewater, and promotes the recycling of production wastewater in the production of prefabricated parts. In the process of wastewater treatment, Shenzhen Hailong promotes the use of the new integrated wastewater treatment facility. Compared with conventional large-scale equipment, the new equipment is easy to operate and manage, small in size and with small scale of sewage pipe network, making it convenient for installation and operation and alleviating the burden on pipeline construction.

Production wastewater from the plant is discharged into the wastewater treatment facility. After stirring in the retention tank and undergoing treatment in the reaction tank, it enters the sedimentation tank where the liquid and the sludge are separated. After dehydration by the filter press, the sludge is bagged and stored in a designated position, and collected by third party organisation regularly. The treated wastewater enters the reuse tank for reuse in production. The total amount of wastewater reused by Shenzhen Hailong this year was 4,018 cubic metres, which could achieve zero wastewater discharge in general to realise the aim of reducing use of water resources.

Application of Energy Saving Technology in Thermal Power Plant

Faced with the growing greenhouse effect and climate change, energy conservation and carbon reduction have become an important issue for all industries. Huanggu Thermal Power understands that, as a global citizen, greenhouse gas emissions reduction is one of its important responsibilities. Huanggu Thermal Power has long studied energy-saving technologies and completed the transformation of production equipment in stages. For example, in 1997, the generator was transformed for recycled water heating, so that it can be used to provide heating with the remaining heat of the recycled water during the heating season. The generator is still in use today, and provided 33.89 GJ of heating this year. Huanggu Thermal Power installed a fixed and combined heat condensation unit in 2004, and a lithium bromide absorption heat pump in 2014. The retrofitting measures increased the system’s waste heat recovery, which resulted in the recovery of heat of 17.52 GJ in Huanggu Thermal Power.

Entering 2018, Huanggu Thermal Plant continued to assess the energy consumption of the facilities and designed the transformations below to effectively save energy and reduce the carbon emissions in the production.

Desulphurisation sealed fan inlet pipeline transformation

The original pipeline outlet is located outdoors so that heater is needed when the outdoor temperature is too low. After the redesign, the entrance will be moved inside the plant to eliminate the need for heater, saving about 254,000 kWh of electricity.

Energy-saving transformer replacement

Through the verification of the transformer’s electrical parameters, load and loss due to empty-load, the plant replaced eight high-energy consumption transformers with new energy-saving transformers, which can save about 47,000 kWh of electricity each year.

Air compressor outlet pipe redesign

The process design of the old air compressor tends to cause frequent unloading of the new air compressor unit. The production department calculated the gas production, gas supply and gas consumption, expanded the connecting pipe diameter, and reduced the use of air compressor. This can save about 437,000 kWh of electricity each year.