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Letters to the Editor, August 16, 2013

We refer to the letters by Charlie Chan ("Come clean on waste disposal strategy", August 13) and Frank Lee ("Viable waste management plan snubbed", August 5), regarding the proposal by Green Island Cement (Holdings) to develop a waste incineration facility in Tuen Mun.

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We refer to the letters by Charlie Chan ("Come clean on waste disposal strategy", August 13) and Frank Lee ("Viable waste management plan snubbed", August 5), regarding the proposal by Green Island Cement (Holdings) to develop a waste incineration facility in Tuen Mun.

Since the early 2000s, this firm has asked the government to adopt eco-co-combustion technology and develop a facility at its cement plant to treat 4,800 tonnes of municipal solid waste (MSW) each day. The Environmental Protection Department reviewed the technology and findings and made its conclusions known to the Advisory Council on the Environment (ACE) and the Legislative Council (relevant papers are available online). This technology has not been used for MSW treatment anywhere in the world for large tonnages.

Although the company had conducted a trial at a scale of several tonnes per day for about two months in 2005, it did not cover all the eco-co-combustion process. Also, potential market risk associated with the demand for cement will affect its reliability as a means of waste treatment.

The recommendation not to adopt this technology for the Integrated Waste Management Facilities Phase 1 was endorsed by the ACE in December 2009.

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Since there are a number of existing emission sources in the vicinity of the cement plant and it is not far from the population clusters in Tuen Mun, the company should first conduct a thorough environmental impact assessment study to address concerns about the cumulative air quality impact of the proposal if it is to be considered further. This has not been done. Green Island Cement would also need to address the land-use issue and public acceptability of its proposal.

We have told the firm that if it is serious about this project, it must first deal with technical feasibility and reliability, environmental acceptability and planning issues. At this stage, it is premature to state that the company's proposal is a viable solution readily available to assist in alleviating Hong Kong's pressing MSW problem.

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