TThe Company produces urea, methanol and POM with natural gas and coal as raw materials, and produces ammonium phosphate (MAP and DAP) and compound fertilisers using phosphate ores, sulphur and ammonia as raw materials, which mainly give off exhaust gases such as CO₂, SO₂ and NO_X, Chemical Oxygen Demand of industrial wastewater (COD), and solid waste such as coal ashes, as well as hazardous solid waste including catalysts and radioactive materials (cobalt and cesium) arised after production. The Company strictly abides by the relevant environmental protection laws of the PRC and endeavours to ensure clean production. We are actively engaged in pollution prevention and treatment to minimise the impact on the environment. In 2019, the Company’s total greenhouse gas emissions were 6,445,400 tonnes. Among these, 6,442,900 tonnes (statistical figure not verified by any third party) of CO₂ were emitted, with an emission density of 0.79 (aggregate of all products), methane and nitrous oxide emissions amounted to 2,500 tonnes in total. 1,019.39 tonnes of SO₂, 1,296.40 tonnes of NO_X and 207.03 tonnes of COD were emitted.

   

Management of exhaust gas and reduction of greenhouse gases

The Company strictly complies with applicable laws and regulations including Atmospheric Pollution Prevention and Control Law of the PRC, Integrated Emission Standard of Air Pollutants as well as Emission Standards of Air Pollutants for Thermal Power Plants. All our production plants fulfill the emission standards imposed by the government in respect of SO₂ and NO_X emission. In 2019, the Company completed the manufacturing of key equipment of Fudao Phase I combustion turbine renovation project to make the NOX exhaust gas emission of auxiliary furnaces meet the newest national standards, and the dust deep treatment project of CNOOC Tianye’s urea tower, which adopted dry membrane separation and low-temperature water washing techniques to remove dust and ammonia in the exhaust gas of the granulating tower.

The Company pushed forward the greenhouse gas emission reduction work and actively constrcuted the emission management strategy. The company actively carried out the verification of historical carbon emissions data and completed the third party verification of carbon emissions in 2018.  Listed among the second batch of enterprises admitted to carbon trading and discharge management scheme in Hubei, DYK Chemical has fulfilled the carbon emission contract for three consecutive years after completing the contract in. A volume of 22,933 tonnes was transacted during the year. In 2019, CNOOC Fudao completed the development plan of carbon dioxide recovery and utilisation project, which paved the way for the Company to distribute surplus carbon dioxide. In 2019, 222.46 tonnes of dry ice and 5,334.44 tonnes of liquid carbon dioxide were produced and sold, thereby reducing the emission of greenhouse gases. As prescribed under the Guidelines for Accounting and Reporting Greenhouse Gas Emissions for China Chemical Production Enterprises (Trial), our total carbon emission amounted to 6,442,900 tonnes (statistical figure not verified by any third party) in 2019, Among these, 3,339,500 tonnes were emitted from Hainan area, accounting for 51.83% of the total, followed by CNOOC Huahe 24.09%, CNOOC Tianye 22.18% and DYK Chemical 1.89%.

   

Wastewater management

In compliance with the Discharge Standard of Water Pollutants for Ammonia Industry, Emission Standard of Pollutants for Petroleum Chemistry Industry and Emission Standard of Pollutants for Petroleum Refining Industry, the Company conducts stringent treatments on its industrial and domestic sewage to ensure compliant discharge and raise the rate of reuse for wastewater, which reduced wastewater emission.

In 2019, the Company pushed ahead with the sewage renovation project to comply with discharge standards. The wastewater treatment project of CNOOC Tianye POM Plant progressed smoothly, and the civil works of POM Line A/C was completed in October. At present, anaerobic tank and aerobic tank are adding sludge to debug. In December, CNOOC Tianye started the outer drainage upgrading and reconstruction project, which has entered the public bidding stage at present. In 2019, the Company discharged an aggregate of 207.03 tonnes of COD and 7.78 tonnes of NH₃-N.

   

Disposal of solid waste

The Company attaches great importance to the generation and disposal of hazardous and non-hazardous wastes and complies strictly with the requirements under Standards for Pollution Control on the Storage and Disposal Site for General Industrial Solid Wastes, Standard for Pollution Control on Hazardous Waste Storage, among others. The piling and storage of tailings from phosphate ores, phosphogypsum and coal ashes were in conformity to the requirements of environmental safety of the government. In 2019, CNOOC Huahe completed the ash treatment project, in which abandoned sand pits were refilled with ashes compacted in layers, and Populus alba trees which have high survival rate and strong in soil were planted on the upper soil layer to make a green landscape. CNOOC Fudao improved its anti-seepage standards, clearly stated and  labelled the materials stored in its hazardous waste temporary storage facility. The Company disposed of 40,000 tonnes of solid waste by means of resource reuse (phosphogypsum slag yard for dam building) and 1,706,000 tonnes of solid waste by piling and reclamation. Organisations with national environmental protection qualifications were engaged to handle 55,554.98 tonnes of hazardous waste in a professional manner. As such, a safe treatment rate of 100% was achieved.