The residue hydrodesulfurization unit, with an annual processing capacity of 2 million tons, represents Maoming Petrochemical's largest investment in its refining system. In October and November this year, during full production operations, the unit only consumed 14 tons of fresh water per month—less than the daily water usage of a single household. This level of water efficiency is far below the previous 5% target before implementing water-saving measures, placing it among the most efficient units domestically.
Strengthening both management improvements and technological innovation has been key to achieving significant water savings and emission reductions in the Maoming Refining Division. In 2005, the facility used 1.24 tons of fresh water per ton of crude oil processed. By January to October this year, that figure dropped to 0.62 tons. With 10.85 million tons of crude oil processed in the same period, the total fresh water saved exceeded 8 million tons, and wastewater emissions were reduced by over 5 million tons—equivalent to the volume of a medium-sized reservoir.
In the past, due to inadequate water resource management and inefficient practices, the company’s fresh water consumption per ton of oil reached as high as 1.29 tons. This was not only far above the international standard of 0.5 tons but also higher than Sinopec’s average of 1.02 tons. Such inefficiency led to wasted resources and increased operational costs. To address this, the refining division launched a comprehensive water conservation initiative, aiming to reduce fresh water use per ton of crude oil to 0.6 tons.
To achieve this goal, three key strategies were implemented: meticulous water management, identification and repair of leaks, and the adoption of technical upgrades to enhance water efficiency. These efforts have significantly improved sustainability and set a strong example for other facilities within the industry.
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