In November 2023, Purac won the bid for Beijing Changping Organic Waste Ecological Treatment Station upgrading and reconstruction project of Beijing Environmental Sanitation Group, providing the hydraulic pulping pretreatment system and anaerobic treatment system.

The project is located in Asuwei Circular Economy Park, Changping District, Beijing, with a total capacity of 300 tons restaurant food waste per day, and adopts the process of "pretreatment (handle restaurant food waste and household kitchen waste) + wet anaerobic + biogas utilization". Changping organic waste ecological treatment station upgrading and reconstruction project is another representative pretreatment case of Purac besides of Chongqing Heishizi, Suzhou Industrial Park Restaurant Food Waste EPC, Beijing Nangong, Beijing Dongcun, Beijing Fengtai and other projects. Hydraulic pulping pretreatment process began to be applied to European organic waste treatment projects in the 80s of last century, in 2008 Purac introduced this process into China for Qingdao Jiaonan municipal waste treatment project, after years of upgrading and optimization, HP hydraulic pulping process can be widely used in the pretreatment of organic waste such as restaurant food waste, household kitchen waste, sewage sludge, etc.

The anaerobic system adopts one set of steel anaerobic reactor with volume of 13,000 cubic meters, and the Mesophilic anaerobic design can be compatible with thermophilic anaerobic operating conditions, and the biogas is designed for power generation for plant self-use, the surplus electricity is connected to the grid, the biogas residue is dehydrated and transported outside for final disposal, and the waste water enters into the following water treatment system. The completion of the upgrading project will further ensure food hygiene and safety, enhance the city's image and public satisfaction, and ensure the resource recycling of restaurant food waste and household kitchen waste treatment.

67 years of adherence to the craftsman spirit helps Purac create large numbers of classic case, and so far the total domestic organic waste treatment capacity is more than 34,000 tons/day, which makes the top in the industry. Purac will continue to adhere to the design concept of optimal quality and cost throughout the life cycle of the project, provide customers with customized solutions, and help the green and sustainable development of environmental protection.