Environmental Sanitation Engineering ›› 2026, Vol. 34 ›› Issue (3): 98-104,111.doi: 10.19841/j.cnki.hjwsgc.2026.03.012

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Engineering Practice of Kitchen Waste Wet Catalytic Oxidation Solution as Carbon Source in Wastewater Treatment Plants

WANG Pengcheng, HUANG Anna, PANG Kalong, SUN Lili, CHEN Bin, JIANG Wuying   

  1. 1. Ningbo Kaicheng Ecological Technology Co. Ltd.； 2. Ningbo City Appearance and Environmental Sanitation Guidance Center
  • Online:2026-06-30 Published:2026-06-30

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Abstract: ased on a sewage treatment plant in Ningbo with a processing capacity of 1.0×105 m3/d, this study evaluated the technical feasibility and economic benefits of using the oxidation liquid produced from the wet oxidation of kitchen waste as an additional carbon source through engineering practice. The experiment was conducted in stages, gradually increasing the dosage of the oxidation liquid from 10 m3/d to 30 m3/d, replacing part of the sodium acetate added to the denitrification tank of the A/O system, to investigate its impact on the system treatment effect and the carbon sources cost. Results showed that effluent COD and TN consistently met discharge standards before and after dosing oxidation liquid, with no increased risk of pollutant release. When the oxidation liquid dosage reached to 30 m3/d, the COD removal rate increased by approximately 3.63 percentage points compared to the period without oxidation liquid. TN removal also improved during all dosing phases. Economic analysis revealed that the cost of carbon source saved by adding oxidation liquid during the actual operation period in 2024 was 127.88 yuan per cubic meter. This study provided a practical technical pathway for the resource utilization of organic waste and the cost reduction and efficiency improvement of wastewater treatment plants.

Key words: 　wet oxidation, kitchen waste, wastewater treatment, carbon source

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