Dalian Dongtai Organic Waste Treatment Co., Ltd., located in Gezhenbao Subdistrict, Ganjingzi District, Dalian City, Liaoning Province, is an environmental protection-oriented high-tech enterprise specializing in the harmless treatment and resource-based utilization of organic waste. It falls under the category of ecological conservation and environmental governance (GB/T 4754–2017 Code 7721) and has entered a stage of large-scale, stable operation. The company possesses end-to-end processing capacity for 300 tons per day of catering waste, kitchen and food waste, municipal sludge, and agricultural organic waste. Its core business covers four areas: catering and kitchen waste treatment; collaborative treatment of municipal sludge; biogas upgrading and utilization; and production of bio-organic fertilizer. Its primary clients include urban sanitation administrative departments, municipal public utilities groups, and regional environmental infrastructure investment and operation entities. Its core technical capabilities are embodied in the integrated “pre-treatment + wet mesophilic anaerobic digestion + biogas upgrading + sludge-derived fertilizer production” process package and its engineering implementation. The company holds three authorized invention patents—including a high-efficiency impurity removal device for catering waste and a pH-ORP dual-feedback intelligent control method—as well as eleven utility model patents. Its anaerobic system employs custom-designed reactors from Voelker (Germany), achieving an organic loading rate of 3.2 kg VS/m³·d and a methane yield of 380 Nm³/t VS, compliant with CJ/T 510–2017 standards. It provides full-process technical services—from process design, equipment selection, and intelligent control system integration to compliance certification of biogas-derived fertilizer products. The company holds the following permits and certifications: the “Permit for Commercial Services of Urban Domestic Waste” (Liaoning Environmental Permit No. [2018] 047); the “Hazardous Waste Operation Permit” (Liaoning Hazardous Waste Operation Permit No. 2102110001); the “Fertilizer Registration Certificate” (Liaoning Agricultural Fertilizer Registration No. [2022] Approval No. 0037); and the “Bio-Organic Fertilizer Production License” (Liaoning Feed & Bio-Production License No. 21020001). It is certified under ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. Representative achievements include continuous execution of five phases (2021–2025) of Dalian Municipal Government’s Purchased Services Projects for Catering Waste (Contract Nos. DLZFCG-2021-089, etc.), accounting for 63.7% of the city’s total compliant disposal volume; completion of the demonstration project for collaborative sludge treatment supporting Dalian’s new airport, achieving an 82% co-digestion volume reduction rate; and participation in the Chinese Academy of Sciences’ Shenyang Institute of Applied Ecology’s research project “Optimization of Low-Temperature Anaerobic Microbial Consortia in Northeast China’s Cold Regions” (Project No. SY2024ECO-017), enabling stable winter-operation performance.