MEIHui-rui,WANGChi,FUXian-song,et al.An Engineering Example of Aerobic Granular Sludge Technology for Treating Industrial Wastewater[J].China Water & Wastewater,2024,40(4):84-88.
An Engineering Example of Aerobic Granular Sludge Technology for Treating Industrial Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第4期
Page:
84-88
Column:
Date of publication:
2024-02-17
- Keywords:
- aerobic granular sludge technology; industrial wastewater; simultaneous nitrogen and phosphorus removal; high efficiency and energy-saving
- Abstract:
- The design scale of a new wastewater treatment plant in an industrial park in Zhejiang Province is 2×104 m3/d. The main process consisting of biological tank (aerobic granular sludge technology based on SBR), high-efficiency clarifier and denitrification deep-bed filter was designed because of the shortage of land and the stricter effluent discharge standards. Compared with the activated sludge process used in the original wastewater treatment plant (the phase Ⅰ and Ⅱ adopted CASS and A2O process respectively), the process saved approximately 40% of the footprint area and reduced the operating cost by more than 30%. During the start-up and commissioning period, the influent COD, ammonia nitrogen, total nitrogen and total phosphorus fluctuated in the ranges of 360-660 mg/L, 20-42 mg/L, 35-55 mg/L and 1.65-3.66 mg/L respectively, while the effluent COD, ammonia nitrogen, total nitrogen and total phosphorus remained below 38 mg/L, 1.9 mg/L, 10.5 mg/L and 0.3 mg/L respectively, which met the limits specified in Discharge Standard for Major Water Pollutants for Municipal Wastewater Treatment Plant (DB 33/2169-2018) of Zhejiang Province. In the later period, the particle size of the cultured granular sludge reached 1.4 mm or more, the sludge volume index (SVI) remained below 30 mL/g, and the mixed liquid suspended solid concentration (MLSS) increased from 4.28 g/L to 10.64 g/L. This project has become the first successful case of large-scale aerobic granular sludge process in China, and has guiding significance for the application of aerobic granular sludge technology.
Last Update:
2024-02-17