ZHANGFang-fang,LIHong-yan,XIEHong-wei,et al.Whole Process of Duck Breeding Wastewater Treatment and Resource Recovery in Bench-scale Test[J].China Water & Wastewater,2023,39(9):91-96.
Whole Process of Duck Breeding Wastewater Treatment and Resource Recovery in Bench-scale Test
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第9期
Page:
91-96
Column:
Date of publication:
2023-05-01
- Keywords:
- duck breeding wastewater; whole process; Fenton oxidation; bio?degradability; resource recovery
- Abstract:
- The average concentrations of SCOD, ammonia nitrogen and total phosphorus in the wastewater from a duck farm in Shandong Province were about 60 000 mg/L, 4 000 mg/L and 1 300 mg/L. The bio-degradability of the wastewater was poor because of low B/C ratio (0.134), and it was difficult to be treated with conventional biological processes. According to the characteristics of the wastewater, the combined process of coagulation-precipitation, Fenton oxidation, stripping, CSTR and two-stage SBR was employed to treat the wastewater. In addition, the ammonia nitrogen and biogas generated in the treatment process were recovered. Under the optimal operating conditions, the average SCOD, ammonia nitrogen, total phosphorus and BOD5 in the effluent from the combined process were 353 mg/L, 28 mg/L, 6 mg/L and 83 mg/L, respectively, which all met the limits specified in the Discharge Standard of Pollutants for Livestock and Poultry Breeding (GB 18596-2001). The recovery rate of ammonia nitrogen reached 95.8%, and the biogas produced in the anaerobic process could be recovered, in which the content of CH4 was 58.9%.
Last Update:
2023-05-01