TANGZhang-cheng,YANGKun,JIAJian-wei,et al.Intensive Design of the Phase Ⅱ Project of a Sewage Treatment Plant in Guangdong[J].China Water & Wastewater,2024,40(2):60-64.
Intensive Design of the Phase Ⅱ Project of a Sewage Treatment Plant in Guangdong
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第2期
Page:
60-64
Column:
Date of publication:
2024-01-17
- Keywords:
- intensive design; sewage treatment; multi-mode; precise aeration
- Abstract:
- The design scale of the phase Ⅱ project of a sewage treatment plant in Guangdong is 10×104 m3/d. The process consists of pretreatment, five-stage Bardenpho bioreactor, rectangular secondary sedimentation tank with peripheral inflow and outflow, high efficiency settling tank and precision filter. The effluent quality is required to meet first level A limit specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) and the stricter value of first level limit in the second period specified in Discharge Limits of Water Pollutants （DB 44/26-2001）. The water content of sludge is reduced to 60% after treated by the process of mechanical thickening, chemical conditioning, and high pressure plate and frame dehydration, and then it is transported outside for disposal. The actual operation shows that the effluent quality meets the design discharge standards completely. The design reduces the footprint area by reasonable selection of the treatment technology, optimization of the single structure design and intensive and compact layout of the structures. The submersible water impeller and aeration disk are equipped simultaneously in the second-stage anoxic tank to realize the switching between AAOAO and A2O biological treatment modes, and flexibly cope with water quality fluctuations. The energy saving and consumption reduction is achieved by setting a precise aeration system to adjust and distribute aeration rate according to the need.
Last Update:
2024-01-17