HAO Gui-zhen,FAN Yu-cheng,XU Li,et al.Enhanced Granulation of Aerobic Granular Sludge at Low Temperature[J].China Water & Wastewater,2020,36(19 19):32-38.
Enhanced Granulation of Aerobic Granular Sludge at Low Temperature
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
19 19
Page:
32-38
Column:
Date of publication:
2020-10-01
- Keywords:
- aerobic granular sludge; enhanced granulation; low temperature; SBR
- Abstract:
- Enhanced effect of adding artificial core ［Fe(OH)3］ and coagulant［poly aluminum cloride (PAC)］ on formation of aerobic granular sludge was investigated to realize rapid aerobic granulation at low temperatures. By feeding artificial simulated wastewater and inoculating with flocculent activated sludge, rapid cultivation of aerobic granular sludge and the removal of pollutants from the wastewater were achieved by adding coagulant and artificial core at low water temperature in a SBR, respectively. When water temperature was gradually reduced from 18 ℃ to （10±1） ℃ and kept at low temperature for a long period, the formation time of aerobic granular sludge could be effectively shortened by the two different enhanced methods. Performance of adding artificial core group was superior to that of coagulant group in terms of sludge concentration (10.22 g/L, 8.6 g/L), time-consuming to complete granulation (24 d, 32 d), average particle size of granular sludge (1.75 mm, 1.2 mm), pollutants removal efficiency, impact load resistance and other aspects. Aerobic granulation time of enhanced measure of adding artificial Fe(OH)3 colloid was reduced by 8 days at low temperature compared with that of adding coagulant.
Last Update:
2020-10-01