停留时间对ABR污泥水解酸化系统影响研究

Influence of Retention Time on ABR Anaerobic Sludge Hydrolysis Acidification Process

以城市污水处理厂初沉污泥为研究对象,采用折流板反应器研究利用初沉污泥水解酸化产生碳源的可行性及其工艺特性.在温度为30℃,水力停留时间为24 h,污泥停留时间为3 d的条件下,经过30 d的试验运行,系统具备稳定产酸效果.酸化液的ρ(SCOD)和ρ(VFAs)极值分别达到1 182 mg/L和602.8 mg/L.试验表明,停留时间对系统酸化液碳源积累有重要影响,同等条件下增大水力停留时间可增加碳源的积累;而HRT大于32 h后,碳源数量增速减缓.固体停留时间在5 d时效果最佳,ρ(SCOD)、ρ(VFA)分别可达1 498 mg/L和895.3 mg/L;SRT增大到7 d时,产酸效果下降.

The primary sludge is operated by ABR anaerobic hydrolysis acidification process to generate carbon resource. The reactor provides stabile acidogenic performance under the conditions of 35 ℃ , HRT = 28 h, and SRT =3 d during 30 days. p（SCOD） and p（VFAs） of effluents reach the peak values at 1 182 mg/L and 602.8 mg/L during the operating time. Result shows that the sludge hydrolytic acidification system can successfully achieve the accumulation of VFAs. Retention time has significant impacts on the carbon accumulation system. Under the same conditions, the increase of HRT can improve the accumulation of carbon, however, when HRT is more than 32 h, the carbon resource accumulation slows down. When SRT is 5 d, p（SCOD） and p（VFA） are up to 1 498 mg/L and 895.3 mg/L; When the SRT increases to 7 d, the acidogenic performance decreases.