Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China.
College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
Int J Environ Res Public Health. 2022 Sep 1;19(17):10940. doi: 10.3390/ijerph191710940.
The aerobic granulation, pollutant removal, and microbial community in real textile wastewater (TWW) treatment were compared using conventional activated sludge (CAS) and preformed aerobic granular sludge (AGS) in synthetic wastewater as seed in two reactors, reactor-1 (R1) and reactor-2 (R2), respectively. The results showed that complete granulation was achieved in R1 (sludge volume index at 5 min (SVI) and 30 min (SVI): 19.4 mL/g; granule size: 210 μm) within 65 days, while it only required 28 days in R2 (SVI and SVI: 27.3 mL/g; granule size: 496 μm). The removal of COD, NH-N and TN in R1 (49.8%, 98.8%, and 41.6%) and R2 (53.6%, 96.9%, and 40.8%) were comparable in 100% real TWW treatment, but stable performance was achieved much faster in R2. The real TWW had an inhibitory effect on heterotrophic bacteria activity, but it had no inhibition on ammonia-oxidizing bacteria activity. AGS with a larger particle size had a higher microbial tolerance to real TWW. Furthermore, filamentous in the AGS in R2 disappeared when treating real TWW, leading to the improvement of sludge settleability. Thus, seeding preformed AGS is suggested as a rapid start-up method for a robust AGS system in treating real TWW.
在两个反应器中，分别使用传统活性污泥（CAS）和预成型好氧颗粒污泥（AGS）作为接种污泥，比较了好氧颗粒化在实际纺织废水（TWW）处理中的污染物去除和微生物群落。结果表明，在 R1 中（污泥体积指数（SVI）在 5 分钟和 30 分钟时为 19.4 毫升/克；颗粒尺寸：210 微米）在 65 天内实现了完全颗粒化，而在 R2 中仅需 28 天（SVI 和 SVI：27.3 毫升/克；颗粒尺寸：496 微米）。在 100%实际 TWW 处理中，R1（COD、NH-N 和 TN 的去除率分别为 49.8%、98.8%和 41.6%）和 R2（COD、NH-N 和 TN 的去除率分别为 53.6%、96.9%和 40.8%）的去除率相当，但 R2 能更快地达到稳定性能。实际 TWW 对异养菌活性有抑制作用，但对氨氧化菌活性没有抑制作用。具有较大粒径的 AGS 具有更高的微生物对实际 TWW 的耐受性。此外，当处理实际 TWW 时，R2 中 AGS 的丝状菌消失，导致污泥沉降性能得到改善。因此，建议采用预成型 AGS 接种作为处理实际 TWW 的稳健 AGS 系统的快速启动方法。
