Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
home > search

Now showing items 1 - 4 of 4

  • Storage of aerobic granular sludge embedded in agar and its reactivation by real wastewater

    Cheng, Yuanyuan   Xuan, Xinpeng   Zhang, Linan   Zhao, Jue   Long, Bei  

    Aerobic granular sludge (AGS) was preserved using an agar embedding method to maintain its stability. No obvious damage was imposed on the granular appearance during 30 days of cold and dry storage, but the granular microstructure had an uneven surface with a large number of holes. The results were consistent with the extinction of microbial communities and the monitored consumption of extracellular polymeric substances, in which granular specific oxygen utilization rate and mixed liquor volatile suspended solids/mixed liquor suspended solids ratio, respectively, decreased by 72.4% and 62.5% during storage. A mass conversation calculation indicated that the loss of granular mass was 1.6393 g. An offensive odour was smelled during storage, and the results indicated that a material transformation and mitigation were involved between AGS and the gas phase. Although the granular structure was destroyed to a certain extent, no obvious damage was imposed on the granular skeleton during storage. After it was aerated again after a feeding with real wastewater, the residual skeleton served as a carrier for the rapid proliferation of microorganisms, and good granular properties were obtained after 11 days of reactivation.
    Download Collect
  • Storage of aerobic granular sludge embedded in agar and its reactivation by real wastewater

    Cheng, Yuanyuan   Xuan, Xinpeng   Zhang, Linan   Zhao, Jue   Long, Bei  

    Download Collect
  • Stability of aerobic granular sludge in a pilot scale sequencing batch reactor enhanced by granular particle size control

    Long, Bei   Xuan, Xinpeng   Yang, Changzhu   Zhang, Linan   Cheng, Yuanyuan   Wang, Jianqi  

    Download Collect
  • Stability of aerobic granular sludge in a pilot scale sequencing batch reactor enhanced by granular particle size control.

    Long, Bei   Xuan, Xinpeng   Yang, Changzhu   Zhang, Linan   Cheng, Yuanyuan   Wang, Jianqi  

    Aerobic granulation was successfully achieved in a pilot scale sequencing batch reactor within 40 days. Then, stability of different particle size granules was explored according to their activity and resistance to ultrasonic crushing. Different particle size granules (0.3-0.6=E2=80=AFmm, 0.6-1=E2=80=AFmm, 1-1.43=E2=80=AFmm, 1.43-2=E2=80=AFmm, 2-3=E2=80=AFmm and 3-4=E2=80=AFmm) were exposed under different ultrasonic power separately. It was found that the granules with 2-3=E2=80=AFmm always had the maximum granulation rates after ultrasonic crushing. Meanwhile, activity data showed that the 2-3=E2=80=AFmm granules had the lowest specific oxygen utilization rates, which indicated that they were easier to maintain stability as the increase of their particle sizes was the slowest. So, 500=E2=80=AFmL mixed liquid of the reactor were taken out and sieved to obtain the 2-3=E2=80=AFmm granules, which were subsequently returned to the reactor to increase their proportion. Through the manual regulation, the proportion of 2-3=E2=80=AFmm granules kept increasing which gradually became dominant in the reactor. Under the strategy of 86 days of operation, the aerobic granules were regular and compact, which had good removal effects of the real wastewater. The results indicated that the stability of the system could be greatly enhanced by the method, which provided a new strategy to maintain the granular stability. Copyright =C2=A9 2019 Elsevier Ltd. All rights reserved.
    Download Collect
1

Contact

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

Submit Feedback