WANG Zhao-zhao,ZHANG Huan,YAN Li-na,et al.Recovery and Operational Characteristics of Anammox Process after High Salinity Shock[J].China Water & Wastewater,2021,37(3 3):16-23.
Click Copy

Recovery and Operational Characteristics of Anammox Process after High Salinity Shock

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 3 3 Page: 16-23 Column: Date of publication: 2021-02-01
Author(s):
WANG Zhao-zhao1; 2; ZHANG Huan1; 2; YAN Li-na3; GAO Peng1; 2; WU Xin-juan1; 2; MA Jun1; 2; YIN Chun-yu1; 2; LI Si-min1; 2
(1. Hebei Technology Innovation Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan 056038, China; 2. School of Energy and Environmental Engineering, Hebei University of Engineering, Handan 056038, China; 3. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)
Keywords:
biological nitrogen removal; salinity; Anammox; activity recovery; sludge morphology
Abstract:
The recovery and operational characteristics of Anammox process after high salinity shock were investigated by stepwise increasing influent nitrogen loading rate (NLR) from 1.06 kg/(m3·d) to 1.42 kg/(m3·d) in an upflow anaerobic sludge blanket (UASB). After operating for 156 days, the removal efficiencies of? NH4+-N、NO2--N and TN reached 97.57%, 96.40% and 83.90%,and the total nitrogen removal loading (NRR) reached 1.19 kg/(m3·d), which was attributed to the effective recovery of Anammox sludge activity ［specific degradation rate of TN increased from 0.131 mg/(mgVSS·d) to 0.302 mg/(mgVSS·d)］. With the recovery of the process performance, the color of the granular sludge turned from deep brown to red brown, and the average particle size increased,among which granules with particle size larger than 1.5 mm accounted for the maximum proportion of 68.25%. Moreover, EPS content increased from 96.66 mg/g to 147.98 mg/g, and PN/PS ratio increased from 4.86 to 13.34, which further proved that the Anammox process recovered to an efficient operational state.
Last Update: 2021-02-01