THE FORMATION OF AEROBIC GRANULAR SLUDGE INDUCED BY Ca2+, Mg2+ AND Fe2+ AND ITS SEWAGE TREATMENT EFFECT

WEN Yizheng; ZHENG Chaoqun; ZHENG Jie; LEI Xianyan; CAO Deju; SUN Xiang

doi:10.13205/j.hjgc.202208005

Volume 40 Issue 8

Nov. 2022

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WEN Yizheng, ZHENG Chaoqun, ZHENG Jie, LEI Xianyan, CAO Deju, SUN Xiang. THE FORMATION OF AEROBIC GRANULAR SLUDGE INDUCED BY Ca2+, Mg2+ AND Fe2+ AND ITS SEWAGE TREATMENT EFFECT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 40-46,190. doi: 10.13205/j.hjgc.202208005

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WEN Yizheng, ZHENG Chaoqun, ZHENG Jie, LEI Xianyan, CAO Deju, SUN Xiang. THE FORMATION OF AEROBIC GRANULAR SLUDGE INDUCED BY Ca²⁺, Mg²⁺ AND Fe²⁺ AND ITS SEWAGE TREATMENT EFFECT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 40-46,190. doi: 10.13205/j.hjgc.202208005

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THE FORMATION OF AEROBIC GRANULAR SLUDGE INDUCED BY Ca²⁺, Mg²⁺ AND Fe²⁺ AND ITS SEWAGE TREATMENT EFFECT

doi: 10.13205/j.hjgc.202208005

1. School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;
2. Anhui Landing Environmental Energy Technology Co., Ltd, Hefei 230036, China

Received Date: 2021-01-18
Publish Date: 2022-11-08

Abstract

Abstract

This paper studied Ca²⁺, Mg²⁺ and Fe²⁺promoting the formation of aerobic granular sludge, discussed the removal effect of aerobic granular sludge induced by Ca²⁺, Mg²⁺and Fe²⁺on COD, NH₄⁺-N and TP, studied the effects of environmental factors such as organic pollution load, temperature and aeration quantity on wastewater treatment, and then evaluated the operation stability of the granular sludge running for 60 days. The results showed that the addition of Ca²⁺, Mg²⁺ and Fe²⁺ could promote the granulation of AGS, and the intermediate diameter of the AGS reached 340 μm needed 18, 16, 11 days, respectively. The SVI_{30 min} of sludge induced by Ca²⁺, Mg²⁺and Fe²⁺ decreased continuously and got stabilized at a lower level. The value of MLSS was higher than that of the control, especially Fe²⁺, and its dehydrogenase activity was higher. The granular sludge induced by Ca²⁺, Mg²⁺ and Fe²⁺ all had a good treatment effect on COD, NH₄⁺-N and TP, significantly higher than the control group, especially the granular sludge induced by Fe²⁺. The granular sludge induced by Fe²⁺ showed a better removal effect on COD, NH₄⁺-N and TP in wastewater under ultra-low temperature (4 ℃), ultra-high temperature (40 ℃) and insufficient aeration (1 L/min). The granular sludge induced by Ca²⁺, Mg²⁺ and Fe²⁺ had good stability in sewage treatment in 60 days’ running. The removal rate of COD, NH₄⁺-N and TP in AGS induced by Fe²⁺ still came up with 96.3%, 96.8% and 88.7%.
- aerobic granules,
- Ca²⁺,
- Mg²⁺,
- Fe²⁺,
- particle forming time,
- sewage treatment effect,
- stability

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References(21)

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