Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni

YANG Guang; ZHANG Guangming; ZHANG Panyue; YANG Anqi; WANG Yuanyuan; TANG Xiang

doi:10.12030/j.cjee.201611116

2017 Volume 11 Issue 9

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Abstract

References

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YANG Guang, ZHANG Guangming, ZHANG Panyue, YANG Anqi, WANG Yuanyuan, TANG Xiang. Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4971-4977. doi: 10.12030/j.cjee.201611116

Citation:

YANG Guang, ZHANG Guangming, ZHANG Panyue, YANG Anqi, WANG Yuanyuan, TANG Xiang. Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4971-4977. doi: 10.12030/j.cjee.201611116

Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni

1.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
2.
School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China
3.
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China

Received Date: 20/12/2016
Accepted Date: 16/11/2016
Available Online: 26/08/2017

Fund Project:

Abstract

The use of large amount of fossil energy has caused serious environment and energy problems. Sludge anaerobic digestion has been considered as a potential method to solve above problems. However, conventional sludge anaerobic digestion has some drawbacks such as low efficiency and long sludge retention time. This paper investigated effects of adding trace elements Fe and Ni on biogas production and organic matters removal during sludge anaerobic digestion. As for biogas production, results showed that when FeCl2 concentration was added below 400 mg·L-1, biogas production was higher than that of control. The highest biogas yield of 414.6 mL·g-1(VSadded) was obtained at the adding dosage of 25 mg·L-1, which was 28 mL·g-1(VSadded) higher than that of control. Cumulative biogas production increased with the increase of NiCl2 addition dosages in the range of 0~5 mg·L-1. The highest biogas yield of 389.5 mL·g-1(VSadded) were obtained at the NiCl2 adding dosage of 5 mg·L-1. At the optimal condition, the enhancement of biogas by adding FeCl2 was higher than that by adding NiCl2. As for organic matters removal, the volatile solids removal was slight improved by adding 25 mg·L-1 FeCl2 compared with control, and then decreased with the increase of FeCl2 addition dosage. The volatile solids removal was decreased with the increase of NiCl2 addition dosage compared with control. The best adding dosage of FeCl2 was 25 mg·L-1 during sludge anaerobic digestion based on biogas yield, volatile solids removal and cost. The soluble chemical oxygen demand and volatile fatty acids concentrations were improved by 15.3% and 39.2% with the addition of 25 mg·L-1 FeCl2, which provided a better substrate condition for biogas production.
- sludge anaerobic digestion,
- trace elements,
- FeCl2,
- NiCl2,
- hydrolysis,
- acidification

References

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沈阳化工大学材料科学与工程学院沈阳 110142

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Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni

Received Date: 20/12/2016

Accepted Date: 16/11/2016

Available Online: 26/08/2017

Fund Project:

Key words:

Abstract: The use of large amount of fossil energy has caused serious environment and energy problems. Sludge anaerobic digestion has been considered as a potential method to solve above problems. However, conventional sludge anaerobic digestion has some drawbacks such as low efficiency and long sludge retention time. This paper investigated effects of adding trace elements Fe and Ni on biogas production and organic matters removal during sludge anaerobic digestion. As for biogas production, results showed that when FeCl2 concentration was added below 400 mg·L-1, biogas production was higher than that of control. The highest biogas yield of 414.6 mL·g-1(VSadded) was obtained at the adding dosage of 25 mg·L-1, which was 28 mL·g-1(VSadded) higher than that of control. Cumulative biogas production increased with the increase of NiCl2 addition dosages in the range of 0~5 mg·L-1. The highest biogas yield of 389.5 mL·g-1(VSadded) were obtained at the NiCl2 adding dosage of 5 mg·L-1. At the optimal condition, the enhancement of biogas by adding FeCl2 was higher than that by adding NiCl2. As for organic matters removal, the volatile solids removal was slight improved by adding 25 mg·L-1 FeCl2 compared with control, and then decreased with the increase of FeCl2 addition dosage. The volatile solids removal was decreased with the increase of NiCl2 addition dosage compared with control. The best adding dosage of FeCl2 was 25 mg·L-1 during sludge anaerobic digestion based on biogas yield, volatile solids removal and cost. The soluble chemical oxygen demand and volatile fatty acids concentrations were improved by 15.3% and 39.2% with the addition of 25 mg·L-1 FeCl2, which provided a better substrate condition for biogas production.

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Enhancement of sludge anaerobic digestion by adding trace element Fe and Ni

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通讯作者: 陈斌, bchen63@163.com

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