Effects of Combined Technologies on Environmental Prevention against Livestock Pollution in Biogas Projects
Publication: Journal of Environmental Engineering
Volume 145, Issue 8
Abstract
To resolve the contradiction between livestock development and environmental pollution, anaerobic fermentation in biogas projects has been used for more missions, such as co-generation of heat and power, production of anaerobic digested fertilizer for the prevention and control of livestock pollution. The aim of this work was to investigate the effects of combined technologies on biogas slurry treatment. Chemical flocculation can remove the total solids (TS), chemical oxygen demand (CODcr), total phosphorus (TP), and total nitrogen (TN) at rates of 89.4%, 95.9%, 98.0% and 73.9%, respectively. However, removal of ammonia nitrogen () (37.1%) and soluble potassium (3.4%) is poor. A facultative oxidation pond can remove and soluble K at rates of 63.5% and 47.5%, respectively. In addition, an ecological forest can remove , soluble K, and TP at rates of 93.1%, 54.9%, and 70%, respectively. Heavy metal pollution is effectively controlled through the whole workflow. Ultraviolet disinfection is still required for pathogen elimination, although the combined processing has a remarkable impact on the removal of fecal coliforms and total coliforms.
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Acknowledgments
The authors would like to thank Mr. Haihua Yin and Mr. Yinli-Zhang from Shanghai Linhai Ecological Technology Corp. for in situ sample collection, and Ms. Tinghua Chen and Ms. Wenyan Shen from the Institute of New Rural Development, Tongji University, for some assay experiments. This work was supported by the Shanghai Science Technology Committee (Grant No. 15391912902).
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©2019 American Society of Civil Engineers.
History
Received: Aug 16, 2018
Accepted: Jan 4, 2019
Published online: May 31, 2019
Published in print: Aug 1, 2019
Discussion open until: Oct 31, 2019
ASCE Technical Topics:
- Animals
- Biomass
- Chemical compounds
- Chemical elements
- Chemical properties
- Chemicals
- Chemistry
- Construction engineering
- Construction management
- Ecosystems
- Energy engineering
- Energy sources (by type)
- Environmental engineering
- Fuels
- Livestock
- Nitrogen
- Non-renewable energy
- Nutrient pollution
- Pollution
- Project management
- Solubility
- Thermal pollution
- Water pollution
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