Response of phosphorus speciation to organic loading rates and temperatures during anaerobic co-digestion of animal manures and wheat straw

被引:20
作者
Li, Bowen [1 ]
Dinkler, Konstantin [2 ]
Zhao, Nan [1 ,3 ]
Ran, Xueling [1 ]
Sobhi, Mostafa [4 ]
Dong, Renjie [1 ]
Mueller, Joachim [5 ]
Xiong, Wei [6 ]
Huang, Guangqun [1 ]
Guo, Jianbin [1 ]
Oechsner, Hans [2 ]
机构
[1] China Agr Univ, Coll Engn, Key Lab Clean Utilizat Technol Renewable Energy, Minist Agr, Beijing 100083, Peoples R China
[2] Univ Hohenheim, State Inst Agr Engn & Bioenergy, D-70593 Stuttgart, Germany
[3] Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450001, Peoples R China
[4] Alexandria Univ, Fac Agr, Agr & Biosyst Engn Dept, Alexandria 21526, Egypt
[5] Univ Hohenheim, Inst Agr Engn Trop & Subtrop, D-70599 Stuttgart, Germany
[6] Hubei Lvxin Ecol Technol Co Ltd, Yicheng 441400, Peoples R China
基金
中国国家自然科学基金;
关键词
Phosphorus speciation; Anaerobic digestion; Organic loading rate; Temperature; CHICKEN MANURE; RECOVERY; PRECIPITATION; PHOSPHATE; AVAILABILITY; OPTIMIZATION; PERFORMANCE; COMMUNITY;
D O I
10.1016/j.scitotenv.2022.155921
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The world is facing huge phosphate (P) shortage and anaerobic digestion (AD) is a recognized technology to promote nutrient (N and P) recycling. The composition of P speciation in the digestate is essential for the fertilizing effect. However, how P speciation in the digestates interacts with the AD process conditions is unknown. Therefore, interaction of P speciation in digestates with AD process conditions was investigated by using a chemical sequential extraction method (Hedley fractionation) and X-ray diffraction; specifically, the effects of organic loading rate (OLR), temperature, and substrate composition were investigated. The results showed that OLR and feedstock affected P speciation in the digestate significantly due to different ion species and ionic strengths. The H2O-P concentration in chicken manure with straw (CMS) and dairy manure with straw (DMS) digestates decreased by 44.04-48.7 6% and 48.88-50.49%, respectively, as the OLR increased from 2 to 4 kg VS m(-3) d(-1). Simultaneously, HCl-P increased by 38.02-44.01% in the CMS digestates due to Ca-P and Mg-P formation, indicating that Ca-P and Mg-P formation was positively correlated with OLR, whereas P mobility decreased. Further, thermophilic temperature conditions were more conducive for the formation of insoluble P than mesophilic temperature conditions in the digestates due to the thermodynamic driving force of the reactions. The results would facilitate the understanding of P transformation in the AD process under the influence of feedstock, OLR, and temperature. From the viewpoint of nutrient management, lower OLR and temperature are more beneficial for a fast P availability, whereas higher OLR and temperature are more helpful for storage and export because of P precipitated into solid phase of digestate.
引用
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页数:8
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