Anaerobic digestion of livestock manure in cold regions: Technological advancements and global impacts

Yao, Yao; Huang, Guohe; An, Chunjiang; Chen, Xiujuan; Zhang, Peng; Xin, Xiaying; Shen, Jian; Agnew, J.

doi:10.1016/j.rser.2019.109494

Cited by 143 publications

(58 citation statements)

References 116 publications

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“…The chemical fertileizers (e.g., phosphorus and organic fertilizers) that were used in the cultivation of crops (e.g., peanuts, cotton, tobacco, and vegetables) would directly pollute rivers due to the erosion of rainfall and runoff. In addition, the denitrification of pathogenic microorganisms such as E. coli carried in organic fertileizers (e.g., livestock and poultry manure) and bacteria produced in the process of returning straw to the field also have contributed to nitrogen and phosphorus pollution in water (Jia and Zhang, 2015;Li et al, 2018;Wang et al, 2020;Yao et al, 2020). The variance contribution rate of PC2 is 28.97%, which is primarily related to EC and COD and can be classified as the common impact of natural and human activities.…”

Section: Temporal Variation Characteristics Of River Water Quality In Yihe River Basinmentioning

confidence: 99%

Spatio-Temporal Variation Characteristics of Water Quality and Its Response to Climate: A Case Study in Yihe River Basin

Ren¹,

Liu²,

Ding³

et al. 2021

J ENVIRON INFORM LET

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Spatial-temporal patterns of river water quality, the identification of pollution sources and contaminated areas are crucial to water environment protection and sustainable development of the river basin. In this study, spatial-temporal characteristics of river water quality in the Yihe river basin were investigated through multivariate analysis methods, including principal component analysis (PCA), cluster analysis (CA), discriminant analysis (DA), and one-way ANOVA. The water quality indicators (Hydrogen ion concentration (pH), electric conductivity (EC), dissolved oxygen (DO), turbidity, chemical oxygen demand (COD), total phosphorus (TP), and ammonia nitrogen (NH4 + -N)) were investigated at 17 sampling sites in three periods (i.e., high-, mean-, low flow period) during 2016 ~ 2017. The results show that: (1) PCA served to extract and recognize the most significant indicators affecting water quality in the Yihe river basin, i.e., pH, EC, COD, and NH4 + -N. (2) CA divided the Yihe river basin into three groups with similar water quality features, namely the upper, middle, and lower reaches. (3) DA demonstrated strong dimensionality reduction ability with the accuracy of clustering was 94.1%, and only a few indicators (i.e., DO, EC, turbidity, NH4 + -N, and TP) could reflect the spatial variations in water quality. (4) One-way ANOVA indicated that the water quality was the worst in the lower reach of Yihe river basin during the mean-flow period, followed by which in the upper and middle reaches during the high-flow period. (5) The spatiotemporal characteristics of water quality were mainly restrained by human factors (e.g., the construction of highway and agricultural activities), climate change (e.g., precipitation and temperature), and natural environments (e.g., topography).

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Section: Temporal Variation Characteristics Of River Water Quality In Yihe River Basinmentioning

confidence: 99%

Spatio-Temporal Variation Characteristics of Water Quality and Its Response to Climate: A Case Study in Yihe River Basin

Ren¹,

Liu²,

Ding³

et al. 2021

J ENVIRON INFORM LET

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“…In terms of the benefits of both photovoltaic cells and CHP, their results showed that medium density typically outperforms the highdensity centralized and low-density decentralized forms (Ishii et al, 2010). On the other hand, other researchers have noted that lower density in residential settings gives rise to more heat island formation than higher density, as it brings about more radiant heat energy (Yao et al, 2020). As such, policy makers should consider compact moderate-to-high-density residential development patterns for reducing emission of radiant heat energy (Stone and Rodgers, 2001).…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Urban Form on the Greenhouse Gas Emissions from Household Vehicles: A Review

Tian

An²,

Chen³

2020

J ENVIRON INFORM LET

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Urban growth is associated with a number of environmental issues. One of the most serious environmental concerns is the air pollutants and increasing greenhouse gas (GHG) emissions. This study presents a comprehensive review of the impact of urban form on the GHG emissions from household vehicles. A comparative study encompassing the methods used for identifying the relationship between urban form and vehicle GHG emissions was conducted. Household vehicle GHG emissions in different urban forms were investigated, drawing upon various existing studies. The internal variables that define urban form, such as density, connectivity, land use mix, and accessibility, were further discussed with respect to their degree of influence on household vehicle GHG emissions. Finally, a discussion of opportunities in urban form which may be conducive to household vehicle GHG emission mitigation in the long term was presented.

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“…While at thermophilic conditions, frequent acidification incidents were recorded, the limited buffer capacity of the influent feedstock was responsible for the unstable anaerobic digestion process (Treu et al 2018). Innovative techniques exploiting the high enzymatic activity of selected strains of psychrophilic and psychrotrophic microorganisms offer an alternative in this respect (Yao et al 2020). Their implementation would enable a significant reduction in Responsible Editor: Diane Purchase the operating expenses incurred to maintain appropriate thermal conditions in the reactors and allow disseminating anaerobic technologies in regions with unfavorable climatic characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to look for such solutions that would be satisfactory from both the technological and economic point of view. The efficiency of psychrophilic fermentation can be improved by learning the mechanisms of biogas production by psychrophilic microorganisms isolated from natural ecosystems (Yao et al 2020), because an average annual temperature of over 85% of the Earth's biosphere is below 5°C (Rivkina et al 2004). Methanogenic microorganisms, which are strict anaerobes, are widespread in the natural environment, including, i.e., bottom sediments of surface reservoirs (Tabassum and Rajoka 2000), peat bogs (Garcia et al 2000), and the digestive system of humans and animals (Levitt et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficiency of sweet whey fermentation with psychrophilic methanogens

Dębowski

Korzeniewska

Kazimierowicz

et al. 2021

Environ Sci Pollut Res

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Sweet whey is a waste product from the dairy industry that is difficult to manage. High hopes are fostered regarding its neutralization in the methane fermentation. An economically viable alternative to a typical mesophilic fermentation seems to be the process involving psychrophilic bacteria isolated from the natural environment. This study aimed to determine the feasibility of exploiting psychrophilic microorganisms in methane fermentation of sweet whey. The experiments were carried out under dynamic conditions using Bio Flo 310 type flow-through anaerobic bioreactors. The temperature inside the reactors was 10 ± 1 °C. The HRT was 20 days and the OLR was 0.2 g COD/dm3/day. The study yielded 132.7 ± 13.8 mL biogas/gCODremoved. The CH4 concentration in the biogas was 32.7 ± 1.6%, that of H2 was 8.7 ± 4.7%, whereas that of CO2 reached 58.42 ± 2.47%. Other gases were also determined, though in lower concentrations. The COD and BOD5 removal efficiency reached 21.4 ± 0.6% and 17.6 ± 1.0%, respectively.

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Anaerobic digestion of livestock manure in cold regions: Technological advancements and global impacts

Cited by 143 publications

References 116 publications

Spatio-Temporal Variation Characteristics of Water Quality and Its Response to Climate: A Case Study in Yihe River Basin

Spatio-Temporal Variation Characteristics of Water Quality and Its Response to Climate: A Case Study in Yihe River Basin

Assessing the Impact of Urban Form on the Greenhouse Gas Emissions from Household Vehicles: A Review

Efficiency of sweet whey fermentation with psychrophilic methanogens

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