Utilization of Thermophilic Aerobic Oxidation and Electrocoagulation to Improve Fertilizer Quality from Mixed Manure Influent

Halder, Joshua Nizel; Lee, Myung-Gyu; Kim, Soo-Ryang; Hwang, Okhw

doi:10.3390/agronomy12061417

Cited by 2 publications

(1 citation statement)

References 81 publications

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“…The fermented liquid manure (FLM) was created from livestock manure, which was provide from hog farm (37°30 '33.1948211615924"N 128°04'56.5629151080066"E) after the livestock excretion had decomposed for one year. The organic medium developed from livestock manure was produced following a previously described method [29] and was used to grow Chlorella fusca, which was provided by the National Institute of Agricultural Sciences, Republic of Korea. Chlorella was grown in an incubator (Fig.…”

Section: Plant Growth and Fertilizersmentioning

confidence: 99%

Influence of organic liquid fertilizer developed from livestock manure on the growth, antioxidant activities, and soil microbial populations of Chinese cabbage

Lee

Shim

et al. 2023

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Background Effluents from livestock excretion have worldwide environmental disadvantages, such as air and water pollution. However, livestock manure and organic liquid fertilizers developed for the proper management of livestock excretions can be used as environmentally friendly fertilizers for sustainable agriculture. Therefore, we investigated the effects of organic liquid fertilizers on the growth and antioxidant accumulation in Chinese cabbage (Brassica rapa subsp. Pekinensis). Results Three liquid fertilizers, chemical liquid fertilizer (CLF), fermented liquid manure (FLM) from pig droppings, and liquid bio-fertilizer (LBF) from Chlorella cultured in purified organic liquid manure, were used in this experiment. Plant performance was observed and soil microbial changes caused by these liquid fertilizers were analyzed using 16S rRNA sequencing. We observed the highest plant growth in terms of plant length, chlorophyll concentration, width and length of leaves, and fresh and dry weights in the CLF group. LBF led to improved plant growth compared to FLM. Chlorophyll concentrations and color measurements of the plants were higher with LBF than with FLM. Interestingly, LBF affected plant substances with respect to sugar, ascorbic acid, and antioxidants in Chinese cabbage compared to CLF and FLM. The highest total polyphenol and flavonoid content, antioxidant activity, nitrite-scavenging capacity, and reducing power were observed in the LBF group. Significant changes in the bacterial population were observed in amplicon sequence variant analysis; the presence of Verrucomicrobia increased in soils after FLM and LBF treatments. LBF-treated soils had a higher abundance of Proteobacteria than FLM-treated soils. Conclusions We studied the effects of organic fertilizers across different liquid fertilizers on plant growth, antioxidants, and soil microorganisms. Especially, the LBF as organic bio-liquid fertilizer improved the plant growth and substances in Chinese cabbage under a controlled environment agriculture system. We have identified the specific bacterial species regarding the production process of liquid fertilizers in the change of soil microbial communities by the short-term experimental treatment. Thus, the proper development of organic bio-liquid fertilizer can contribute to the organic waste-recycling systems of livestock excretions for sustainable agriculture.

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Section: Plant Growth and Fertilizersmentioning

confidence: 99%

Influence of organic liquid fertilizer developed from livestock manure on the growth, antioxidant activities, and soil microbial populations of Chinese cabbage

Lee

Shim

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

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Urban land use, land cover change and urban microclimate dynamics in Addis Ababa, Ethiopia

Negesse,

Hishe,

Getahun

2024

Discov Environ

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Land surface temperature (LST) increases and urban heat island (UHI) variability are the major urban climatology problems arising in urban development. This study attempts to assess the effects of urban land use and land cover change on microclimate dynamics in Addis Ababa city. Three different sets of remotely sensed data from Landsat 5 TM (1990), Landsat 7 ETM+ (2005) and Landsat 8 OLI/TIRS (2021) were used for the study. LSTs were retrieved from Landsat5 TM and Landsat7 ETM+ using a mono window,and the thermal infrared band (TR-10) of Landsat–8 was used to retrieve LST. Regression and correlation analyses of the LST, normalized difference vegetation index (NDVI) and normalized difference built-up index (NDBI) were performed in SPSS V23. The study also examined the different residential urban morphology types (UMTs) of the LST and NDVI. The selected built-up blocks of UMTs included apartments, villas and mud houses. These UMTs are extracted by digitizing them from the Google Earth explorer. The results from this study showed that the proportion of urban green space (UGS) to other LULC types decreased from 120.4 km2 in 1990 to 76.26 km2 in 2021. However, the built-up area increased at a rate of 216.5 km2 (39.03%) from 1990 to 2021. The rapid expansion of built-up land in the study area was the main factor influencing the increase in LST. The residential UMTs exhibited significant differences in mean LSTs and NDVIs. The results indicate that UMT inhibited by Villia had the highest mean NDVI value and that the highest mean LST was observed in Apartment. The results of multiple linear regression analysis clearly indicate that built-up and green vegetation contributed 92.2% of the LST variations with R2 = 0.92 and VIF ≤ 10 in Addis Ababa city. The results of the study indicate that strengthening public participation in urban greening and optimizing the NDVI and NDBI are important strategies for mitigating the effects of microclimate change and that sustaining urban development and providing better quality of life for the urban population are important.

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Utilization of Thermophilic Aerobic Oxidation and Electrocoagulation to Improve Fertilizer Quality from Mixed Manure Influent

Cited by 2 publications

References 81 publications

Influence of organic liquid fertilizer developed from livestock manure on the growth, antioxidant activities, and soil microbial populations of Chinese cabbage

Influence of organic liquid fertilizer developed from livestock manure on the growth, antioxidant activities, and soil microbial populations of Chinese cabbage

Urban land use, land cover change and urban microclimate dynamics in Addis Ababa, Ethiopia

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