Development of a Quality Certification and Maturity Classification Method for Liquid Fertilizer by Measuring the Electrical Conductivity (EC) of Swine Manure

Halder, Joshua Nizel; Kang, Taek Won; Yabe, Mitsuyasu; Lee, Myung Gyu

doi:10.5109/1801784

Cited by 4 publications

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“…According to these authors, salinity can have a detrimental effect on seed germination and plant growth, especially during seedling development. In this sense, Halder et al [66] observed a negative correlation between EC and GI. Additionally, a positive correlation between COD T and IC 50 of R. sativus in the present study was found.…”

Section: Discussionmentioning

confidence: 94%

Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry

et al. 2023

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Background: Pig slurry can negatively impact on the environmental, animal, and human health. Knowing the relationship between the organic and inorganic loads, pathogens, and toxicity allows identifying the main parameters to be removed or treated before final disposal. The aim of this study was to evaluate the relationships between the physicochemical properties, microbiological, and parasitological content, ecotoxicological effects, and biochemical methane potential (BMP) of pig slurries. Methods: Ten pig slurry samples at two production stages were characterized and a BMP test at two substrate/inoculum (S/I) ratios was conducted to compare the methane yields. Results: We found high content of Cu, Zn, quaternary ammonium, pathogenic microorganisms (E. coli and Salmonella), and parasites (Trichuris and Trichostrongylus). Toxicity on lettuce, radish, and Daphnia was observed with a slurry concentration greater than 1.35%. Positive correlations were found between toxicity on Daphnia and chemical oxygen demand (COD), sulfate, Zn, and Cu, as well as between phytotoxicity and COD, NH4, Na, K, and conductivity. The lowest S/I ratio showed 13% more methane yield. It was associated with high removals of COD and volatile fatty acids. Conclusions: We recommend using a low S/I ratio to treat pig slurry as it improves the efficiency of the anaerobic process.

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Section: Discussionmentioning

confidence: 94%

Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry

et al. 2023

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Proximal Sensing Provides Clean, Fast, and Accurate Quality Control of Organic and Mineral Fertilizers

Andrade¹,

Silva²,

Benedet³

et al. 2023

Preprint

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Research on the Control System for the Use of Biogas Slurry as Fertilizer

Jiang,

Zhang,

et al. 2024

Agronomy

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Due to its rich nutritional composition, biogas slurry can serve as a special liquid fertilizer. However, the application of slurry in agricultural fields currently faces challenges such as reliance on skilled famers’ experience, low precision, and difficulty in accurately controlling the irrigation dosage. To address these issues, an agricultural biogas slurry mixing agricultural machinery and its system has been designed and developed with the aim of enhancing the precision and safety of slurry application. The structure of the device has been designed, filter components have been selected, and improvements have been made to the structure of traditional connectors. Taking into account factors such as soil and humidity, an algorithm based on biogas slurry conductivity for slurry mixing decisions and the feedback control mechanism has been designed. After assembling the prototype, experiments were conducted, and the results showed that after processing by the system, compared to the calculated theoretical optimum, the concentration error of each component in the mixed fertilizer was controlled within 10%, and the conductivity fluctuation range was within 5%. This indicates that the overall ratio accuracy and stability of the biogas slurry mixing system are high. The biogas slurry mixing agricultural machinery and its system provide a novel intelligent equipment solution for the precise application of slurry, effectively enhancing the accuracy and safety of slurry application, reducing the use of chemical fertilizers during agricultural irrigation, and minimizing pollution to the environment and soil.

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Development of a Quality Certification and Maturity Classification Method for Liquid Fertilizer by Measuring the Electrical Conductivity (EC) of Swine Manure

Cited by 4 publications

References 0 publications

Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry

Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry

Proximal Sensing Provides Clean, Fast, and Accurate Quality Control of Organic and Mineral Fertilizers

Research on the Control System for the Use of Biogas Slurry as Fertilizer

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