The Initial Study on the Application of Sewage Sludge for Agriculture on the Laboratory Scale

Tran, Thanh; Giang, Lam Van; Loc, Ho Huu; Hong, Le Thi Anh; Thi, Van Doan; Tan, Lam Van

doi:10.4028/www.scientific.net/msf.1048.524

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…The emergence of microbial fertilizers has met the needs of farmers by increasing crop yields, improving soil quality, while avoiding pollution and reducing investment costs [4]. Microbial fertilizers, relying on various strains of microorganisms, can decompose organic substances in sludge [5], waste [6], agricultural residues [7], and by-products, resulting in biomass that is beneficial for both plants and information and chemical composition indicated by the manufacturer. The containers must be unopened and in their original packaging.…”

Section: Introductionmentioning

confidence: 99%

Exploring the influence of agrochemicals on beneficial microbial communities in soil

Hong,

Trung,

Duong

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Ensuring the safe value of agricultural products is crucial for the sustainable development of agriculture, which requires the rational use of both chemical and biological products. However, the use of current agrochemicals can adversely affect the beneficial microorganisms in soil and reduce their efficacy. This study aimed to evaluate the impact of 16 commonly used agrochemicals on five microbial species, including Bacillus sp., Pseudomonas sp., Saccharomyces sp., Azotobacter sp., and Trichoderma sp. The evaluation criteria comprised the assessment of direct effects at the time of exposure and after three days. The research results indicated that agrochemicals have a negative effect on experimental microorganisms. Specifically, when in direct contact, the chemical components ethoprophos, metalaxyl, and mancozeb contained in 2 out of 16 chemicals exhibited a 100% negative impact on all 5 species of microorganisms, while the other chemical components present in the remaining chemicals had an impact level of over 75%. Based on the experiments conducted, the results suggest that the appropriate time to use microbiological preparations is at an interval of 7 days after the application of the aforementioned agrochemicals.

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Section: Introductionmentioning

confidence: 99%

Exploring the influence of agrochemicals on beneficial microbial communities in soil

Hong,

Trung,

Duong

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Therefore, this study experimented with reusing cassava peel waste from a starch factory to cultivate grey oyster mushrooms. With the current trend of industries moving towards sustainable development and promoting solid waste treatment technology, the research aims to provide an effective, safe, and economically feasible method for treating Cyanide in cassava peel waste and opening up opportunities for its reuse in agriculture [13]. This is a typical case to help agricultural processing companies solve waste problems in a circular economy context.…”

Section: Introductionmentioning

confidence: 99%

Circular Economy Approach: Cultivating Grey Oyster Mushroom using Cassava (Manihot esculenta) Peel Waste from Starch Production

Huynh¹,

Trung

Loc

et al. 2023

E3S Web of Conf.

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Cassava (Manihot esculenta) is an important staple crop in Vietnam and is estimated to produce about 10.7 million tons of starch annually. The starch production process generates a large amount of solid waste, namely cassava peels, which are currently disposed of directly into the environment. This practice poses a risk of generating foul odor, attracting disease-carrying organisms, and directly affecting human health. Therefore, reusing cassava peels for growing gray oyster mushrooms is the most appropriate solution. First and foremost, the cyanide content in cassava peels must be treated using the Sun-drying method. Results showed that the cyanide level decreased to the optimal level of 0 mg/kg from 34 mg/kg. After reusing cassava peels to grow gray oyster mushrooms, the results showed that the highest yield was 272 g/bag for cassava peels substrate, while the highest yield for sawdust substrate was 293 g/bag. Statistical evaluations showed that reusing cassava peels to replace sawdust substrate for growing gray oyster mushrooms also resulted in an equivalent yield. Utilizing the substrate after growing mushrooms on cassava peels to grow cabbage produced a germination rate and plant height development equivalent to those grown on commercial fertilizer substrate.

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Enhancing Soil Bioremediation: Microbial Composting Strategies for the Degradation of Chlorpyrifos Ethyl in Agricultural Soils

Nguyen,

Trung

et al. 2024

E3S Web of Conf.

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The study investigates the decomposition of Chlorpyrifos Ethyl (CE) in tea-growing soils using Biomix under varied conditions, aiming to enhance the safety of agricultural products. Biomix 1 demonstrated a significant capability for degrading CE, particularly at higher temperatures and an optimal pH of 6. It showcased higher microbial density for lignindecomposing organisms at 4.68×105 CFU/g for cellulose decomposition, 3.6×105 CFU/g for hemicellulose, and 2.5×105 CFU/g for lignin, indicating robust biodegradation potential. An intriguing outcome was Biomix 2’s improved performance with nitrogen supplementation, reaching over 96% degradation efficiency for CE at a concentration of 150ppm. Temperature fluctuations within the composting bins pointed to the thermophilic nature of the degrading microbes, with an initial increase to 35°C and subsequent stabilization, suggesting a vigorous decomposition phase followed by a plateau due to substrate depletion. These findings indicate that microbial composting at optimized moisture (60%) and pH levels can significantly degrade CE, with a higher degradation rate observed at 37°C compared to 25°C. Biomix amendments and maintained conditions reflect the practical application potential, aligning with the common agricultural CE concentrations of 120-150ppm. This study underlines the viability of using microbial composting as a sustainable and effective strategy for the bioremediation of pesticide-contaminated agricultural soils, with promising implications for environmental safety and public health.

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The Initial Study on the Application of Sewage Sludge for Agriculture on the Laboratory Scale

Cited by 4 publications

References 5 publications

Exploring the influence of agrochemicals on beneficial microbial communities in soil

Exploring the influence of agrochemicals on beneficial microbial communities in soil

Circular Economy Approach: Cultivating Grey Oyster Mushroom using Cassava (Manihot esculenta) Peel Waste from Starch Production

Enhancing Soil Bioremediation: Microbial Composting Strategies for the Degradation of Chlorpyrifos Ethyl in Agricultural Soils

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