Characterization of humic substances recovered from the sewage sludge and validity of their removal from this waste

Michalska, Justyna; Turek–Szytow, Jolanta; Dudło, Agnieszka; Surmacz-Górska, Joanna

doi:10.1016/j.bioeco.2022.100026

Cited by 28 publications

(7 citation statements)

References 151 publications

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“…The pH increases to 7.64 at 42 C. In contrast, the pH of anaerobically stabilized sludge varies between 6.7 and 7.8 (Michalska et al 2022). The findings of the current study are consistent with previously reported results (Table 2).…”

Section: Resultssupporting

confidence: 92%

Physicochemical and Biological Characteristics of Shrimp Pond Sludge in the Thua Thien Hue Province, Vietnam

et al. 2022

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This study has been carried out to analyze the physical and biological indicators of shrimp pond sludge samples obtained from the Phu Vang and Phu Loc districts of the Thua Thien Hue Province, Vietnam. All standard methodologies have been used to analyze the selected parameters like pH, organic carbon, total nitrogen, total phosphate, and microbial density. The results of the study revealed that the sludge was characterized by a neutral to alkaline pH (6.9 - 7.5), and the total organic carbon content was in the range of 103.8–173.5 mg/kg. The sludge was rich in organic matter (17.8–29.9%), total nitrogen (13.5–32.5 g/kg), and total phosphate (7.9-20.1 g/kg). Further, in the case of the microbial density of pathogenic microorganisms, the density of total bacteria, coliform, E.coli, Salmonella spp., Vibrio spp., and Clostridium spp. was also estimated at two opposing weather conditions (spring, February to March; summer, June to July). The microbial community increased rapidly during the cool spring months. The total bacterial levels were recorded as 8.77 log10 CFU/mL in the Phu Loc district and 9.11 log10 CFU/mL in the Phu Vang district. The levels decreased during the hot summer months, and the level of total bacteria, Coliform, E.coli, Salmonella spp., and Vibrio was reported 2.57, 1.49, 1.06, 0.56, and l2.54 log10 CFU/mL respectively from the Phu Loc district of Vietnam. The results obtained using the anaerobic decomposition model showed that on the 60th day, the amount of CH4 generated at the high output value for the Phu Vang district was 22385 ppm. The results reported here revealed that CH4 gas can be potentially produced from shrimp waste sludge in this province.

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Section: Resultssupporting

confidence: 92%

Physicochemical and Biological Characteristics of Shrimp Pond Sludge in the Thua Thien Hue Province, Vietnam

et al. 2022

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“…It is possible that differences in chemical composition the might have contributed to the differential detection of SARS-CoV-2 variants in the two wastewater fractions (liquid influent and primary sludge). For instance, certain humic substances are important constituents of sewage sludge (Michalska et al 2022) and are likely to deter viral replication by adsorbing onto the envelope protein and blocking cell surface entry. They have been demonstrated to have a selective inhibition effect on some naked as well as enveloped viruses such as HIV, CMV, Influenza A, and HSV-1, potentially also inhibiting SARS-CoV-2 activity (Hafez et al 2020).…”

Section: Resultsmentioning

confidence: 99%

Analysis of SARS-CoV-2 amino acid mutations in New York City Metropolitan wastewater (2020-2022) reveals multiple traits with human health implications across the genome and environment-specific distinctions

Asundi

Long

Chandran

2022

Preprint

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We characterize variant diversity, amino acid mutation frequency, functionality and associations with COVID-19 infections in one of the largest datasets of SARS-CoV-2 genome sequences collected from wastewater in the New York metropolitan area. Variant diversity differed within parts of the New York City sewershed and between wastewater sludge and influent samples. P314L, D614G and T3255I occurred in >95% of wastewater samples. Enhanced infectivity, transmissibility and escape from antibody neutralization were dominant traits in the wastewater. Strikingly, over 60% of the most frequently occurring mutations were found in regions other than the spike (S) protein, and nearly 50% remain uncharacterized for functional impacts warranting further investigation. We demonstrate strong correlations between P314L, D614G, T95I, G50E, G50R, G204R, R203K, G662S, P10S, P13L and mortality rates, percent positive test results, hospitalization rates and % of population fully vaccinated. The results from our study suggest that there are relatively understudied mutations in the spike protein (H655Y, T95I) and understudied mutations occurring in non-spike proteins (N, ORF1b, ORF9b and ORF9c), that are enhancing transmissibility and infectivity among human populations, warranting further investigation.

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“…Possuem várias utilidades devido a seus grupos funcionais e podem ser divididas em três tipos de acordo com sua solubilidade na água, sendo estes ácido fúlvico, ácido húmico e humina (MOTOJIMA et al, 2012). Mesmo sendo possível aplicar tais substâncias em operações agrícolas, os meios onde são encontrados, como lodo de esgoto por exemplo, podem ser extremamente tóxicos e contaminantes ao solo e água se aplicados diretamente, devendo então passar por tratamento para separação dos componentes e uma utilização correta das substâncias húmicas, assim também aumentando a valorização do tratamento de lodo de esgoto (MICHALSKA et al, 2022). A extração de substâncias húmicas normalmente é feita a partir de matérias-primas como carvão ou turfa, que são limitados e sua extração é extremamente regulamentada (CRISTINA et al, 2020).…”

Section: Substâncias Húmicasunclassified

Uso de bioestimulantes na produção agrícola

Arejano¹,

Bartz²,

Santos³

et al. 2022

Aspectos Da Biotecnologia Agrícola Aplicada

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ResumoO presente estudo tem como objetivo observar e analisar resultados da aplicação de bioestimulantes na produção agrícola de diversas culturas, através de revisão bibliográfica extensiva. Com a evolução da produção agrícola nas últimas décadas e a explosão no crescimento populacional mundial, há a constante demanda por métodos mais eficientes de produção alimentícia e menos impactantes sobre o meio ambiente e a sanidade humana e animal, dando o termo conhecido como "agricultura sustentável", no qual é possível produzir mais com menos recursos. Os bioestimulantes promovem a melhora da floração, do crescimento das plantas, da frutificação, da produtividade das culturas e uma maior eficiência do uso de nutrientes, além de serem capazes de melhorar a tolerância da planta contra uma ampla gama de estresses abióticos. Estas substâncias podem ser aplicadas através do tratamento de sementes, por meio de sulco, na forma localizada no colo da planta, e até mesmo por pulverização foliar. As diferentes aplicações promovem respostas favoráveis das plantas em diversos processos metabólicos, uma vez que são constituídos por reguladores vegetais ou sintéticos, com vitaminas e micronutrientes, podendo ser divididos em quatro grupos principais: biorreguladores, aminoácidos, substâncias húmicas e extrato de algas. O mercado de bioestimulantes tem evoluído, e este crescimento é atribuído à implantação de práticas sustentáveis na agricultura, a fim de limitar o uso de químicos prejudiciais, promovendo uma menor toxicidade tanto para o ambiente como para a saúde humana. Dessa forma, a utilização de bioestimulantes se torna uma alternativa sustentável para uma produção agrícola mais eficiente. Entretanto, ainda são necessários mais estudos para comprovar seus benefícios na aplicação em diversas culturas. Por conta disso, existe o interesse de incrementar esse setor, pelo qual este estudo visualiza como inovador e diferencial.

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Characterization of humic substances recovered from the sewage sludge and validity of their removal from this waste

Cited by 28 publications

References 151 publications

Physicochemical and Biological Characteristics of Shrimp Pond Sludge in the Thua Thien Hue Province, Vietnam

Physicochemical and Biological Characteristics of Shrimp Pond Sludge in the Thua Thien Hue Province, Vietnam

Analysis of SARS-CoV-2 amino acid mutations in New York City Metropolitan wastewater (2020-2022) reveals multiple traits with human health implications across the genome and environment-specific distinctions

Uso de bioestimulantes na produção agrícola

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