Resource recovery technologies as microbial risk barriers: towards safe use of excreta in agriculture based on hazard analysis and critical control point

Oishi, Wakana; Vinnerås, Björn; Sano, Daisuke

doi:10.1039/d2ew00832g

Cited by 4 publications

(2 citation statements)

References 127 publications

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“…A single reviewer calculated the times for n LRVs (T90 for n = 1, T99 for n = 2, T99.9 for n = 3, and T99.99 for n = 4), as described in a previous study (24). Briefly, the Hom model (25) was fitted to the time-series data of surrogate inactivation identified through a systematic review.…”

Section: Methodsmentioning

confidence: 99%

Estimation of alkali dosage and contact time for treating human excreta containing viruses as an emergency response: a systematic review

Oishi,

Sano

2023

Front. Public Health

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Water, sanitation, and hygiene provisions are essential during emergencies to prevent infectious disease outbreaks caused by improper human excreta management in settlements for people affected by natural disasters and conflicts. Human excreta disinfection is required when long-term containment in latrines is not feasible on-site. Alkali additives, including lime, are effective disinfectants for wastewater and faecal sludge containing large amounts of solid and dissolved organic matter. The aim of this study was to determine the minimum dose and contact time of alkali additives for treating virus-containing human excreta in emergency situations. We used literature data collected by searching Google Scholar and Web of Science. The date of the last search for each study was 31th May 2023. Only peer-reviewed articles that included disinfection practices in combination with quantitative data for the physicochemical data of a matrix and viral decay were selected for data extraction. Two reviewers independently collected data from each study. We extracted datasets from 14 studies that reported quantitative information about their disinfection tests, including viral decay over time, matrix types, and physicochemical properties. Three machine learning algorithms were applied to the collected dataset to determine the time required to achieve specified levels of virus inactivation under different environmental conditions. The best model was used to estimate the contact time to achieve a 3-log10 inactivation of RNA virus in wastewater and faeces. The most important variables for predicting the contact time were pH, temperature, and virus type. The estimated contact time for 3 log inactivation of RNA virus was <2 h at pH 12, which was achieved by adding 1.8 and 3.1% slaked lime to wastewater and faeces, respectively. The contact time decreased exponentially with the pH of the sludge and wastewater. In contrast, the pH of the sludge and wastewater increased linearly with the slaked lime dosage. Lime treatment is a promising measure where long-term containment in latrine is not feasible in densely populated areas, as 1 day is sufficient to inactivate viruses. The relationship we have identified between required contact time and lime dosage is useful for practitioners in determining appropriate treatment conditions of human waste.

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Section: Methodsmentioning

confidence: 99%

Estimation of alkali dosage and contact time for treating human excreta containing viruses as an emergency response: a systematic review

Oishi,

Sano

2023

Front. Public Health

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“…In recent research, the SHELL model is widely used in accident risk analysis of aviation and military industries, which transcends the causal relationship and analyzes the correlation and influence between risk factors from the interaction process between humans and software, hardware, and the environment [10]. Meanwhile, the Hazard Analysis and Critical Point Control (HACCP) system has been widely adopted in the accident risk analysis of food [11] and agriculture [12], which verifies the effectiveness of the HACCP system for critical factor analysis. This shows that SHELL and HACCP have achieved good results in the process of risk analysis.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Risk Assessment Based on SHELL-HACCP-Cloud Model

Zhao,

Wei,

Gao

et al. 2023

Sustainability

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With the increasing demand and expanding scale of laboratories in colleges and universities, laboratory accidents frequently occur, seriously impacting personal health, schools, society, and the environment. Scientific and effective risk assessment is crucial to prevent accidents. Therefore, in order to effectively reduce the risk of chemical laboratories and minimize the frequency of accidents. This study employs the combination of the SHELL model and HACCP system to analyze the potential sources of hazards in hazardous chemical laboratories and establish a risk assessment index system. Based on the Cloud model, a dynamic risk assessment model for the laboratory is established to quantitatively evaluate the risk level of the evaluation results. In order to ensure the rationality of the assessment results, the subjective and objective weights are combined by the principle of minimizing information entropy. Case analysis proves the scientific validity of the evaluation results of the model, which can assist laboratory managers in formulating emergency plans and risk management mechanisms to reduce or eliminate the occurrence of experimental accidents. This approach ensures the safe and sustainable development of schools and laboratories, which is conducive to the progress of researchers’ scientific research results.

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Navigating quality, health and environmental risk: A novel framework for wastewater resource recovery products

Ardiyanti,

Azrague,

Medema

et al. 2024

Journal of Cleaner Production

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Resource recovery technologies as microbial risk barriers: towards safe use of excreta in agriculture based on hazard analysis and critical control point

Abstract: Agricultural use of human excreta contributes to sustainable nutrient resource management. In contrast, resource recovery from human excreta is associated with the risk of infection by pathogenic microorganisms. The microbial...

Cited by 4 publications

References 127 publications

Estimation of alkali dosage and contact time for treating human excreta containing viruses as an emergency response: a systematic review

Estimation of alkali dosage and contact time for treating human excreta containing viruses as an emergency response: a systematic review

Laboratory Risk Assessment Based on SHELL-HACCP-Cloud Model

Navigating quality, health and environmental risk: A novel framework for wastewater resource recovery products

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