Wastewater Treatment Capacity, Food Production and Health Risk in Peri-urban Areas: A Comparison of Three Cities

2014 ◽  
pp. 219-231
Author(s):  
Daniel Van Rooijen ◽  
Ian Smout ◽  
Pay Drechsel ◽  
Trent Biggs
Keyword(s):  
Wastewater Treatment ◽  
Health Risk ◽  
Urban Areas ◽  
Food Production

scholarly journals Health Risk Assessment Indicators for the Left-Behind Elderly in Rural China: A Delphi Study

2020 ◽  
Vol 17 (1) ◽  
pp. 340 ◽  
Author(s):  
Ruzhen Luo ◽  
Chunmei Zhang ◽  
Yanhui Liu
Keyword(s):  
Risk Assessment ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Delphi Study ◽  
Index System ◽  
Urban Areas ◽  
Health Management ◽  
Assessment Index ◽  
Left Behind ◽  
Assessment Index System

In China, many young and middle-aged rural residents move to urban areas each year. The rural elderly are left behind. The number of the rural left-behind elderly is increasing with urbanization, but it is unclear which indicators can be used to assess their health condition. The health risk assessment index system was developed to improve the health level of the rural left-behind elderly. A two-round web-based Delphi process was used to organize the recommendations from fifteen Chinese experts in geriatrics, health management, social psychology who participated in this study. Meaningfulness, importance, modifiability, and comprehensive value of the health risk assessment indicators in the index system were evaluated. The effective recovery rates of the two-round Delphi were 86.67% and 92.31%, respectively. The judgement coefficient and the authority coefficient were 0.87 and 0.82, respectively. The expert familiarity was 0.76. Ultimately, the health risk assessment index system for the rural left-behind elderly consisted of five first-level indicators, thirteen second-level indicators, and sixty-six third-level indicators. The final indicators can be used to evaluate the health of the rural left-behind elderly and provide the basis for additional health risk interventions.

History and Current Situation of Night Soil Treatment Systems and Decentralized Wastewater Treatment Systems in Japan

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
X.M. Yang ◽  
A. Morita ◽  
I. Nakano ◽  
Y. Kushida ◽  
H. Ogawa
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Urban Areas ◽  
Domestic Wastewater ◽  
Soil Treatment ◽  
Decentralized System ◽  
Decentralized Wastewater Treatment ◽  
Rapid Economic Growth ◽  
Unique System ◽  
Wastewater Treatment Systems

In Japan, night soil, or black water, was formerly used as fertilizer for agriculture. However, during the rapid economic growth that took place after 1960, chemical fertilizers began to be adopted for agriculture and night soil was almost abandoned. How to treat the excess of night soil then became a big challenge to tackle. From that time a variety of night soil treatment technologies have been developed and the Japanese government has actively promoted the construction of night soil treatment facilities all over the country. As measures for domestic wastewater treatment, sewerage systems were spread in high-density urban areas, while a decentralized system called johkasou was diffused in rural areas with low population density. Johkasou is a unique system that was devised in Japan and mainly treats domestic wastewater on-site. Night soil treatment systems and decentralized wastewater treatment systems used in Japan are introduced in this paper, in the hope that the experience acquired in Japan will contribute to improve the sanitation conditions in other countries.

scholarly journals Quantitative Microbial Risk Assessment for Workers Exposed to Bioaerosol in Wastewater Treatment Plants Aimed at the Choice and Setup of Safety Measures

2018 ◽  
Vol 15 (7) ◽  
pp. 1490 ◽  
Author(s):  
Annalaura Carducci ◽  
Gabriele Donzelli ◽  
Lorenzo Cioni ◽  
Ileana Federigi ◽  
Roberto Lombardi ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Sensitivity Analysis ◽  
Wastewater Treatment ◽  
Health Risk ◽  
Average Risk ◽  
Quantitative Microbial Risk Assessment ◽  
Exposure Limits ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
The Impact

Biological risk assessment in occupational settings currently is based on either qualitative or semiquantitative analysis. In this study, a quantitative microbial risk assessment (QMRA) has been applied to estimate the human adenovirus (HAdV) health risk due to bioaerosol exposure in a wastewater treatment plant (WWTP). A stochastic QMRA model was developed considering HAdV as the index pathogen, using its concentrations in different areas and published dose–response relationship for inhalation. A sensitivity analysis was employed to examine the impact of input parameters on health risk. The QMRA estimated a higher average risk in sewage influent and biological oxidation tanks (15.64% and 12.73% for an exposure of 3 min). Sensitivity analysis indicated HAdV concentration as a predominant factor in the estimated risk. QMRA results were used to calculate the exposure limits considering four different risk levels (one illness case per 100, 1.000, 10.000, and 100.000 workers): for 3 min exposures, we obtained 565, 170, 54, and 6 GC/m3 of HAdV. We also calculated the maximum time of exposure for each level for different areas. Our findings can be useful to better define the effectiveness of control measures, which would thus reduce the virus concentration or the exposure time.

Airborne bacteria in a wastewater treatment plant: Emission characterization, source analysis and health risk assessment

2019 ◽  
Vol 149 ◽  
pp. 596-606 ◽  
Author(s):  
Kaixiong Yang ◽  
Lin Li ◽  
Yanjie Wang ◽  
Song Xue ◽  
Yunping Han ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Wastewater Treatment ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Source Analysis ◽  
Airborne Bacteria

scholarly journals Potential of urban green spaces for supporting horticultural production: a national scale analysis

2021 ◽  
Author(s):  
Lael E Walsh ◽  
Bethan R Mead ◽  
Charlotte A Hardman ◽  
Daniel Evans ◽  
Lingxuan Liu ◽  
...  
Keyword(s):  
Urban Areas ◽  
Food Production ◽  
Food System ◽  
Fruit And Vegetables ◽  
Green Spaces ◽  
Scale Analysis ◽  
National Scale ◽  
Domestic Production ◽  
Urban Green ◽  
Urban Green Spaces

Abstract As urban areas and land-use constraints grow, there is increasing interest in utilizing urban spaces for food production. Several studies have uncovered significant potential for urban growing to supplement production of fruit and vegetables, focusing on one or two cities as case studies, whilst others have assessed the global scale potential. Here, we provide a national-scale analysis of the horticultural production potential of urban green spaces, which is a relevant scale for agri-food and urban development policy making using Great Britain (GB) as a case study. Urban green spaces available for horticultural production across GB are identified and potential yields quantified based on three production options. The distribution of urban green spaces within 26 urban towns and cities across GB are then examined to understand the productive potential compared to their total extent and populations. Urban green spaces in GB, at their upper limit, have the capacity to support production that is 8x greater than current domestic production of fruit and vegetables. This amounts to 38% of current domestic production and imports combined, or >400% if exotic fruits and vegetables less suited to GB growing conditions are excluded. Most urban green spaces nationally are found to fall within a small number of categories, with private residential gardens and amenity spaces making up the majority of space. By examining towns and cities across GB in further detail, we find that the area of green space does not vary greatly between urban conurbations of different sizes, and all are found to have substantial potential to meet the dietary needs of the local urban population. This study highlights that national policies can be suitably developed to support urban agriculture and that making use of urban green spaces for food production could help to enhance the resilience of the national-scale food system to shocks in import pathways, or disruptions to domestic production and distribution.

scholarly journals Quantitative Health Risk Assessment of Wastewater Treatment Plant Worker Exposed to Staphylococcus Aureus Bioaerosol During Warm and Cold Periods: Disease Burden and Sensitivity Analysis

2021 ◽  
Author(s):  
Jia-xin Ma ◽  
Bei-bei Cui ◽  
Man-li Liu ◽  
Jie Yuan ◽  
Cheng Yan
Keyword(s):  
Risk Assessment ◽  
Staphylococcus Aureus ◽  
Sensitivity Analysis ◽  
Wastewater Treatment ◽  
Health Risk ◽  
Disease Burden ◽  
Quantitative Estimation ◽  
Ingestion Rate ◽  
Treatment Plant ◽  
Quantitative Microbial Risk Assessment

Abstract Biological treatment in wastewater treatment plants (WWTPs) releases high amounts of bioaerosols carrying a variety of pathogens. Quantitative microbial risk assessment (QMRA) is a framework prevalently intended for the quantitative estimation of health risks for occupational exposure scenarios (e.g. in WWTPs). However, the quantitative contributions of health-risk-estimate inputted variable parameters remain ambiguous. Therefore, this research aimed to study the disease burden of workers exposed to Staphylococcus aureus bioaerosol during warm and cold periods and to strictly quantify the contributions of the inputted parameters of disease burden by sensitivity analysis based on Monte Carlo simulation. The results showed that the disease health risk burden in the warm period was higher than in the cold period, disease health risk burden in the rotating-disc aeration mode was regularly higher than in the microporous aeration mode. The disease health risk burden of the workers with personal protective equipment (PPE) almost all satisfied the WHO benchmark (≤10E-6 DALYs pppy), and was consistently lower by one or two orders of magnitude than the workers without PPE in both warm and cold periods. Referring to the sensitivity analysis, exposure concentration and aerosol ingestion rate were the most and second predominant factor for the estimated risk in all exposure scenarios, respectively. The sensitivity of the removal fraction by employing PPE ranked third in the contribution to disease health risk burden. In addition, no remarkable differences were revealed in the sensitivity percentage ratio between warm and cold periods. This research can deepen the understanding of the QMRA framework and promote the development of sensitivity analysis, especially under various meteorological conditions (warm and cold periods).

scholarly journals Comparative market supply of protein from livestock and fish in the selected urban areas of Rajshahi district in Bangladesh

2017 ◽  
Vol 4 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Md Mizanoor Rahman ◽  
Khan Shahidul Huque ◽  
Nani Gopal Das ◽  
Md Yousuf Ali Khan
Keyword(s):  
Socioeconomic Status ◽  
Food Insecurity ◽  
Seasonal Variations ◽  
Urban Areas ◽  
Food Production ◽  
Resource Base ◽  
Regional Variations ◽  
Initial Work ◽  
Safe Food ◽  
Wet Market

The study was conducted with the objectives to determine the market availability of animal sourced foods (ASF) and fish, and their share in the supply of biomass and protein through visiting the wet markets of metropolitan and municipality areas of Rajshahi district, Bangladesh. A preset questionnaire was used for recording the biomass weight of different ASF and fish in every four days interval in March, 2016. It was found that the supply of ASF (beef, chevon, chicken and egg) and fish in the metropolitan markets (80.20 and 35.89 t/d, respectively) was significantly higher (P<0.05) than any municipality wet market in the district (7.66 and 3.03 t/d, respectively). The market supply of biomass and its protein value of ASF were 3.64 and 4.33 times higher than fish. The chicken shared the highest amount of protein (28.19 %) followed by fish (26.8%), beef (26.21%), eggs (11.46%) and chevon (7.34%) during the study period. However, this initial work does not include milk, and the wet market of ASF and fish may have seasonal variations which needs to be explored through further research. In addition to them, socioeconomic status of consumers and regional variations are important which needs to be studied for addressing resource base safe food production help the strategic reduction of food insecurity in the country by 2030.Res. Agric., Livest. Fish.4(1): 29-36, April 2017

scholarly journals Evaluation of perfluorinated compounds in seven wastewater treatment plants in Beijing urban areas

2010 ◽  
Vol 54 (3) ◽  
pp. 552-558 ◽  
Author(s):  
YuanYuan Pan ◽  
YaLi Shi ◽  
JieMing Wang ◽  
YaQi Cai
Keyword(s):  
Wastewater Treatment ◽  
Urban Areas ◽  
Wastewater Treatment Plants ◽  
Perfluorinated Compounds

Pollution levels and health risk assessment of particulate phthalic acid esters in arid urban areas

2017 ◽  
Vol 8 (1) ◽  
pp. 188-195 ◽  
Author(s):  
He-Hua Zeng ◽  
Hong-Xi Zhang ◽  
Xia Wu ◽  
Hong-Xin Gu ◽  
Li-Zhong Zhang ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Urban Areas ◽  
Phthalic Acid ◽  
Phthalic Acid Esters ◽  
Pollution Levels ◽  
Acid Esters

scholarly journals Healthier breath for all and everywhere – Urban air quality monitoring experience

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
J Gajic ◽  
D Dimovski ◽  
B Vukajlovic ◽  
M Jevtic
Keyword(s):  
Public Health ◽  
Air Pollution ◽  
Air Quality ◽  
Health Risk ◽  
Urban Health ◽  
Urban Areas ◽  
Danube River ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Residential Areas

Abstract Issue/problem Increasing attention is being paid to air pollution as one of the greatest threats to public and urban health. The WHO’s Urban Health Initiative points out the importance of collecting data and mapping the present state of air quality in urban areas. For citizens, such engagement is enabled by the appearance of personal air quality measurement devices that use crowd-sourcing to make measurement results publicly accessible in real time. Description of the problem As a way of contributing to air pollution monitoring in their town, three PhD Public health students conducted over 40 measurements between the start of June and end of August 2018 on various locations in the city of Novi Sad, Serbia. Measurements were performed using AirBeam personal air quality monitoring devices and their results presented as μg/m3 of Particulate Matter 2.5 (PM2.5) and automatically uploaded to the internet using the Air-casting app. Results Measurements conducted in public transportation vehicles returned the rather high average value of 40 μg/m3, where coffee shops and restaurants scored an even higher value of 48,67 μg/m3. The lowest average air pollution levels were registered near the Danube river bank (5.67) and in the parks (6), while the sites near crossroads or in the street showed average air pollution of 8.33 μg/m3. Residential areas where smoking is present during the day reported 2.5 times higher PM2.5 values than those without smokers (33.8 and 12.78 μg/m3). Lessons Bearing in mind that the air quality is considered as a serious health risk in urban areas, results of this pilot investigation suggest potential health risk for citizens living in urban areas. The negative effects of combustion and smoking on air quality are strongly highlighted, as well as the positive impact of green areas and parks near residential areas. Key messages Air pollution exposure as a serious health risk in urban areas. Crowdsourcing as a way of air quality monitoring has great potential for contributing to public health.

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