Effects of nitrogen loading from domestic wastewater on groundwater quality

Mester, Tamás; Balla, Dániel; Karancsi, Gergő; Bessenyei, Éva; Szabó, György

doi:10.17159/wsa/2019.v45.i3.6731

Cited by 18 publications

(11 citation statements)

References 19 publications

(24 reference statements)

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“…The majority of pit latrines or pits are an earth bottom, lined or unlined wall, unventilated tank that allows wastewater to seepage into the soil and sludges builds up in the bottom of the pit. This wastewater tanks pose a significantly higher risk of environmental damage than do septic tanks, are the most important sources of contamination of the groundwater [23]. While in public sanitation facility at study locations use communal containment, normally with septic tank or anaerobic baffled reactor (ABR) system.…”

Section: Faecal Sludge Disposal and Treatment In Rural Areasmentioning

confidence: 99%

Integrated Community Onsite Sanitation System for Close Loop Faecal Management

Hastuti

Riyana²,

Joy

et al. 2021

E3S Web Conf.

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The achievement of safe sanitation access is about 7.42 % in 2018, that indicates high risk of faecal contamination from unmanaged onsite sanitation system and has not been fully supported by faecal sludge service. This paper described the study of characteristic of onsite sanitation and faecal sludge for review potential of integrating of sludge handling with improved communal wastewater treatment. Faecal sludge quality were observed from pit latrines and communal septic tank, then analysis method apply cluster analysis and through close loop approach consider treatment and disposal for resource recovery. The pilot model of combined treatment of wastewater and faecal sludge was developed by anaerobic digester with a maximum 5% sludge loading, then further treatment by biofilter system and sludge drying bed. The quality of treated water can meet COD and nitrogen as effluent standard, biosolid reached a stabilization index of 40 - 60%, water content of 50-60% and less Coliform bacteria content. The characteristics of faecal sludge strength to be handled will be influenced bytechnical aspect or environment. The integrated system could be applied to manage wastewater and faecal sludge and its by products, mainly for rural area has not been catered by faecal sludge service.

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Section: Faecal Sludge Disposal and Treatment In Rural Areasmentioning

confidence: 99%

Integrated Community Onsite Sanitation System for Close Loop Faecal Management

Hastuti

Riyana²,

Joy

et al. 2021

E3S Web Conf.

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“…120,000 m 3 every year) could have seeped into the soil and groundwater [46]. This significant pollution discharge has caused heavy contamination in the settlement [47]. In 2014 a sewage system was constructed in the settlement and therefore the majority of the local sources of contamination were eliminated [48].…”

Section: Study Area and Data Collectionmentioning

confidence: 99%

Geovisualization Techniques of Spatial Environmental Data Using Different Visualization Tools

et al. 2020

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The appearance of online map services and frameworks (e.g., KML, QGIS) has increased the possibilities to easily, quickly and—in many cases—cost-effectively publish spatial data stored in databases. The aim of this study is to present the geovisualization of spatial databases of a Hungarian settlement on the web, using the open source webGIS system and Google application programming interfaces (APIs). The interactive point and interpolated distribution maps available online provide a detailed picture of the level of contamination, the spatial distribution of the ground water supply of the investigated settlement, and the changes which have occurred following the establishment of the sewage system. In the case of PO43− we determined that in the year before the sewage system was constructed, most of the area of the settlement could be considered contaminated, with the highest level of contamination measured in the central area of the settlement. Five years after the construction of the sewage system, the ratio of the contaminated areas had significantly decreased. In the case of NO3− we found a high level of contamination before the construction of the sewage system with a concentration increase in a North–West direction. After the establishment of the sewage system, the increase in concentration was the most intense in the central parts of the settlement, while the characteristic spatial distribution could no longer be observed. The geovisualization techniques developed are able to provide information about the different spatial data for users in a visual way, and also help to understand better the spatial information using a cognitive approach. The advantage of interactive web maps created with the technologies applied over traditional static maps is a new approach, which allows the user to manipulate the temporal and spatial data directly in the most appropriate way.

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“…In parallel with the construction of the drinking water network, the sewerage network and wastewater treatment plants were not established in many countries around the world, therefore municipal wastewater from households is stored in various installations without insulation in the yard of households (cesspits, soakaways, septic tanks) became a widespread practice [1][2][3][4][5]. Wastewater flowing out of these point sources resulted in a sharp degradation of the groundwater supply in the municipalities [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Shallow Groundwater Purification Processes after the Construction of a Municipal Sewerage Network

Mester

Szabó

Balla

2021

Water

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In the present study, the impact of the construction of the sewerage network (2014) on groundwater quality was studied on the example of a middle-sized settlement in the Great Hungarian Plain and changes in water quality were assessed using GIS and multivariate statistical analysis. As a result of the pollution that has been going on for decades, the groundwater supply of the municipality has become heavily polluted. In the period before sewerage (2011–2013), clear spatial differences were shown in the degree of contamination in the area of the settlement: the degree of contamination increased in the direction of local groundwater flow. Based on our results, the construction of the sewerage network resulted in marked changes in the quality of groundwater wells. Our studies showed a clear decrease in the concentrations of inorganic pollutants (NH4+, NO2−, NO3−, PO43−). In the fifth year of the post-sewerage period (2019), the clear spatial difference between wells was eliminated. We have observed a strong descent (1.5 to 2 m) in groundwater levels in the post-sewerage period, the reason for that is clearly due to that wastewater outflow was eliminated. On this basis, it can be declared that the purification processes in the area have started, but at the same time, our results show that pollutants entering environment undergo a number of transformations and remain in the system for a long time.

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Effects of nitrogen loading from domestic wastewater on groundwater quality

Cited by 18 publications

References 19 publications

Integrated Community Onsite Sanitation System for Close Loop Faecal Management

Integrated Community Onsite Sanitation System for Close Loop Faecal Management

Geovisualization Techniques of Spatial Environmental Data Using Different Visualization Tools

Assessment of Shallow Groundwater Purification Processes after the Construction of a Municipal Sewerage Network

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