Control of pathogenic microorganisms in wastewater recycling and reuse in agriculture

Shuval, Hillel I.; Fattal, B.

doi:10.1016/b978-012470100-7/50016-9

Cited by 15 publications

(14 citation statements)

References 24 publications

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“…Potential adverse effects include also the disturbance of soil microbiota (Table 3). Phenolic compounds may promote changes in the soil microbial community structure and function, for instance through the stimulation of primary phenol degraders and trophically related populations (DeRito et al, 2005;Sinsabaugh, 2010). Surfactants, such as linear alkylbenzene sulfonate (LAS), are other common waste-water contaminants, which accumulation in soil may have adverse effects.…”

Section: Contaminantsmentioning

confidence: 99%

“…In addition, indirect transmission pathways include the air, due to the formation of aerosols, or water, due to runoff or leaching (Hussain et al, 2002). The risks posed to humans by pathogens transmitted through wastewater irrigation are difficult to estimate, but will depend, amongst other factors, on the survival of pathogens in the environment, the infective dose, and the host immunity (Hussain et al, 2002;Shuval and Fattal, 2003). In the environment, in particular in soil, the survival of exogenous microorganisms, including pathogens, depends on factors such as the antagonism with native microbiota, moisture content, organic matter, pH, and temperature (Brandl, 2006;Shuval and Fattal, 2003).…”

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

“…Campylobacter spp.) up to one year for the highly resistant eggs of the helminth Ascaris (Shuval and Fattal, 2003), or much longer periods for fungi spores (e.g. Hemileia vastatrix, Puccinia melanocephala, Puccinia striiformis f. sp.…”

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

“…Another risk is that bacteria transmitted by this pathway may be inherited through plant seeds, as has been described for some endophytic bacteria (Burnett et al, 2000;Cooley et al, 2003;Guo et al, 2001;Rosenblueth and Martínez-Romero, 2006;Tyler and Triplett, 2008;Wang et al, 2006). The risks associated with the dis-semination of human pathogens due to the use of treated wastewater for irrigation can be considered low (Bichai et al, 2012;Shuval and Fattal, 2003). However, a pathway of transmission, comprising treated wastewater, soilvegetables and human consumers, can be defined and should be considered when the implications of wastewater irrigation are discussed.…”

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

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Wastewater reuse in irrigation: A microbiological perspective on implications in soil fertility and human and environmental health

Becerra-Castro

Lopes

Vaz‐Moreira

et al. 2015

Environment International

396

211

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The reuse of treated wastewater, in particular for irrigation, is an increasingly common practice, encouraged by governments and official entities worldwide. Irrigation with wastewater may have implications at two different levels: alter the physicochemical and microbiological properties of the soil and/or introduce and contribute to the accumulation of chemical and biological contaminants in soil. The first may affect soil productivity and fertility; the second may pose serious risks to the human and environmental health. The sustainable wastewater reuse in agriculture should prevent both types of effects, requiring a holistic and integrated risk assessment. In this article we critically review possible effects of irrigation with treated wastewater, with special emphasis on soil microbiota. The maintenance of a rich and diversified autochthonous soil microbiota and the use of treated wastewater with minimal levels of potential soil contaminants are proposed as sine qua non conditions to achieve a sustainable wastewater reuse for irrigation.

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Section: Contaminantsmentioning

confidence: 99%

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

Section: Risk Of Dissemination Of Pathogens Through Wastewater Reusementioning

confidence: 99%

See 2 more Smart Citations

Wastewater reuse in irrigation: A microbiological perspective on implications in soil fertility and human and environmental health

Becerra-Castro

Lopes

Vaz‐Moreira

et al. 2015

Environment International

396

211

View full text Add to dashboard Cite

show abstract

“…The structure of a detritus tank is to ensure that solely sand without any organic material will be settling down. However, it is highly complicated to achieve these conditions considering the high level of inflow irregularity, and therefore a high level of concentration of organic material is to be considered to be present in the excavated material (Shuval, Fattal 2003). It is essential to return these organic materials in the treatment process.…”

mentioning

confidence: 99%

Microbial contamination of the sand from the wastewater treatment plants

Szostková

Vítěz

2010

Res. Agric. Eng.

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Szostková M., Vítěz T., 2010. Microbial contamination of the sand from the wastewater treatment plants. Res. Agr. Eng., Primary treatment of domestic wastewater represents an extensive range of physical and chemical activities which directly or indirectly affect functionality of the treatment plant as a whole. The aforementioned effect might be rather significant in many respects. However, an incorrectly designed or operated primary treatment might result in an unnecessary increase of operating costs and, principally, a negative impact on the biological level or sludge treatment and disposal. The subject matter of this contribution comprises contemplations related to functionality of this level, both with respect to its relation to functionality of wastewater treatment plant and the matter of created waste in case of which disposal has become more and more expensive and complicated. The measurement results show that sewage sand from different wastewater treatment plants contains different amount of organic material 1.19-82%. The content of the organic material relates to the content of microorganisms which oscillated in a range of 1.53×10 4 -7.34×10 6 CFU/g for coliform bacteria including Escherichia coli, 5.57×10 1 -4.36×10 4 CFU/g for enterococci, and 3.13×10 2 -2.19×10 5 CFU/g for faecal coliform bacteria.Keywords: wastewater treatment; primary treatment; detritus tank; wastewater treatment sand; microbial contamination A detritus tank proves to have a key role in the process of primary treatment of wastewater. The principal task of a detritus tank is to collect the maximum possible amount of mineral substances from wastewater in a manner ensuring that organic substances will remain present in the uplift and they are to flow to the subsequent treatment level. The structure of a detritus tank is to ensure that solely sand without any organic material will be settling down. However, it is highly complicated to achieve these conditions considering the high level of inflow irregularity, and therefore a high level of concentration of organic material is to be considered to be present in the excavated material (Shuval, Fattal 2003). It is essential to return these organic materials in the treatment process. Should a detritus tank fail to function, the mixture of organic material and sand creates a sediment layer that causes major problems in the following stages of wastewater treatment. Sand separated in the wastewater treatment process may, however, contain germs of pathogenic microorganisms that would -in high concentrations -represent a risk pertaining to its subsequent treatment (Schroeder, Wuertz 2003;Gerardi, Zimmerman 2004;Bitton 2005).Legislative Requirements: As regards the legislation, the matter of treatment of sand from wasteRes. Agr. Eng. Vol. 56, 2010, No. 4: 147-153 (Table 1). Considering the most common manner of sand removal by the means of disposal, it is necessary to face additional legislative requirements resulting from the valid judicial practice. The respective scope covers prin...

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Population Growth and Its Impact on the Design Capacity and Performance of the Wastewater Treatment Plants in Sedibeng and Soshanguve, South Africa

Teklehaimanot¹,

Kamika²,

Coetzee³

et al. 2015

Environmental Management

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This study investigated the effects of population growth on the performance of the targeted wastewater treatment plants in Sedibeng District and Soshanguve peri-urban area, South Africa. The impact of population growth was assessed in terms of plant design, operational capacity (flow rate) and other treatment process constraints. Between 2001 and 2007, the number of households connected to the public sewerage service increased by 15.5, 17.2 and 37.8% in Emfuleni, Lesedi and Midvaal Local Municipalities, respectively. Soshanguve revealed a 50% increment in the number of households connected to the sewerage system between 1996 and 2001. Except for Sandspruit (-393.8%), the rate of influent flows received by Meyerton increased by 6.8 ML/day (67.8%) and 4.7 ML/day (46.8%) during the dry and wet seasons, respectively. The flow rate appeared to increase during the wet season by 6.8 ML/day (19.1%) in Leeuwkuil and during the dry season by 0.8 ML/day (3.9%) in Rietgat. Underperformance of the existing wastewater treatment plants suggests that the rapid population growth in urban and peri-urban areas (hydraulic overloading of the wastewater treatment plants) and operational constraints (overflow rate, retention time, oxygen supply capacity of the plants and chlorine contact time) resulted in the production of poor quality effluents in both selected areas. This investigation showed that the inefficiency of Meyerton Wastewater Treatment Plant was attributed to the population growth (higher volumes of wastewater generated) and operational constraints, while the cause of underperformance in the other three treatment plants was clearly technical (operational).

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Control of pathogenic microorganisms in wastewater recycling and reuse in agriculture

Cited by 15 publications

References 24 publications

Wastewater reuse in irrigation: A microbiological perspective on implications in soil fertility and human and environmental health

Wastewater reuse in irrigation: A microbiological perspective on implications in soil fertility and human and environmental health

Microbial contamination of the sand from the wastewater treatment plants

Population Growth and Its Impact on the Design Capacity and Performance of the Wastewater Treatment Plants in Sedibeng and Soshanguve, South Africa

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