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Mariska Ronteltap

Mariska Ronteltap
Delfland Water Authority

PhD

About

40
Publications
27,891
Reads
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1,570
Citations
Education
January 2002 - October 2006
ETH Zurich
Field of study
  • Environmental Technology
January 1994 - December 1999
Wageningen University & Research
Field of study
  • Environmental Engineering

Publications

Publications (40)
Book
Full-text available
Faecal sludge management is recognized globally as an essential component of city-wide inclusive sanitation. However, a major gap in developing appropriate and adequate management and monitoring for faecal sludge is the ability to understand and predict the characteristics and volumes of accumulated faecal sludge, and correlations to source populat...
Article
Full-text available
Sudan has witnessed a revolution in 2019 placed technocrat's ministers to govern Sudan through 3 years transitional period. Although more than one year has passed, a peace agreement is still in the process. The large numbers of Internally Displaced Persons (IDP) of over 3.3 million countrywide living in camps in town outskirts pose a challenge to t...
Book
Full-text available
This is a translation of the original title in the Hindi language.
Book
Full-text available
This is a translation of the original title in the Marathilanguage.
Article
Full-text available
Biochemical energy recovery using digestion and co-digestion of faecal matter collected from urine diverting dehydrating toilet faeces (UDDT-F) and mixed organic market waste (OMW) was studied under laboratory- and pilot-scale conditions. Laboratory-scale biochemical methane potential (BMP) tests showed an increase in methane production with an inc...
Article
Digestion and co-digestion of faecal matter collected from urine diverting dehydrating toilet faeces (UDDT-F) and mixed organic market waste (OMW) was studied in single stage pilot scale mesophilic plug-flow anaerobic reactors at UDDT-F:OMW ratios 4:1 and 1:0. Escherichia coli inactivation and volatile fatty acids (VFA) build-up was monitored at sa...
Article
This study examined the potential of Escherichia coli (E. coli) and Ascaris lumbricoides (A. lumbricoides) eggs inactivation in faecal matter coming from urine diverting dehydrating toilets (UDDT-F) by applying high concentrations of volatile fatty acids (VFAs) during anaerobic stabilization. The impact of individual VFAs on E. coli and A. lumbrico...
Article
Studies show that source separated human excreta have a fertilizing potential with benefits to plant growth and crop yield similar or exceeding that of mineral fertilizers. The main challenges in fertilizing with excreta are pathogens, and an increased risk of eutrophication of water bodies in case of runoff. This review shows that lactic acid ferm...
Conference Paper
Full-text available
Abstract: Globally the amount of refugees is growing, due to natural disasters or political turmoil. Often they are offered shelter in refugee camps in relative vicinity –these camps are referred to as Internally Displaced Persons (IDP) camps when in the same country. While conflicts may linger on, refugees can stay up to 20 years in these camps. B...
Article
Full-text available
During storage of urine, urea is biologically decomposed to ammonia, which can be lost through volatilization and in turn causes significant unpleasant smell. In response, lactic acid fermentation of urine is a cost-effective technique to decrease nitrogen volatilization and reduce odour emissions. Fresh urine (pH = 5.2–5.3 and NH4+-N = 1.2–1.3 g L...
Article
Human feces from urine diverting dry toilets can serve as valuable soil conditioners. For a successful agricultural application, an efficient pathogen reduction needs to be ensured, with no negative effects on plants. This study assessed the efficiency of lacto-fermentation combined with thermophilic composting on pathogen removal from human feces...
Article
Resource oriented sanitation has emerged as a need to improve the efficacy of excreta treatment schemes, reduce the environmental pollution from their disposal and improve soil fertility. In urine diverting dry toilets, the storage alone is inefficient for faeces treatment due to poor hygienization, incomplete decomposition, as well as high losses...
Poster
Full-text available
The research concludes that PSS is a feasible option for Darfur IDP camps and that there are several reuse options which could be pursued, such as composting, biochar, and water recycling. However, the sustainability of PSS will depend on the sanitation providers and their ability to integrate local enterprises in the production of different PSS un...
Article
Full-text available
On-site sanitation provisions in urban slums rarely prioritise grey water management, yet it forms the largest fraction of wastewater. This study was carried out to characterise grey water and quantify its pollutant loads in Bwaise III (Uganda) and to provide data for grey water management in urban slums of developing countries. Samples were collec...
Book
Full-text available
Más de 1.000 millones de personas en las áreas urbanas y peri-urbanas de África, Asia y América utilizan tecnologías descentralizadas de saneamiento. Hasta ahora se ha descuidado tremendamente el manejo de los lodos fecales producidos por estas tecnologías. Los recursos financieros son frecuentemente insuficientes y estos sistemas descentralizados...
Book
Full-text available
Over a billion people in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation technologies. Until now, the management of faecal sludge resulting from these onsite technologies has been grossly neglected. Financial resources are often lacking, and onsite sanitation systems tend to be regarded as temporary sol...
Article
Two uPVC columns (outer diameter 160 cm, internal diameter 14.6 cm and length 100 cm) were operated in parallel and in series to simulate grey water treatment by media based filtration at unsaturated conditions and constant hydraulic loading rates (HLR). Grey water from bathroom, laundry and kitchen activities was collected from 10 households in th...
Article
Decentralised grey water treatment in urban slums using low-cost and robust technologies offers opportunities to minimise public health risks and to reduce environmental pollution caused by the highly polluted grey water i.e. with a COD and N concentration of 3000–6000 mg L−1 and 30–40 mg L−1, respectively. However, there has been very limited acti...
Article
Full-text available
To determine the magnitude of microbial risks from waterborne viruses and bacteria in Bwaise III in Kampala (Uganda), a typical slum in Sub-Saharan Africa. A quantitative microbial risk assessment (QMRA) was carried out to determine the magnitude of microbial risks from waterborne pathogens through various exposure pathways in Bwaise III in Kampala...
Article
Full-text available
Bangladesh has made a significant contribution to supply improved sanitation facilities in rural areas in recent years. As it is the most known option, pit latrines were the most favourable technology. Yet, as Bangladesh is a country of flooding and high groundwater table, pit latrines not only flush out and cause pollution; they also become inacce...
Article
Full-text available
In this paper, we discuss the possibilities for separate urine collection, treatment and reuse. Treatment technologies are discussed per category of hygienisation, volume reduction, stabilisation, phosphorus and nitrogen removal. Several recovery products can be obtained, of which the slow-release fertiliser struvite is the most common. Urine can...
Article
Struvite crystallisation is a fast and reliable phosphorus removal and recovery process for concentrated waste streams - such as hydrolysed human urine. In order to optimise P-elimination efficiency, it is beneficial to obtain larger particle sizes: they are easier to separate and less prone to wash-out than smaller particles. This paper presents t...
Article
In this paper, the possible integration of human excreta management and solid waste management is studied. We focus on integration options with respect to transport and processing, taking into consideration the sustainability aspects ''technical/perfor-mance'' and to a smaller extent ''institutional/organisational''. We do this for a case study in...
Article
Full-text available
Natural organic matter (NOM) occurs throughout the hydrologic cycle, varying in both amount and character. In this paper, a description of NOM in surface and drinking water, in groundwater and in seawater is presented. Water samples representing these environments were collected and characterized using multiple NOM characterization techniques, incl...
Article
Separating urine from wastewater at the source reduces the costs of extensive wastewater treatment. Recovering the nutrients from urine and reusing them for agricultural purposes adds resource saving to the benefits. Phosphate can be recovered in the form of struvite (magnesium ammonium phosphate). In this paper, the behaviour of pharmaceuticals an...
Article
Struvite (MgNH(4)PO(4).6H(2)O) precipitation eliminates phosphate efficiently from urine, a small but highly concentrated stream in the total flux of domestic wastewater. Precipitation experiments with hydrolysed urine evaluated the solubility product of struvite. The stored and fully hydrolysed urine had an ionic strength of between 0.33 and 0.56M...
Article
A sulfate-reducing bacterium, strain WW1, was isolated from a thermophilic bioreactor operated at 65 degrees C with methanol as sole energy source in the presence of sulfate. Growth of strain WW1 on methanol or acetate was inhibited at a sulfide concentration of 200 mg l(-1), while on H2/CO2, no apparent inhibition occurred up to a concentration of...
Article
Full-text available
In this article, we study the performance of international water management at Lake Titicaca in order to assess the empirical applicability of a new concept for measuring policy performance. This performance measurement concept (PER) is a function of three variables: optimum performance (OP), actual performance (AP), and counterfactual performance...

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Projects

Projects (5)
Project
PROMISCES stands for Preventing Recalcitrant Organic Mobile Industrial chemicalS for Circular Economy in the Soil-sediment-water system. A number of persistent and often toxic chemicals have found their way into the water cycle. Due to their character they are very hard to remove, therefore getting in the way of the circular water economy. PROMISCES studies behavior, presence and removal options for these 'forever chemicals'.
Project
Overall Project objective: Sustainable productive sanitation options for Kass IDP Camp in order to reduce health risks associated with faecal/oral contamination, and creates newly generated income activity by the recovery of human waste resources in the Kass IDP camp. The project’s specific objectives 1. Inform the experts in the region (WASH staff, and Municipality staff) on outcomes of the MSc research, i.e. applicable sustainable technology options for KASS, following chain approach; covers interface, collection, treatment, and reuse technologies. 2. Facilitating the initiation of sustainable sanitation by providing information about financing opportunities for sustainable sanitation business targeting community entrepreneurs. 3. Initiate local PSS network to advocate for the need clean solution (sanition recycling projects) and to be linked with international sustainable sanitation networks (e.g. SuSanA, WASHWATCH).