Tjasa Griessler Bulc

Tjasa Griessler Bulc
University of Ljubljana · Faculty of Health Sciences and Faculty of Civil and Geodetic Engineering

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65
Publications
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Publications

Publications (65)
Article
Full-text available
We studied the efficiency of three culture series of the microalgae Phaeodactylum tricornutum (P. tricornutum) and bacteria Thalassospira sp. (axenic microalgae, bacterial culture and co-culture of the two) in removing bisphenols (BPs) from their growth medium. Bacteria were identified by 16S ribosomal RNA polymerase chain reaction (16S rRNA PCR)....
Preprint
Small cellular particles are released into the surroundings of cells and are proposed to play an important role in intercellular communication and consequently the responses of microbial com-munities to environmental stressors. We studied the connection between the small cellular parti-cles and the efficiency of three culture series of the microalg...
Chapter
Aquaponics is an innovative and sustainable food production technology which has the potential to make a significant contribution to twenty-first century food systems, especially if there is an adequately trained workforce. In this chapter we review the efforts of an international consortium to develop a curriculum for teaching the basics of aquapo...
Article
Full-text available
Cities are producers of high quantities of secondary liquid and solid streams that are still poorly utilized within urban systems. In order to tackle this issue, there has been an ever-growing push for more efficient resource management and waste prevention in urban areas, following the concept of a circular economy. This review paper provides a ch...
Article
Full-text available
A framework developed by the COST Action Circular City (an EU-funded network of 500+ scientists from 40+ countries; COST = Cooperation in Science and Technology) for addressing Urban Circularity Challenges (UCCs) with nature-based solutions (NBSs) was analyzed by various urban sectors which refer to different fields of activities for circular manag...
Article
The removal of 18 bisphenols at wastewater relevant concentrations (μg L⁻¹ range) was investigated and compared between Chlorella vulgaris cultures with pH adjusted to 6.8 and pH non-adjusted cultures where pH raised to above 10. Bisphenols with a high partition coefficient (log P > 6) partitioned to biomass soon after spiking, whereas bisphenols w...
Article
Incomplete removal of contaminants of emerging concern (CECs) has been reported for conventional wastewater treatment technologies. Microalgae-based treatment has recently gained interest thanks to simultaneous removal capacity of organic and inorganic compounds and potentially CECs. In this study, a lab-scale monoculture of Chlorella vulgaris and...
Article
Full-text available
High-rate algal ponds (HRAP) are an alternative to conventional wastewater treatment that could contribute to the circular economy by valorising reclaimed water and algal biomass. This short communication presents the removal of nutrients and contaminants of emerging concern (CEC) in a pilot-scale HRAP treating primary municipal wastewater. Average...
Article
Full-text available
Aquaponic food production requires a broad spectrum of knowledge in order to understand and manage the processes involved, and for commercial aquaponics to develop its full potential, it will require an appropriately trained workforce. Devised in collaboration as an Erasmus+ Strategic Partnership for Higher Education, Aqu@teach covers the basics of...
Article
Full-text available
In this study, we examined a Chlorella vulgaris-based system as a potential solution to change liquid waste, such as blackwater, into valuable products for agriculture while protecting waters from pollution without technical demanding pre-treatment. To evaluate the possibility of nutrient removal and biomass production from raw blackwater, four bla...
Preprint
Full-text available
Within the micro and nano world, tiny membrane-enclosed bits of material are more or less free to move and act as communication tools within cells, between cells, between different tissues and between organisms in global environment. Based on the mechanism of membrane budding and vesiculation that includes all types of cells, in this review, we att...
Book
AQU@TEACH is a unique multidisciplinary curriculum for Higher Education. The 15 module Aquaponics Curriculum and the supplementary Entrepreneurial Skills module can be taught either using blended learning or as an instructor-led, cohort-based e-learning course. The Aquaponics Curriculum is intended for tertiary level teachers who want to introduc...
Article
The presence of microplastics (MPs) and their effects have been widely investigated in the aquatic environment, whereas the research done in the terrestrial environment is incomparably lacking. MPs are considered a pollutant in soil on agricultural land, where they can act as a vector for other pollutants, namely organic chemical compounds, such as...
Book
The Entrepreneurial Skills for Aquaponics textbook accompanies the Aqu@teach supplementary module which introduces the main processes involved in developing a business idea into a start-up company – business models, customer segmentation, value proposition, marketing and pricing, and financing.
Article
Full-text available
Our modern cities are resource sinks designed on the current linear economic model which recovers very little of the original input. As the current model is not sustainable, a viable solution is to recover and reuse parts of the input. In this context, resource recovery using nature-based solutions (NBS) is gaining popularity worldwide. In this spe...
Article
This study discusses the influence of six bulking materials (peat, bark, oat husks, sawdust, food waste, and wheat bran) on the composting of blackwater solids (feces, urine and toilet paper) from low flush vacuum toilets (0.8 L/flush). The focus was on faecal indicator reduction, nutrient recycling, and carbon dioxide and methane emissions. In a c...
Article
Full-text available
A lab-scale study imitating microalgae-based wastewater treatment systems was conducted to evaluate the impact of microalgae Chlorella vulgaris on the removal of Escherichia coli from raw blackwater. The study consisted of three tests, each with a different dilution of blackwater: 10%, 30%, and 50% blackwater. A machine-learning method (Decision Tr...
Chapter
Full-text available
This chapter provides an overview of possible strategies for implementing aquaponics in curricula at different levels of education, illustrated by case studies from different countries. Aquaponics can promote scientific literacy and provide a useful tool for teaching the natural sciences at all levels, from primary through to tertiary education. An...
Article
Full-text available
The aim of this study was to identify and quantify faecal indicator bacteria in blackwater collected from a source separation unit and determine the amount of E. coli isolates resistant to antimicrobials and their potential to produce extended spectrum β-lactamases (ESβLs) and metallo-β-lactamases (MβLs), which hydrolyse the most important antibiot...
Article
Full-text available
The use of acoustic cavitation for water and wastewater treatment (cleaning) is a well known procedure. Yet, the use of hydrodynamic cavitation as a sole technique or in combination with other techniques such as ultrasound has only recently been suggested and employed. In the first part of this paper a general overview of techniques that employ hy...
Article
The paper presents the concept of sustainable water resources management in the context of United Nations’ sustainable development goals (UN SDG) and in relation to policies for water resources management in Bulgaria. The natural systems for wastewater treatment are discussed as an example for sustainable management. They could be used without the...
Article
Full-text available
Large concentrations and oscillations of ammonium nitrogen (NH4+-N) in municipal landfill leachate pose considerable constraints to its further treatment in central wastewater treatment plants. The aim of this study was to evaluate and optimize two technologies for the pre-treatment of 600 L/day of landfill leachate: in particular, to optimize thei...
Article
This study presents a novel decentralized sanitary separation system as a zero-discharge solution for blackwater (BW) (faeces, urine and toilet paper) treatment for remote tourist facilities located in sensitive areas. The system operates with low water and energy consumption, enables safe operation and requires low maintenance. The BW was collecte...
Article
An evapotranspirative willow system (EWS) is a zero-discharge wastewater treatment system in which all influent water is used for growing willows and evaporation. Willow clones used in EWS may significantly affect the performance of EWS; therefore, the clones with high biomass production and resilience to permanent flooding, increased nutrient conc...
Article
Full-text available
Aquaponics (AP) is a food production system that combines hydroponic (HP) crop production with recirculating aquaculture. Different types of hydroponic systems have been used for growing crops in aquaponics. However, very few studies have compared their suitability and efficiency in an aquaponic context. The study presented here compares tomato yie...
Article
Full-text available
The use of acoustic cavitation for water and wastewater treatment (cleaning) is a well known procedure. Yet, the use of hydrodynamic cavitation as a sole technique or in combination with other techniques such as ultrasound has only recently been suggested and employed. In the first part of this paper a general overview of techniques that employ hyd...
Article
Full-text available
This paper presents the operation of seven small municipal wastewater treatment plants (WWTP) at mountain huts all over Slovenia. The studied WWTPs were selected as a representative sample based on inventory of all WWTPs of Alpine Association of Slovenia. Performance efficiency of selected WWTPs was carried out on the basis of 20 parameters obtaine...
Article
Full-text available
The aim of this paper is to present a survey on the current status of wastewater treatment systems in 11 central and eastern European (CEE) countries, with a focus on rural areas and on small treatment wetlands for settlements of below 2,000 people. The results indicate that CEE countries have insufficient sanitation systems with different performa...
Article
Full-text available
Treatment performance, fish production, crop plant biomass production, water consumption, and water use efficiency of a pilot aquaponic system for small-scale land-based cyprinid fish farms were evaluated. The system consisted of a 36 m(3) Pond A with an initial carp load of 0.6 kg/m(3); of a treatment chain with a lamellar settler, a roughing filt...
Article
Full-text available
This study assesses the total suspended solids (TSS) retention capacity of different organic filter media for two potential applications: (i) a polishing unit for package treatment plants and (ii) a pretreatment for blackwater from low-flushing toilets. The results showed that the peat filter media used can be significantly improved in terms of str...
Article
Full-text available
Aquaponic is a recirculating food production system where fish and plants are cultivated utilizing natural bacterial cycles which convert fish waste to plant nutrients. This system is environmentally friendly considering the food is produced with low water consumption and without any chemical fertilizers or pesticides. A pilot aquaponic system has...
Article
Full-text available
This study has been carried out to evaluate the treatment performance and fish production of a small-scale cyprinid fish farm with a closed-loop system. The small-scale cyprinid fish farm consisted of a 0.2 m3 experimental fish tank (Tank A) with initial carp load of 1 kg/m3 or 19 juvenile carp (Cyprinus c. carpio L.), a treatment train (TT) consis...
Conference Paper
Full-text available
Certain technological processes in paper, food and textile industries still exhibit high water consumption in spite of significant progress made in recent years. Environmental protection approaches and cost efficient production dictated by the market conditions stimulate the development of new methods and approaches which aim at further reducing wa...
Article
Full-text available
Approximately, 15% of the total textile colorant production is estimated to be lost during dyeing and processing of textile fibres. If left untreated, these wastewaters can represent a serious environmental threat. In the present paper a combination of photocatalytic and biological degradation of prepared textile wastewaters (simulation of real tex...
Article
Full-text available
The versatility and robustness of RIDA®COUNT test plates have been tested in municipal wastewater, and from a decentralised source separation treatment plant, blackwater, grey water and compost derived from blackwater solids. The organic loads where high (BOD5 330-2400 mg/1) with counts of colony-forming units (CFU) exceeding 108 per ml. To observe...
Article
The study presented has been carried out to evaluate the treatment performance, fish production and water consumption of a closed-loop chemical-free water treatment system for small-scale cyprinid fish farms. The closed-loop system consisted of a 36m3 experimental pond (Pond A) with initial carp load of 1kg/m3 (34 Cyprinus c. carpio); of a treatmen...
Article
Full-text available
Vegetated drainage ditches (VDD) as a type of constructed wetland primarily serve to remove and store excess water associated with irrigation and storm events. Current research suggests using a VDD as an additional practice in the mitigation of surface water pollution. The VDD for water treatment of the Glinscica River was constructed in 2006. The...
Article
Current research suggests using vegetated drainage ditch as an additional practice in the mitigation of surface water pollution. The paper discusses the prototype of vegetated drainage system Glinscica (VDSG) composed of a vegetated drainage ditch (VDD) and a new river bed with meanders (RBM). The efficiency of the VDSG, VDD and RBM was evaluated d...
Article
Full-text available
In 2005 and 2006, epiphyton samples were collected from seven lowland and montane peat bogs in Slovenia. Water temperature, pH, conductivity, dissolved oxygen and saturation were measured at the same time. Diatoms, desmids and Cyanobacteria were the most abundand groups in species number. Canonical Correspondence Analysis (CCA) was carried out on C...
Article
Full-text available
Background and Purpose A chemical-free water treatment system consisting of fibre filters ultrasound, and UV for fish farming was operated in a fishpond to study its effect on the control of algae compared with a non-treated fishpond Materials and Methods Phytoplankton and phytobenthos were sampled in both ponds at the same time Chlorophyll-a, nitr...
Article
Full-text available
The study has been carried out to evaluate the efficiency of ultrasound (US) on algae control in a fish pond with closed loop water treatment system for cyprinid fish farms consisting of three water treatment devices: glass fibre filters (GFF), US and UV-C (UV) as compared with those of non-treated fish pond. The results showed that sonication caus...
Article
The results are presented of a 2-year monitoring of the performance of a hybrid constructed wetland (CW), which was created for the treatment of very heterogeneous industrial wastewater (WW) in Slovenia. WW originated from the food-processing department responsible for the production of wine and apple vinegar and from the chemical department in whi...
Article
Ecoremediation (ERM) comprises methods of protection or restoration of the environment by means of natural processes existing in ecosystems. The establishment of ERM systems provides sustainable environmental management solutions that contribute to the preservation of biodiversity and pollution reduction, increase the quality of water and soil, and...
Article
Full-text available
The objective of the present paper was to examine the treatment efficiency of constructed wetlands (CW) for the dye-rich textile wastewater with special focus on colour reduction. Preliminary, a series of dynamic experiments was performed in the CW model packed with gravel, sand, and zeolitic tuff on three synthetically prepared wastewaters using c...
Article
Full-text available
Different wastewaters contain metals that, unlike organic pollutants, are not de-gradable in the biological treatment system. Primary removal mechanisms can be achieved via sorption with a use of effective sorption media and precipitation processes which have been well demonstrated for metal removal also in wetland environment. The aim of the study...
Chapter
Full-text available
Landfilling is expected to remain as a major waste disposal route in the future at least as a means of disposing different wastes that cannot be reused, recycled or burnt. The need for efficient collection and treatment of leachate and landfill gas from municipal solid waste (MSW) landfill sites to avoid emission of greenhouse gases and surface wat...
Article
The constructed wetland (CW) was developed as a pilot integrated system for the capital city's old sanitary landfill site. It consisted of three interconnected beds, two of vertical flow and one of horizontal flow stage. The CW covered 311 m2 with an intermittent hydraulic load of 0.5 cm d−1, filled with sand media and planted with reeds and cattai...
Article
Full-text available
There is a growing interest in the possibilities offered by combinations of waste stabilisation ponds (WSP) and constructed wetlands (CW). The purpose of our study was to compare treatment performances and nutrient cycling in a surface-flow wetland (SFW) and in a WSP treating secondary effluent. In the period between 2000 and 2003, a pilot SFW and...
Article
Full-text available
The most common form of municipal waste disposal in the EU continues to be landfilling, from which leachate could seriously contaminate ground water aquifers that serve as drinking water sources. Constructed wetland is considered as a sustainable option as it facilitates water recycling in landfill sites using closed loop technology. In Slovenia co...
Article
Highways have a long-term impact on the environment, therefore a sustainable approach to their design is vital. In the spring of 2001 a pilot constructed wetland (CW) system was set up at a section of the northeast-southwest motorway in Slovenia. It was designed for a critical flow of 11.75 l/s for 0.75 ha of catchment area. It consisted of a sedim...
Article
Based on data lhat none of the 53 registrated and 60 000 illegal landfill sites in Slovenia is properly structured, the landfill leachate is deemed to be one of lhe most serious pollution problems. A pilot constructed wetland (CW), as an innovative technology lhat provides simple and inexpensive waste water treabnent was introduced for landfill lea...
Article
Based on data that none of the 53 registrated and 60 000 illegal landfill sites in Slovenia is properly structured, the landfill leachate is deemed to be one of the most serious pollution problems. A pilot constructed wetland (CW), as an innovative technology that provides simple and inexpensive waste water treatment was introduced for landfill lea...
Article
The constructed wetland (CW) in Gradišče (Slovenia) has been in operation since 1991 for the purification of waste waters from a food processing plant. It functions according to the method of horizontal subsurface flow. Waste waters are composed of industrial, faecal and meteor waters. The CW is composed of two beds, filled with substrate and plant...
Article
Constructed wetlands proved to be an effective and low-cost technology to control environmental pollution. The introduction of such low-tech systems is supported by the Slovenian Government. The aim of our research project was to intensify the reduction of nutrients (nitrogen compounds mainly) prior to discharging the effluents into the rivers, a c...
Article
Constructed wetlands proved to be an effective and low-cost technology to control environmental pollution. The introduction of such low-tech systems is supported by the Slovenian Government. The aim of our research project was to intensify the reduction of nutrients (nitrogen compounds mainly) prior to discharging the effluents into the rivers, a c...
Article
Full-text available
IZVLEČEK V prispevku je prikazana zasnova raziskave in preliminarni rezultati inovativnega, kompaktnega sistema za čiščenje odpadnih vod po principu »brez odpadka« iz oddaljenih turističnih naselij kot so gorske koče in stavbe na občutljivih obalnih ali kraških območjih. Zanimanje za tovrstni pristop je posledica zahtevnosti predpisov, ki jih moraj...

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Projects

Projects (7)
Archived project
AQU@TEACH was a 30-month Strategic Partnership for Higher Education (2017-1-UK01-KA203-036663) funded by Erasmus+, the European Union’s programme for education, training, youth and sport. The partnership comprised five partners from four countries: University of Greenwich (UK) Zurich University of Applied Sciences (Switzerland) Technical University of Madrid (Spain) University of Ljubljana (Slovenia) Biotechnical Centre Naklo (Slovenia) AQU@TEACH, a unique multidisciplinary curriculum for Higher Education. The 15 module Aquaponics Curriculum and the supplementary Entrepreneurial Skills module can be taught either using blended learning or as an instructor-led, cohort-based e-learning course. The Aquaponics Curriculum is intended for tertiary level teachers who want to introduce basic aquaponics to their students. The student workload for the entire curriculum is 150 hours (5 ECTS). The supplementary Entrepreneurial Skills module (60 hours, 2 ECTS) builds on the knowledge which students will have gained through completing the 15 modules of the Aquaponics Curriculum, and introduces the main processes involved in developing a business idea into a start-up company – business models, customer segmentation, value proposition, marketing and pricing, and financing. The Moodle files, curriculum guides, module guides, textbooks, and associated resources - Teaching Aquaponics: Best Practice Guide and Toolbox of Innovative Didactic Techniques for Higher Education - are freely available on our website: https://aquateach.wordpress.com We hope that you will find these resources useful, and we look forward to receiving your feedback.
Archived project
The main purpose of this project was to examine the nutrients distribution and possible losses in the aquaponic system and to compare biomass production in three different hydroponic sub-systems.