CEST Proceedings are published under the ISSN 2944-9820.
Extraction of Oil from Spent Grounds Coffee using Ultrasound as Pre-Extraction Method
(Corresponding) Cubas A., Hermmann K., Bianchet R., Moecke E.
Topic:
Food waste
The treatment and processing of coffee annually produces a large volume of biological waste, which contributes to environmental pollution, it is estimated that coffee production generates approx. 6 million tonnes of spent coffee grounds per year in the world (GETACHEW and CHUN, 2017). Thus, the...Read more
Keywords:
Spent ground coffee; biological waste; ultrasound method; oil from coffee
Innovative methods of ground improvement for problematic transport earthwork materials
(Corresponding) Mavroulidou M., Safdar M., Gunn M., Gray C., Payne I., Garelick J., Purchase D.
Topic:
Environmental management and policies
The paper focuses on emerging (bio-) chemical techniques used to improve engineering properties of two problematic earthwork materials of the UK rail network to address transport earthwork infrastructure resilience in view of climate change. Studied techniques include novel cementing agents (e.g...Read more
A comparative study of alkali activated slag cement concretes with carbonate and silicate activators.
Sanam I., (Corresponding) Mavroulidou M.
Topic:
Environmental management and policies
Alkali-activated cements are increasingly gaining interest as viable alternatives to Portland cement, because they are considerably reducing CO2 emissions compared to traditional Portland cements while maintaining or exceeding performance requirements commonly specified for construction...Read more
A comparative assessment of alkali-activated stabilisers including waste materials, for the treatment of swelling-shrinking soils
(Corresponding) Mavroulidou M., Gray C., Gunn M.
Topic:
Solid waste management
Swelling-shrinking soils (also known as expansive soils) experience very considerable volume changes upon changes in moisture content, thus causing major damages to lightweight structures, pavements, slopes and utilities. To counteract this problem chemical stabilisation of this type of soil with...Read more
Keywords:
chemical ground improvement; alkali-activated cements; ground granulated blast furnace slag; paper sludge ash; solid waste management
Penetration of tritium into ground water in the Czech Republic
(Corresponding) Juranová E., Sedlářová B., Marešová D., Pohlová I.
Topic:
Environmental data analysis and modelling
Tritium (3H), the radioactive hydrogen, can form naturally by interaction of the cosmic radiation with the atmosphere, or it can be produced by human activities. In recent, tritium occurs distributed in environment in low concentrations, which means no significant health risk, but it can be used...Read more
A study of the properties of alkali activated cement concrete with potassium carbonate activator.
(Corresponding) Mavroulidou M.
Topic:
Net Zero emission transition
Alkali-activated cements (AAC) have recently attracted the vivid interest of the civil engineering industry as promising innovative alternatives to Portland Cement (PC) which is responsible for 8% of anthropogenic CO2 emissions. In this context, this paper studies concrete produced using potassium...Read more
Use of food waste as culture media in biocementation for ground improvement applications
Mwandira W., (Corresponding) Mavroulidou M., Gunn M., Gray C.
Topic:
CIRCULAR ECONOMY AND BIOECONOMY
The paper investigates the use of mixed fruit and vegetable (FV) waste to extract liquid to grow bacteria. The bacteria will be used to induce biocementation of soils and two metabolic pathways are examined. These are the ureolytic pathway and the carbonic anhydrase pathway (which absorbs CO2)...Read more
Keywords:
GROUND IMPROVEMENT; FRUIT AND VEGETABLE; BIOCEMENTS; FOOD WASTE MANAGEMENT
Safdar M., (Corresponding) Mavroulidou M., Gunn M., Garelick J.
Topic:
Net Zero emission transition
Biocementation (i.e., the production of biomimetic cement through the metabolic activity of microorganisms) has attracted the vivid interest of researchers worldwide in the last decade. To date most research works and commercial products proposed biocementation using the urea hydrolysis metabolic...Read more
