Microfiltered Digestate to Fertigation: A Best Practice to Improve Water and Energy Efficiency in the Context of Biogasdoneright™

Author(s):  
Paolo Mantovi ◽  
Giuseppe Moscatelli ◽  
Sergio Piccinini ◽  
Stefano Bozzetto ◽  
Lorella Rossi
2018 ◽  
Vol 36 (1) ◽  
pp. 125-131
Author(s):  
Joseph-Alexander Zeitler

Purpose Most of the European apartment blocks are rental units of which the majority needs major refurbishments in upcoming years to achieve climate goals. On the other hand, it is still difficult for property owners to evaluate the profitability of energetic retrofitting investments. The purpose of this paper is to contribute to the situation by forming a standardized framework and tool to calculate profitability of energy efficiency investments throughout Europe. Design/methodology/approach From a European perspective, several different areas of interest (technical, legal, institutional and financial) have been screened to develop an extensive compendium. This has been performed by literature research and several national surveys. Based on these findings, an online-based tool for profitability calculation has been developed to support the decision-making process of each individual, regardless his knowledge on energy efficiency. Findings This paper provides a short overview on main investment barriers in Germany. It is found that both market conditions and information deficits harm energy efficiency investments. Frequently, the decision-making process is found difficult due to inflexible regulations and lack of knowledge. This dramatically reduces market incentives that are already in place. Most often, the investor user dilemma is seen as the main investment obstacle. In this context, transparency and reliability are found to trigger energy-efficient investments. Practical implications Findings are used to identify best practice examples and to assess their transferability to other markets and countries. Innovative solutions have been extracted to improve the overall investment climate. Originality/value The paper contributes to a sound foundation for energy-related investments and the fulfillment of EU reduction targets.


Author(s):  
Stefania De Gregorio

<p>The old age and the poor state of repair of the Italian building heritage and the change in the needs and lifestyle of modern society require re-qualitative interventions of building rehabilitation. These operations are environmentally sustainable, favouring the protection of the soil, allowing the grey energy of the materials that make up the building to be depreciated over a greater number of years and which will have sufficient residual performance, also thanks to integration with other components.</p><p>In order to safeguard the intrinsic sustainability of the rehabilitation of the building, it is necessary to act in the intervention taking into account its sustainability, considering the life cycle of both the building as a whole together with its specific redevelopment project. Sustainability in the management phase is conditioned by energy efficiency; in the construction and demolition phases, however, it is conditioned both by the construction techniques and the connection methods between the different elements of the construction system, and above all by the choice of its components and materials that make it up. The paper presents as an international best practice a dry construction system made with recycled elements derived from scaffolding and a wet construction system consisting of components in lime and hemp.</p>


Heritage ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 2746-2762
Author(s):  
Jørgen Rose ◽  
Kirsten Engelund Thomsen

Historic and heritage buildings present a significant challenge when it comes to reducing energy consumption to mitigate climate change. These buildings need careful renovation, and increasing their energy efficiency is often associated with a high level of complexity, because consideration for heritage values can often reduce and impede possibilities and sometimes even rule out certain improvements completely. Despite these issues, many such renovation projects have already been carried out, and therefore the IEA SHC Task 59 project (Renovating Historic Buildings Towards Zero Energy) in cooperation with Interreg Alpine Space ATLAS has developed a tool for sharing these best-practice examples—the HiBERatlas (Historical Building Energy Retrofit Atlas). The Internet serves as a best-practice database for both individual energy efficiency measures and whole-building renovation projects. This paper presents two of the Danish projects featured in HiBERatlas. The first project, Ryesgade 30, is a Copenhagen apartment building with a preservation-worthy period brick façade. The second project is the Osram Building, a listed Copenhagen office building from 1959 with a protected façade, which today acts as a culture centre. Both renovation projects achieved significant energy savings and consequently CO2-emission reductions, and the indoor climate in both buildings have also improved significantly. Furthermore, a detailed analysis was carried out regarding possible window solutions and ventilation systems in Ryesgade 30, and for the Osram Building regarding daylighting technologies. This paper investigates the two renovation cases through the available measurement and calculation results before and after renovations and demonstrates that it is possible to reduce energy consumption significantly and at the same time improve the indoor climate without compromising the cultural values of buildings.


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