Search results for "AIG"
showing 10 items of 918 documents
A semi-industrial scale AnMBR for municipal wastewater treatment at ambient temperature: performance of the biological process
2022
A semi-industrial scale AnMBR plant was operated for more than 600 days to evaluate the long-term operation of this technology at ambient temperature (ranging from 10 to 27 ºC), variable hydraulic retention times (HRT) (from 25 to 41 h) and influent loads (mostly between 15 and 45 kg COD·d−1). The plant was fed with sulfate-rich high-loaded municipal wastewater from the pre-treatment of a full-scale WWTP. The results showed promising AnMBR performance as the core technology for wastewater treatment, obtaining an average 87.2 ± 6.1 % COD removal during long-term operation, with 40 % of the data over 90%. Five periods were considered to evaluate the effect of HRT, influent characteristics, CO…
Alfalfa crops amended with MSW compost can compensate the effect of salty water irrigation depending on the soil texture
2018
The availability of water resources of marginal quality such as drainage water or high-saltcontaining groundwater is turning into an important issue in Tunisia and other countrieswith scarce water resources. A pot experiment was carried out to evaluate plant produc-tion, nutrient content and heavy metal bioaccumulation in agricultural soils amended withMSW compost and irrigated with salty water, by using two different soil textures (clay andsandy). Salt water supply decreased plant dry yield in both soils. Salt stress had signifi-cantly reduction in plant biomass in sandy soil compared to those in clay soil (biomass ofdry weight is significantly higher in clay soil than those in sandy soil …
Sewage sludge management for phosphorus recovery as struvite in EBPR wastewater treatment plants
2008
The influence of separate and mixed thickening of primary and secondary sludge on struvite recovery was studied. Phosphorus precipitation in the digester was reduced from 13.7 g of phosphorus per kg of treated sludge in the separate thickening experiment to 5.9 in the mixed thickening experiment. This lessening of the uncontrolled precipitation means a reduction of the operational problems and enhances the phosphorus availability for its later crystallization. High phosphorus precipitation and recovery efficiencies were achieved in both crystallization experiments. However, mixed thickening configuration showed a lower percentage of phosphorus precipitated as struvite due to the presence of…
Optimisation of sludge line management to enhance phosphorus recovery in WWTP
2008
The management of the sludge treatment line can be optimized to reduce uncontrolled phosphorus precipitation in the anaerobic digester and to enhance phosphorus recovery in WWTP. In this paper, four operational strategies, which are based on the handling of the prefermented primary sludge and the secondary sludge from an EBPR process, have been tested in a pilot plant. The separated or mixed sludge thickening, the use of a stirred contact tank and the elutriation of the thickened sludge are the main strategies studied. Both the reduction of phosphorus precipitation in the digester and the supernatant suitability for a struvite crystallization process were assessed in each configuration. The…
The Role of Equity Crowdfunding Campaigns in Shaping Firm Innovativeness: Evidence from Italy
2023
PurposeThis paper aims to contribute to the scientific debate concerning the impact of equity crowdfunding on the performance of crowdfunded firms after campaigning. To this aim, the purpose of this paper is to investigate the relationship between the characteristics of the campaign and the subsequent firm innovativeness.Design/methodology/approachThis study adopts a quantitative research approach to evaluate if the entrepreneurial choices affecting the characteristics of the equity crowdfunding campaigns have an impact on the post-campaign firm innovativeness.FindingsThe results of the models show that the campaign characteristics have a direct impact on the firm innovativeness, both in te…
The image of the candidates in the 2019 General Elections in Spain
2019
[Resumen] Las Elecciones Generales de 1977 en España obligaron a los partidos a explicar cuestiones elementales como “qué significaba votar”. En general, la imagen proyectada de los candidatos era una cuestión “menor”, dada la falta de cultura democrática del momento. Tras 42 años desde la transición, el contexto político y comunicativo ha dado un vuelco que exige de una aproximación más compleja. Los partidos políticos son conscientes de la importancia que tiene construir la imagen pública de sus candidatos. En este trabajo analizamos la imagen del principal cartel de campaña de los candidatos a presidente en las Elecciones Generales de abril de 2019 de Vox, PP, C’s, PSOE, UP y del candida…
El teólogo democrático ahogado en las angélicas fuentes, ó Respuesta del Maestro Fray Felipe Puigserver... a la segunda parte del que se tituló El to…
L’afebliment de l’Estat del Benestar
2018
Con autorización de la revista para autores CSIC.
Mixotrophy in Pyroleae (Ericaceae) from Estonian boreal forests does not vary with light or tissue age
2017
SPE IPM UB; International audience; In temperate forests, some green plants, namely pyroloids (Pyroleae, Ericaceae) and some orchids, independently evolved a mode of nutrition mixing photosynthates and carbon gained from their mycorrhizal fungi (mixotrophy). Fungal carbon is more enriched in 13C than photosynthates, allowing estimation of the proportion of carbon acquired heterotrophically from fungi in plant biomass. Based on 13C enrichment, mixotrophic orchids have previously been shown to increase shoot autotrophy level over the growth season and with environmental light availability. But little is known about the plasticity of use of photosynthetic versus fungal carbon in pyroloids. Met…
Tavoitteena vahva ja yhtenäinen kansa : historia ja kieli kansallisen identiteetin rakentamisen välineinä Pätsin aikakauden Virossa 1934-1940
2018
In this dissertation, I study national campaigns aimed at constructing Estonian national identity in 1934–1940. The campaigns were organized through the cooperation of Konstantin Päts’ authoritarian government and civil society. I focus on the folk art campaign and on the name changing campaign. The name changing campaign was the largest national project in Estonia, aiming at the Estonification of names. Initially, the campaign focused on changing individuals’ surnames and first names, but later also on changing the names of places, streets and properties. The name changing campaign had history political and language political dimensions. Through the folk art campaign, the state tried to af…