Search results for "AIG"
showing 10 items of 918 documents
Discursos leídos ante la Real Academia de la Historia en la recepción pública del Dr. D. Juan Vilanova y Piera el día 29 de Junio de 1889
1889
Inclou: "Contestación del Excmo. Sr. D. Antonio Cánovas del Castillo"
Optimising an outdoor membrane photobioreactor for tertiary sewage treatment
2019
[EN] The operation of an outdoor membrane photobioreactor plant which treated the effluent of an anaerobic membrane bioreactor was optimised. Biomass retention times of 4.5, 6, and 9 days were tested. At a biomass retention time of 4.5 days, maximum nitrogen recovery rate:light irradiance ratios, photosynthetic efficiencies and carbon biofixations of 51.7¿±¿14.3¿mg¿N·mol¿1, 4.4¿±¿1.6% and 0.50¿±¿0.05¿kg CO2·m3influent, respectively, were attained. Minimum membrane fouling rates were achieved when operating at the shortest biomass retention time because of the lower solid concentration and the negligible amount of cyanobacteria and protozoa. Hydraulic retention times of 3.5, 2, and 1.5 days …
Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2−1450
2003
We report on the results of the spectral and timing analysis of a BeppoSAX observation of the microquasar system LS 5039/RX J1826.2-1450. The source was found in a low-flux state with Fx(1-10 keV)= 4.7 x 10^{-12} erg cm^{-2} s^{-1}, which represents almost one order of magnitude lower than a previous RXTE observation 2.5 years before. The 0.1--10 keV spectrum is described by an absorbed power-law continuum with photon-number spectral index Gamma=1.8+-0.2 and hydrogen column density of NH=1.0^{+0.4}_{-0.3} x 10^{22} cm^{-2}. According to the orbital parameters of the system the BeppoSAX observation covers the time of an X-ray eclipse should one occur. However, the 1.6-10 keV light curve does…
Water quality modelling for ephemeral rivers: Model development and parameter assessment
2010
Summary River water quality models can be valuable tools for the assessment and management of receiving water body quality. However, such water quality models require accurate model calibration in order to specify model parameters. Reliable model calibration requires an extensive array of water quality data that are generally rare and resource-intensive, both economically and in terms of human resources, to collect. In the case of small rivers, such data are scarce due to the fact that these rivers are generally considered too insignificant, from a practical and economic viewpoint, to justify the investment of such considerable time and resources. As a consequence, the literature contains v…
Kawalerzysta, dowódca i wykładowca - szkic do biografii gen. bryg. Konstantego Druckiego-Lubeckiego (1893-1940)
2018
Celem przeprowadzonych badań było opracowanie rozszerzonego szkicu biograficznego księcia gen. bryg. Konstantego Druckiego-Lubeckiego. Dzięki zebranym dokumentom i materiałom ustalono najważniejsze fakty z życia generała, dotyczące jego pochodzenia, nauki w Cesarskim Aleksandrowskim Liceum (Lycee Imperial Alexandre) w Petersburgu, udziału w walkach o niepodległość Polski oraz kariery w kawalerii i szkolnictwie wojskowym II RP. Udostępnione przez bliskich księcia materiały, skonfrontowane ze źródłami urzędowymi i dostępnymi publikacjami, pozwoliły także na ustalenie dodatkowych okoliczności związanych z jego śmiercią z rąk NKWD w 1940 roku. Dokumenty te umożliwiły rekonstrukcję podejmowanych…
Improving membrane photobioreactor performance by reducing light path: operating conditions and key performance indicators
2020
[EN] Microalgae cultivation has been receiving increasing interest in wastewater remediation due to their ability to assimilate nutrients present in wastewater streams. In this respect, cultivating microalgae in membrane photobioreactors (MPBRs) allows decoupling the solid retention time (SRT) from the hydraulic retention time (HRT), which enables to increase the nutrient load to the photobioreactors (PBRs) while avoiding the wash out of the microalgae biomass. The reduction of the PBR light path from 25 to 10 cm increased the nitrogen and phosphorus recovery rates, microalgae biomass productivity and photosynthetic efficiency by 150, 103, 194 and 67%, respectively.The areal biomass product…
Nitrite inhibition of microalgae induced by the competition between microalgae and nitrifying bacteria
2020
[EN] Outdoor microalgae cultivation systems treating anaerobic membrane bioreactor (AnMBR) effluents usually present ammonium oxidising bacteria (AOB) competition with microalgae for ammonium uptake, which can cause nitrite accumulation. In literature, nitrite effects over microalgae have shown controversial results. The present study evaluates the nitrite inhibition role in a microalgae-nitrifying bacteria culture. For this purpose, pilot- and lab-scale assays were carried out. During the continuous outdoor operation of the membrane photobioreactor (MPBR) plant, biomass retention time (BRT) of 2 d favoured AOB activity, which caused nitrite accumulation. This nitrite was confirmed to inhib…
Production of microalgal external organic matter in a Chlorella-dominated culture: influence of temperature and stress factors
2020
[EN] Although microalgae are recognised to release external organic matter (EOM), little is known about this phenomenon in microalgae cultivation systems, especially on a large scale. A study on the effect of microalgae-stressing factors such as temperature, nutrient limitation and ammonium oxidising bacteria (AOB) competition in EOM production by microalgae was carried out. The results showed non-statistically significant differences in EOM production at constant temperatures of 25, 30 and 35 degrees C. However, when the temperature was raised from 25 to 35 degrees C for 4 h a day, polysaccharide production increased significantly, indicating microalgae stress. Nutrient limitation also see…
Historia de la adoración y vso de las santas imágenes, y de la imagen de la fuente de la salud ... / Por el Maestro Iayme Prades ...
1596
Sig. [signe]6, A-Ii8, Kk6 Escut reial xil. a la port. - Sols tres grav. xil.: als Preliminars, a la p. 326 (el mateix) i a la p. 369. - Capitals grav. - Ornaments tip. Text amb postil·les marginals. - Reclams
Historia de la adoración y vso de las santas imágenes, y de la imagen de la fuente de la salud ...
Sig. [signe]6, A-Ii8, Kk6 Hi han exemplars exactament iguals amb data d'impr. a la port. 1597 Escut reial xil. a la port. - Sols tres grav. xil.: als Preliminars, a la p. 326 (el mateix) i a la p. 369. - Capitals grav. - Ornaments tip Text amb postil·les marginals. - Reclams