Search results for "Residual"

Intermittent operation of UASB reactors treating wastewater polluted with organic solvents: process performance and microbial community evaluation

2019

The effect of intermittent feeding on the treatment of wastewater polluted with ethanol, ethyl acetate and 1-ethoxy-2-propanol in anaerobic upflow sludge blanket reactors was investigated. Three laboratory-scale reactors, one periodically supplemented with chitosan, were operated in an intermittent pattern (16 hours per day; 5 days per week) during 5 months. Removal efficiencies higher than 94% were obtained at organic loading rates up to 50 kg COD m−3 d−1. The addition of chitosan positively affected the specific methanogenic activity of the granular sludge. Although partial deterioration of the granules was observed, it was not correlated with variations in the production of extracellular…

Edicte, 1572, 01, 23

Títol obtingut de l'epígraf Edicte signat per Don Luis Ferrer Bando sobre prohibición de la siembra de Arroces en la Ciudad de Valencia y lugares de su Termino que se publicava anualmente de orden del Justicia en lo Criminal Text a 1 col. - Reclams Sign.: [ ]2

D. Joseph Antonio Oller, Secretario de Camara del Rey nuestro Señor, y del Acuerdo y Gobierno de esta su Corte y Audiencia, ... : Certifico: Que en d…

Precedeix al text: [creu de Malta Reclams

Dictamen del claustro de Medicina de la Universidad Literaria de Valencia sobre la cria de los arrozes

Caplletra ornada Grav. xil. en port Sign.: A-F2. - Notes a peu de p. - Reclams

Francisco Hilario Cavaller, Escrivano del Rey Nuestro Señor, ... vecino de la Ciudad de Valencia, ... encargado del ramo de Sanidad de Mar y tierra, …

Precedeix al tit.: ✠ Com a tít. el començament del text Sign.: A-K2 Postilles Reclams

Copia de la representacion de la Diputacion de Sanidad de esta Ilustre ciudad de Valencia á la Suprema Junta, con motivo de la epidemia de Tercianas,…

Precedeix al tit.: ✠ Com a tít. el començament del text Sign.: A-B2 Reclams

Table olive wastewater as a potential source of biophenols for valorization : a mini review

2022

The table olive industry generates high amounts of wastewater annually during the alkaline treatment, fermentation, and washing steps of olives. High conductivity and salt content, as well as the high organic and biophenol contents of these waters, is a worldwide problem, especially in the Mediterranean region, which is the major table olive producing area. There is a wide variety of bioactives found in wastewater derived from table olive processing. The main compounds of table olive wastewater, such as those derived from phenolic, hydrocarbon, and sugar fractions, can be recovered and reused. In this review, the table olive manufacturing processes and the volumes and composition of wastewa…

On formations of finite groups with the generalized Wielandt property for residuals II

2018

A formation [Formula: see text] of finite groups has the generalized Wielandt property for residuals, or [Formula: see text] is a GWP-formation, if the [Formula: see text]-residual of a group generated by two [Formula: see text]-subnormal subgroups is the subgroup generated by their [Formula: see text]-residuals. The main result of this paper describes a large family of GWP-formations to further the transparence of this kind of formations, and it can be regarded as a natural step toward the solution of the classification problem.

On a theorem of Berkovich

2002

In a recent paper, Berkovich studied how to describe the nilpotent residual of a group in terms of the nilpotent residuals of some of its subgroups. That study required the knowledge of the structure of the minimal nonnilpotent groups, also called Schmidt groups. The major aim of this paper is to show that this description could be obtained as a consequence of a more complete property, giving birth to some interesting generalizations. This purpose naturally led us to the study of a family of subgroup-closed saturated formations of nilpotent type. An innovative approach to these classes is provided.

An algebraic multigrid based shifted-Laplacian preconditioner for the Helmholtz equation

2007

A preconditioner defined by an algebraic multigrid cycle for a damped Helmholtz operator is proposed for the Helmholtz equation. This approach is well suited for acoustic scattering problems in complicated computational domains and with varying material properties. The spectral properties of the preconditioned systems and the convergence of the GMRES method are studied with linear, quadratic, and cubic finite element discretizations. Numerical experiments are performed with two-dimensional problems describing acoustic scattering in a cross-section of a car cabin and in a layered medium. Asymptotically the number of iterations grows linearly with respect to the frequency while for lower freq…