Uso potencial de ceniza de lodo de depuradora como sustitución de árido fino en bloques de hormigón prefabricados

El presente artículo se centra en la valorización de las cenizas de lodo de depuradora adicionadas en bloques de hormigón prefabricados, por tanto, en una matriz a base de cemento Portland con características particulares (consistencia seca). Se realiza una experiencia piloto mediante la fabricación de bloques en una planta industrial local, utilizando mezclas con porcentajes de sustitución de árido fino del 5, 10 y 15% por cenizas de lodo de depuradora, cuyos resultados se compararán con bloques de referencia (sin adición). Los ensayos aplicados son los preceptivos para su comercialización según normativa europea (marcado CE), lo que permitirá igualmente comprobar las características físicas y mecánicas de los hormigones. Los resultados obtenidos son prometedores: la utilización de este residuo permitiría su comercialización, mejora características de los bloques como la resistencia a compresión, y permitiría reducir un gran volumen de material utilizado habitualmente como materia prima y consumir un residuo destinado a vertedero.

Presence of Siloxanes in the Biogas of a Wastewater Treatment Plant Separation in Condensates and Influence of the Dose of Iron Chloride on its Elimination

The siloxanes present in the biogas produced during anaerobic digestion damage the mechanism of cogeneration equipment and, consequently, negatively affect the energy valorization process. For this reason, the detection and elimination of these silicon-derived chemical compounds are a priority in the management of cogeneration facilities. In this regard, the objectives of this paper are, firstly, to characterize the siloxanes in the biogas and, secondly, to qualitatively evaluate the influence of the dose of iron chloride on its elimination. The research was performed at the Rincón de León Wastewater Treatment Plant (Alicante, Spain). The outflow biogas of the digesters and of the pressurized gasometers was sampled and analyzed. The results obtained made it possible to demonstrate, firstly, the absence of linear siloxanes and that, of the cyclic siloxanes, the predominant type was decamethylcyclopentasiloxane, and, secondly, that the addition of iron chloride in the digesters significantly reduces the siloxane content in the biogas. Additionally, it was demonstrated that the process of compression of the biogas, with the elimination of condensates, also produces significant reductions in the concentration of siloxanes in the biogas.

Fate of priority pollutants in publicly owned treatment works : pilot study /

Mode of access: Internet.

Effects of liquid detergent plant effluent on the rotating biological contactor /

Mode of access: Internet.

Beneficial disposal of water purification plant sludges in wastewater treatment /

Mode of access: Internet.

Safety evaluation of renovated wastewater from a poultry processing plant /

"Grant nos. R804286 & S803325."

Resource recovery plant cost estimates : a comparative evaluation of four recent dry-shredding designs /

Bibliography: p. 20.

Resource recovery plant implementation : guides for municipal officials

157.1. Planning and overview.--157.2. Technologies.--157.3. Markets.--157.5. Procurement.--157.6. Accounting format.--157.7. Risks and contracts.

Resource recovery plant implementation : guides for municipal officials : interim report /

Mode of access: Internet.

Isolation thicknesses of water for UO₂F₂ solution systems /

Previously published data was used for an empirical study of critical arrays of slab and cylindrically shaped vessels interacting through water. These vessels contained an aqueous solution of UO₂F₂ and the U²³⁵ isotopic enrichment was greater than 90%. Approximate isolation thicknesses of water for each of the above two cases is given.

Evaluation of solid waste baling and balefills : volumes I and II.

Item 431-I-7

Accumulation and cycling of organic matter and chemical constituents during early vegetational succession on a radioactive waste disposal area /

Includes bibliography.

Resource recovery plant implementation : guides for municipal officials /

Includes footnotes.

Gainesville compost plant : an interim report /

Interim reports.

Public health assessment, Mohonk Road Industrial Plant site, High Falls, Ulster County, New York /

"February 1, 2001; Cerclis No. NYD986950012."