Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal.

Energy efficiency (EE) depends mainly on the lower heating values (LHVs) of hydrogen and methane selected from the thermodynamics tables under ideal conditions. However, for practical applications, the heating value should be calculated by considering some environmental factors under real conditions. Accordingly, this study compared EE using the ideal LHV with the EE using the real LHV in a two-phase anaerobic digestion reactor treating synthetic wastewater. Additionally, the process performance and the stability were studied. The results showed that the EE value calculated using LHVideal was, on average, 35% higher than that evaluated using LHVreal; these differences are relevant to the estimation of real energy and also for practical applications. At the same time, the index buffer intermediate alkalinity/partial alkalinity was shown to be more accurate than the pH value to analyze the stability of the process. With regards to chemical oxygen demand, the removal efficiency in the methanogenic phase decreased drastically when utilizing 100% of the acidogenic phase. Future considerations for the optimization of each phase are highlighted.

Modelling of surface river plume using set-up and input data files of Delft-3D model.

This data article presents set-up and input data files to model a surface river plume through curvilinear nested grid in double-way mode. The hydrodynamic modelling in river deltas with intense transport processes and complex bathymetry such as the Magdalena River delta, requires a mesh grid that ease the natural river discharge into the ocean. The aforementioned may be challenging due to the numerical scheme and stability restrictions of the numerical models that difficult having efficient and effective validated simulations. This dataset files are a reference to perform analysis of the hydrodynamic river deltas, meaningful for optimizing time and resources, easing the planning of measurement campaigns what reduce risks of the personnel and instrumentation during equipment deployment and field work .The application of the set-up and input data files of this data article is shown in Rueda-Bayona et al. [1].

Ecotoxicity and genetic toxicity data from a pulp mill bleaching effluent treated with anaerobic digestion and advanced oxidation process (AOP).

Wastewater treatment contributes to environmental sustainable development indicators such as clean water and sanitation, then, is imperative to improve the mechanisms and process of contaminant removals. The sewage and industrial effluents are the major contributors of pollutants in land and water discharges, and are necessary to enrich the available data for having reference parameters for plant designing and optimization. The physical andchemical assays alone could not be considered sufficient to assess properly the plant performance because complex mixtures demand ecological and biological parameters for a holistic evaluation. Hence, the ecotoxicity and the genetic toxicity measurement become an important tool to complement the conventional water quality parameters, but these parameters are not widely reported in the open access literature. Despite of several studies showed ecotoxicity and the genetic toxicity data, these could be considered not sufficient because the resulted information is derived from single compounds. Considering the scarce data mentioned above this article presents data on the genetic an ecological toxicity of an anaerobic effluent post-treated with ozone and ozone/UV generated by Chaparro et al. [1] and Chaparro and Pires [2].