Luz Alejo

Technical University of Darmstadt | TU · Department of Civil and Environmental Engineering Sciences (Dept.13)

Computational self-adapting methods (Support Vector Machines, SVM) are compared with an analytical method in effluent composition prediction of a two-stage anaerobic digestion (AD) process. Experimental data for the AD of poultry manure were used. The analytical method considers the protein as the only source of ammonia production in AD after degra...

In this work, clustering analysis of two partial nitritation-anammox (PN-A) moving bed biofilm reactors (MBBR) containing different types of carrier material was explored for the identification of patterns and operational conditions that may benefit the process performance. The systems ran for two years under fluctuations of temperature and organic...

Higher standards in the European water framework directive and national directive demand advanced wastewater treatment for removal of nutrients and organic micropollutants before the discharge into water bodies. Systematic investigations regarding relative dosage and filtration processes for removal of flocculated solids are currently lacking. In t...

Mechanistic modelling of phosphorus removal in tertiary treatment through solubility equilibrium models, adsorption models and chemical precipitation are highly dependent on the wastewater composition of dissolved and particulate water constituents. Moreover, modelling very low levels of phosphorus (< 0.2 mg L-1) through these models is challenging...

Traditional lignin pyrolysis generates a bio-oil with a complex mixture of alkyl-functionalized guaiacol and syringol monomers that have limited utility to completely replace phenol in resins. In this work, formate assisted fast pyrolysis (FAsP) of lignin yielded a bio-oil consisting of alkylated phenol compounds, due to deoxyhydrogenation, that wa...

Higher standards in the european water framework directive and national directive demand advanced waste water treatment for removal of nutrients and organic micropollutants before discharge into water bodies. Systematic investigations regarding relative dosage and filtration processes for removal of flocculated solids are currently lacking. In this...

An innovative approach to discover relevant and actionable variables in systems for nitrogen removal is proposed. Clustering analysis of two partial nitritation-anammox moving bed biofilm reactors containing different types of carriers allowed the identification of hidden patterns. These systems operated for two years under fluctuations of temperat...

Advanced phosphorus removal to extremely low levels and synergy effects of cloth and membrane filtration as post filtration processes in wastewater treatment In the course of growing on the effluent quality of municipal wastewater treatment plants the advanced phosphorus removal to extremely low levels is gaining increasing importance. Systematic i...

The original publication of this paper contains a mistake. Unfortunately, an author was inadvertently missed out, Constanza Arriagada had participated in the operation of the anaerobic digesters cited in the work and now as a PhD student, she is involved in the production of other publication.

Poultry manure contains high levels of ammonia, which result in a suboptimal bioconversion to methane in anaerobic digesters (AD). A simultaneous process of nitrification, Anammox and denitrification (SNAD) in a continuous granular bubble column reactor to treat the anaerobically digested poultry manure was implemented. Thus, two strategies to achi...

The economical feasibility and optimization of a full-scale process for the treatment of poultry manure with a coupled anaerobic digestion (AD)-nitrogen removal using anaerobic ammonia oxidation and recycle of the final effluent was developed. A total ammonia nitrogen (TAN) balance allowed obtaining volume and cost objective functions expressed in...

A full-scale process for the treatment of 80 tons per day of poultry manure was designed and optimized. A total ammonia nitrogen (TAN) balance was performed at steady state, considering the stoichiometry and the kinetic data from the anaerobic digestion and the anaerobic ammonia oxidation. The equipment, reactor design, investment costs, and operat...