Anaerobic Protein Degradation for Resources Recovery from Nitrogen-Loaded Residual Streams

The demand for reactive nitrogen, i.e., ammonia (NH3), is constantly growing as the global population grows, especially in the nitrogen (N) fertiliser production sector. Simultaneously, the reactive nitrogen in residual streams, i.e., mainly ammonium (NH4+) and nitrate (NO3-), has caused serious environmental issues, e.g., eutrophication and...

A laboratory study on the behavior of estuarine sediment flocculation as function of salinity, EPS and living algae

The interactions between organic and inorganic particles in the context of flocculation is an on-going topic of research. Most current researches do not distinguish between the effects of EPS (produced by microorganisms) and living microorganisms (like algae). In this study, the effect of salinity, EPS and living algae on sediment...

Effect of operational parameters on the performance of an anaerobic sequencing batch reactor (AnSBR) treating protein-rich wastewater

Treating protein-rich wastewater using cost-effective and simple-structured single-stage reactors presents several challenges. In this study, we applied an anaerobic sequencing batch reactor (AnSBR) to treat protein-rich wastewater from a slaughterhouse. We focused on identifying the key factors influencing the removal of chemical oxygen...

Anaerobic protein degradation: Effects of protein structural complexity, protein concentrations, carbohydrates, and volatile fatty acids

Bovine serum albumin (BSA) and casein (CAS) were used in batch tests to compare the protein degradation in the presence and absence of carbohydrates and volatile fatty acids (VFAs). The modified Gompertz model was applied to estimate reaction rates. The results showed that deamination was the rate-limiting step, with a rate ranging between 2...

The Role of Algae in Fine Cohesive Sediment Flocculation

Flocculation is an important process in fine cohesive sediment transport that still requires investigation as it is a complex process, involving the aggregation, break-up and reconformation of mineral and biological particles.<br/>Fine cohesive sediments are found in rivers, estuaries and their adjacent areas. With the rapid economic development...

Characterization of microbial communities in anaerobic acidification reactors fed with casein and/or lactose

Abstract: Protein-rich agro-industrial waste streams are high in organic load and represent a major environmental problem. Anaerobic digestion is an established technology to treat these streams; however, retardation of protein degradation is frequently observed when carbohydrates are present. This study investigated the mechanism of the...

Recovery and applications of ammoniacal nitrogen from nitrogen-loaded residual streams: A review

Total ammoniacal nitrogen (TAN) is considered to be a pollutant, but is also a versatile resource. This review presents an overview of the TAN recovery potentials from nitrogen (N)-loaded residual streams by discussing the sources, recovery technologies and potential applications. The first section of the review addresses the fate of TAN...

Seasonal variation of floc population influenced by the presence of algae in the Changjiang (Yangtze River) Estuary

The variation of the floc population in the Changjiang Estuary has been studied for both winter and summer season as a function of the presence of living (micro)algae. The influence of algae has been characterized through the use of the chlorophyll-a concentration to suspended sediment concentration (CC/SSC) ratio. Two whole tidal cycle...

Distance Metrology with Integrated Mode-Locked Ring Laser

The measurement of distance plays an integral part in many aspects of modern societies. In this paper an integrated mode-locked laser on a chip is used for distance measurement based on mode-resolved interferometry. The emission from the on-chip source with a repetition rate of 2.5 GHz and a spectral bandwidth of 3 nm is coupled into a...

Seasonal variation of sediment flocculation and the modeling thereof as function of biochemical factors

The flocculation process and modelling of suspended sediment transport in estuarine regions is a hot topic in estuarine science[Winterwerp, 1999]. The flocculation is greatly influenced by biochemical parameters[De Lucas Pardo, 2014]. In this paper, we analyse the impact of algae on the processes of flocculation in the Yangtze Estuary, and we...

Shower heat exchanger: Reuse of energy from heated drinking water for CO2 reduction

The heating of drinking water in households contributes significantly to the emission of greenhouse gases. As a water utility aiming to operate at a climate neutral level by 2020, Waternet needs to reduce its CO2 emission by 53?kton?yr?1. To contribute to this ambition, a pilot project was carried out in Uilenstede, Amstelveen, the Netherlands,...

Validation and improvement of the OPTI-VFA sensor for online VFA monitoring