- document
-
Prot, T.J.F. (author), Pannekoek, W. (author), Belloni, C. (author), Dugulan, A.I. (author), Hendrikx, R.W.A. (author), Korving, L. (author), van Loosdrecht, Mark C.M. (author)It was recently discovered that vivianite (Fe<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O) could be magnetically extracted from digested activated sludge which opened a new route for phosphorus recovery (Wijdeveld et al. 2022). While its formation in digested sludge is regularly reported, it is not yet studied for fresh,...journal article 2022
- document
-
Hao, Xiaodi (author), Wu, Daoqi (author), Li, Ji (author), Liu, Ranbin (author), van Loosdrecht, Mark C.M. (author)Entropy is a concept defined by the second law of thermodynamics. Applying this concept to the world we live in, entropy production must be minimized and negentropy (negative entropy production) should be accelerated, in order to produce a healthy and stable ecological system. The present wastewater treatment, however, contributes to entropy...journal article 2022
- document
-
Tomas Martinez, S. (author), Chen, L.M. (author), Neu, Thomas R. (author), Weissbrodt, D.G. (author), van Loosdrecht, Mark C.M. (author), Lin, Y. (author)Sialic acids are a family of nine-carbon negatively charged carbohydrates. In animals, they are abundant on mucosa surfaces as terminal carbohydrates of mucin glycoproteins. Some commensal and pathogenic bacteria are able to release, take up and catabolize sialic acids. Recently, sialic acids have been discovered to be widespread among most...journal article 2022
- document
-
Hao, Xiaodi (author), Yu, W. (author), Yuan, Tugui (author), Wu, Yuanyuan (author), van Loosdrecht, Mark C.M. (author)As a product of phosphorous recovery from anaerobic digestion (AD) of waste activated sludge (WAS), vivianite has received increasing attention. However, key factors controlling vivianite formation have not yet been fully addressed. Thus, this study was initiated to ascertain key factors controlling vivianite formation. A simulation of...journal article 2022
- document
-
van Dijk, E.J.H. (author), Haaksman, V.A. (author), van Loosdrecht, Mark C.M. (author), Pronk, M. (author)In this study a mathematical framework was developed to describe aerobic granulation based on 6 main mechanisms: microbial selection, selective wasting, maximizing transport of substrate into the biofilm, selective feeding, substrate type and breakage. A numerical model was developed using four main components; a 1D convection/dispersion...journal article 2022
- document
-
Kim, Nam Kyeun (author), Lin, Richard (author), Bhattacharyya, Debes (author), van Loosdrecht, Mark C.M. (author), Lin, Y. (author)Eco-friendly flame retardants are greatly required to meet the expectations of low-toxicity, environmental compatibility and sustainability. Extracellular polymeric substances (EPS), the biopolymers recovered from excess granular wastewater sludge, have been successfully incorporated into poly(vinyl alcohol) (PVA) by a solution casting method...journal article 2022
- document
-
Kouba, V. (author), D, Vejmelkova (author), E, Zwolsman (author), K, Hurkova (author), K, Navratilova (author), M, Laureni (author), Pabst, Martin (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author)Anammox bacteria enable efficient removal of nitrogen from sewage in processes involving partial nitritation and anammox (PN/A) or nitrification, partial denitrification, and anammox (N-PdN/A). In mild climates, anammox bacteria must be adapted to ≤15 °C, typically by gradual temperature decrease; however, this takes months or years. To...journal article 2022
- document
-
van den Berg, L. (author), Pronk, M. (author), van Loosdrecht, Mark C.M. (author), de Kreuk, M.K. (author)Granular sludge processes are frequently used in domestic and industrial wastewater treatment. The granule buoyant density and biomass density are important parameters for the design and operation of granular sludge reactors. Different methods to measure the granule density include the pycnometer method, the Percoll density gradient method,...journal article 2022
- document
-
Li, Ji (author), Hao, Xiaodi (author), Gan, W. (author), van Loosdrecht, Mark C.M. (author), Wu, Yuanyuan (author)Alginate like extracellular polymers (ALE) recovered from flocculent sludge has been identified as a kind of highly valuable biomaterials. However, the extraction protocols limit the production of biopolymers as ALE extracted from flocculent sludge is at a lower level, around 90–190 mg/g VSS. Under this circumstance, the eco-friendly and...journal article 2022
- document
-
Culcasi, A. (author), Ktori, R. (author), Pellegrino, A. (author), Rodriguez Pascual, M. (author), van Loosdrecht, Mark C.M. (author), Tamburini, A. (author), Cipollina, A. (author), Xevgenos, Dimitris (author), Micale, G. (author)European policy encourages the adoption of sustainable systems that promote the efficient use and recovery of minerals and chemicals. In this respect, desalination brines do contain a dramatic amount of valuable minerals and can be valorized through appropriate treatments rather than releasing them into the environment. This paper proposes an...journal article 2022
- document
-
de Bruin, S. (author), Vasquez Cardenas, D. (author), Sarbu, S. M. (author), Meysman, F.J.R. (author), Sousa, D. Z. (author), van Loosdrecht, Mark C.M. (author), Lin, Y. (author)Sulfated glycosaminoglycans (sGAG) are negatively charged extracellular polymeric substances that occur in biofilms from various environments. Yet, it remains unclear whether these polymers are acquired from the external environment or produced by microbes in the biofilm. To resolve this, we analyzed the presence of sGAGs in samples of an...journal article 2022
- document
-
Kouba, V. (author), Bachmannová, Ch (author), Podzimek, T. (author), Lipovová, P. (author), van Loosdrecht, Mark C.M. (author)The adaptation of bacteria involved in the anaerobic ammonium oxidation (anammox) to low temperatures in the mainstream of WWTP will unlock substantial treatment savings. However, their adaptation mechanisms have begun to be revealed only very recently. This study reviewed the state-of-the-art knowledge on these mechanisms from -omics studies...review 2022
- document
-
Li, Ji (author), Hao, Xiaodi (author), Gan, Wei (author), van Loosdrecht, Mark C.M. (author), Wu, Yuanyuan (author)Alginate like extracellular polymers (ALE) recovered from excess sludge have been evaluated as an eco-friendly, cost effective and sustainable alternative to highly valued materials. However, the ALE extraction from flocculent sludge ranges normally from 90 to 190 mg/g VSS, which is only equivalent to the lowest edge of the ALE production...journal article 2022
- document
-
Prot, T.J.F. (author), Korving, L. (author), Dugulan, A.I. (author), Goubitz, K. (author), van Loosdrecht, Mark C.M. (author)The presence of soluble iron and phosphorus in wastewater sludge can lead to vivianite scaling. This problem is not often reported in literature, most likely due to the difficult identification and quantification of this mineral. It is usually present as a hard and blue deposit that can also be brown or black depending on its composition and...journal article 2021
- document
-
Kehrein, P.A. (author), Jafari Eshlaghi, M. (author), Slagt, Marc (author), Cornelissen, Emile (author), Osseweijer, P. (author), Posada Duque, J.A. (author), van Loosdrecht, Mark C.M. (author)The objective of this paper is to compare, under Dutch market conditions, the energy consumption and net costs of membrane-based advanced treatment processes for three water reuse types (i.e. potable, industrial, agricultural reuse). The water source is municipal waste-water treatment plant effluent. Results indicate that the application of...journal article 2021
- document
-
Pallares Vega, R. (author), Macedo, Gonçalo (author), Brouwer, Michael S.M. (author), Hernandez Leal, Lucia (author), van der Maas, Peter (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author), Heederik, Dick (author), Mevius, Dik (author), Schmitt, Heike (author)Plasmid-mediated dissemination of antibiotic resistance among fecal Enterobacteriaceae in natural ecosystems may contribute to the persistence of antibiotic resistance genes in anthropogenically impacted environments. Plasmid transfer frequencies measured under laboratory conditions might lead to overestimation of plasmid transfer potential...journal article 2021
- document
-
Pallares Vega, R. (author), Hernandez Leal, Lucia (author), Fletcher, Benjamin N. (author), Vias-Torres, Eduardo (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author), Schmitt, Heike (author)The occurrence and removal patterns of 24 antimicrobial agents and antimicrobial resistant determinants namely 6 antibiotic resistance genes (ARGs) and 2 mobile genetic elements (MGEs), and the fecal indicator E. coli were investigated in three full-scale wastewater treatment plants. Their waterlines and biosolids lines (including secondary...journal article 2021
- document
-
Soler Jofra, A. (author), Pérez, Julio (author), van Loosdrecht, Mark C.M. (author)Aerobic ammonium oxidizing bacteria were first isolated more than 100 years ago and hydroxylamine is known to be an intermediate. The enzymatic steps involving hydroxylamine conversion to nitrite are still under discussion. For a long time it was assumed that hydroxylamine was directly converted to nitrite by a hydroxylamine oxidoreductase....review 2021
- document
-
Pereira Espíndola, S. (author), Pronk, M. (author), Zlopasa, J. (author), Picken, S.J. (author), van Loosdrecht, Mark C.M. (author)Wastewater solids could be an attractive source of secondary raw cellulose, mainly originating from toilet paper. Cellulose can be recovered through sieving of raw wastewater, return sludge, or excess sludge. In particular, a large fraction of cellulose (13–15%) can be found in the excess sludge of the aerobic granular sludge produced by the...journal article 2021
- document
-
Pfaff, N.M. (author), Kleijn, J. Mieke (author), van Loosdrecht, Mark C.M. (author), Kemperman, Antoine J.B. (author)The properties of biofilm EPS are determined by the multiple interactions between its constituents and the surrounding environment. Because of the high complexity of biofilm EPS, its constituents' characterisation is still far from thorough, and identification of these interactions cannot be done yet. Therefore, we use gels of bacterial...journal article 2021