Nitrogen and phosphorus budgets were compiled for the littoral (29 km2) and pelagic (329 km2) of ancient, deep, clear, and hard water Lake Ohrid (Albania and North Macedonia), to assess the importance of the littoral in nutrient retention. P originates mainly from domestic point sources (73%), for N this is karst seepage (50%). Total littoral loads are estimated at 1700 kg P and 23,200 kg N km-2 (area of littoral) yr-1; net littoral retention is 31% ± 13% for P and 40% ± 16% for N, largely in the dense charophyte belt. P retention is mainly due to detritus burial, but also due to coprecipitation; N retention is due to both detritus burial and denitrification. A Monte Carlo plausibility analysis balanced the budget by increasing nonconnected domestic household inputs (from 20% to 27% of external load), and decreasing pelagic sediment P burial by 27% and littoral denitrification by 25%. Scenario projections for 2100 corresponding to SRES A2 and B1 were linked to an AQUASIM lake ecosystem model. Under B1, the changes were small compared to the present. A2, however, led to a major reduction in precipitation, an increase in evapotranspiration, a reduction in river outflow (to ~20%), a doubling in P-loading, a drop in lake level of ~1.5 m, and a decline in the extent of the charophyte belt. Areal loading of the littoral would increase accordingly, but water transparency would not decline much. Also, the littoral vegetation will witness a shift in species composition, and an increase in filamentous Cladophora cover.

Combined sewer overflows (CSOs) are of major environmental concern for impacted surface waterbodies. In the last decades, major storm events have become increasingly regular in some areas, and meteorological scenarios predict a further rise in their frequency. Consequently, control and treatment of CSOs with respect to best practice examples, innovative treatment solutions, and management of sewer systems are an inevitable necessity. As a result, the number of publications concerning quality, quantity, and type of treatments has recently increased. This review therefore aims to provide a critical overview on the effects, control, and treatment of CSOs in terms of impact on the environment and public health, strict measures addressed by regulations, and the various treatment alternatives including natural and compact treatments. Drawing together the previous studies, an innovative treatment and control guideline are also proposed for the better management practices.

Wie können unsere Kommunen die Möglichkeiten, die Regenwasserbewirtschaftung und neuartige Wasserinfrastrukturen als auch blau-grüne Infrastrukturen bieten, gut in ihre Planungsprozesse integrieren? Wie können die Leistungen der einzelnen Maßnahmen schnell, einfach und gut im Rahmen von Planungsworkshops mit Fachakteuren und Laien kommuniziert und genutzt werden? Hierzu wurden im Forschungsprojekt netWORKS 4 sogenannte Infokarten zu 20 Infrastrukturbausteinen als partizipatives Planungstool entwickelt und in verschiedenen Workshops erprobt. Sie sind nun als frei verfügbares Tool kostenlos zugänglich.

Durch die Klärschlammverordnung (AbfKlärV) wird die Phosphor(P)-Rückgewinnung aus Klärschlämmen bzw. Klärschlammaschen für Klärwerke mit einer genehmigten Ausbaugröße ab 100.000 Einwohnerwerten (EW) ab dem Kalenderjahr 2029 gesetzlich vorgeschrieben. Dies betrifft alle sechs Klärwerke, welche von den Berliner Wasserbetrieben (BWB) betrieben werden. Die vorliegende Studie diskutiert verschiedene Möglichkeiten der Phosphorrückgewinnung mit Blick auf die Vorgaben der AbfKlärV, die Wirtschaftlichkeit der verschiedenen Ansätze und dient den BWB als Konzeptpapier für eine weitergehende Planung Ihrer Strategie zur P-Rückgewinnung.

Circular Agronomics, aims to foster the transition from a linear economy to a circular economy. Therefore, this deliverable focuses on circular solutions for waste and wastewaters originating from the food industry. In 2019, the “Best Available Techniques (BAT) Reference Document for the Food, Drink and Milk Industries” (BREF-document) was published by the European Commission. Based on that, the deliverable summarizes the state of the art of the technologies already in use and concludes their suitability for circular economy solutions. In Circular Agronomics, new technologies for the recovery of carbon, nitrogen, phosphorus and potassium are developed and investigated. So far, those technologies are not included in the BREF-document yet. Therefore, the concepts of the technologies are introduced in the deliverable. For a potential integration of those technologies in the BREF-document, the technologies are described in detail in the annex according to the required structure in the BREF-document. However, since the technologies are still under development, those descriptions are considered as a first draft. The authors suggest to update those descriptions at a later stage of the project prior to their potential integration in the BREF-document. Referring to the goal to recover carbon and nutrients, the deliverable presents a detailed characterization of the waste and wastewaters originating from the food industries. Based on that, the five most promising waste and wastewater streams regarding carbon recovery, nitrogen recovery, phosphorus recovery and potassium recovery were selected. For those streams and the corresponding recovery technologies four new concepts are suggested in the deliverable. In order to show the technology providers an overview of potential clients for their technologies and for those concepts, for each selected industry, the European country with the highest production rate was chosen. For this country, the regional distribution of the certain industry was determined.

Objectives: (i) To ensure that knowledge developed during the project is properly captured and dissemination is effectively targeted and carried out systematically (ii) To promote a continuous knowledge exchange and transfer for project outcomes with interested stakeholders beyond the consortium (iii) To formulate fact based policy recommendations that stimulate the transition towards a circular economy (iv) To create public awareness concerning the need for a circular economy and the actions required to move towards its realisation

Die Ökobilanz nach ISO 14040 kann die globalen Umweltwirkungen von Kläranlagen umfassend bewerten. Dabei werden durch die Lebenszyklusperspektive alle relevanten direkten und indirekten Umweltwirkungen über ein Stoffstrommodell erfasst und mit verschiedenen Indikatoren nachvollziehbar bewertet. Der Beitrag beschreibt das schrittweise Vorgehen bei einer Ökobilanz und zeigt anhand von Beispielen mögliche Anwendungsfelder und Ergebnisse auf.

Zur Verminderung von Spurenstoffeinträgen in Oberflächengewässer wurden bereits einige Kläranlagen in Deutschland und der Schweiz um eine weitergehende Reinigungsstufe (Ozon oder Aktivkohle) erweitert. Zur Erzielung einer gleichbleibenden Spurenstoffelimination und einer gleichzeitigen Vermeidung von Fehldosierungen (Kosten, Rohstoffeinsatz) werden verlässliche Messverfahren und robuste MSR-Konzepte (Mess-, Regel- und Steuerung) benötigt. Im Rahmen des Projekts „MeReZon" (Schnelle und zuverlässige Messtechnik und Steuer-/Regelkonzepte für eine weitergehende Abwasserreinigung) wurde an einer Pilot-Ozonanlage zur Behandlung von gereinigtem Abwasser untersucht, unter welchen Randbedingungen eine verlässliche Onlinemessung möglich ist. Dabei wurde u.a. die Leistungsfähigkeit eines neu entwickelten Ultraschallreinigungsmoduls zur Vermeidung einer Messwertdrift durch Fouling untersucht und mit den Sonden bzw. Reinigungsmodulen anderer Hersteller in verschiedenen Konfigurationen verglichen. Dabei wurden deutliche Unterschiede festgestellt. Darauf aufbauend wurde das bestehende MSR-Konzept der Ozonanlage optimiert und ein alternierender Messbetrieb, d.h. abwechselnde Beschickung einer Messsonde mit Zu- bzw. Ablauf der Ozonung, implementiert. Die Ergebnisse zeigen, dass mit dem optimierten MSR-Konzept eine stabile Abnahme des SAK254 (<U+0394>SAK254) erzielt werden kann, welche mit der Spurenstoffelimination korreliert. Die erfolgreiche Umsetzung des alternierenden Messbetriebs ermöglicht die Ermittlung der SAK254 Abnahme mit nur einer Messsonde, was prinzipiell Vorteile bei einer Regelung der Ozondosis auf ein stabiles <U+0394>SAK254 mit sich bringt. Zudem konnte gezeigt werden, dass die Onlinemessung der Fluoreszenz eine praktikable Alternative zum <U+0394>SAK254 darstellt, da diese ebenfalls eine Änderung des Ozonbedarfs integral erfassen kann und mit der Spurenstoffelimination korreliert. Die gewonnenen Ergebnisse bieten Messgeräteherstellern wertvolle Anhaltspunkte wie sie ihre Onlinesonden und Reinigungsmodule weiter optimieren können. Das entwickelte MSR-Konzept bzw. der alternierende Messbetrieb kann von Betreibern von Ozonanlagen auf kommunalen Kläranlagen zur Optimierung bestehender oder zukünftiger Anlagen genutzt werden.

During the last decades, it has become evident that some active pharmaceutical ingredients (API) have harmful environmental impacts on aquatic ecosystems. Therefore, there is a need to decrease the amount of pharmaceutical residues that end up in the environment. Information gaps related to increased awareness of the environmental impacts of pharmaceuticals in the health care sector and the promotion of sustainable consumption of pharmaceuticals have been identified in the Status Report on Pharmaceuticals in the aquatic environment of the Baltic Sea Region (BSR) published by UNESCO and HELCOM in 2017. The aim of the current report is to fill in some of the identified knowledge gaps identified in the HELCOM report, specifically increasing awareness about the environmental impacts of pharmaceuticals. In Sweden, there are good practices for healthcare professionals about how to consider the environmental impacts of medications already at the prescription phase, as well as guidelines for how to make the environmental information available and accessible to healthcare professionals and the public. The Swedish practices are described and evaluated, and the measures that can be implemented in the other BSR countries are formulated as recommendations. Eight recommendations were formulated through dialogues with stakeholders in Sweden. The recommendations are divided into four main areas i.e. education, databases and guidelines, dissemination of information to public, and collaboration among stakeholders. Some recommendations might be implemented without any large challenges or financial costs while other recommendations require large changes such as economic investments and changes in legislation. This report also contains information about existing practices in other countries in the Baltic Sea region (BSR), provided by the project partners in the CWPharma project. The countries in the BSR are currently at different levels when it comes to management of pharmaceuticals and their residues in the environment. Public awareness of the environmental impacts of pharmaceuticals differs, as do the systems for returning leftover medications. Basic education for health care personnel regarding the environmental consequences of different medications and pharmaceutical compounds exists in most of the BSR countries but the scope and content differs. One recommendation in the report is that environmental impacts of APIs should be compiled in a national, or ideally an EU level, database. As a first step, the Baltic Sea countries could investigate the possibility to establish national interfaces to the Swedish databases “Pharmaceutical and environment” (Janusinfo) or FASS. Although the data in “Pharmaceutical and environment” and FASS are not complete, they are existing platforms which provide valuable information and gather criteria important for classification. In Sweden, there are several channels for the dissemination of information about the environmental consequences of pharmaceuticals with the aim to raise public awareness regarding this subject. Examples of actions to be considered by other countries are information campaigns driven by pharmacies for returning unused and left over medications (Germany and Finland have similar campaigns), and distribution of leaflets with information about the environmental impacts of pharmaceuticals, which have proven to be efficient in raising awareness among pharmacists, doctors and the public. The collaboration of different stakeholders is one of the foremost reasons for the progress that has been made regarding pharmaceuticals in the environment in Sweden. The Swedish Medical Production Agency has set up a Knowledge Centre for Pharmaceuticals in the Environment, providing a platform for different actors to discuss environmental issues connected to pharmaceuticals. Among these actors there is a sense of a shared environmental vision with common goals. Hence, one recommendation for the BSR countries is to investigate the possibilities of establishing similar national knowledge centers within medicine agencies, or to use existing networks as a starting point to also involve other environmental issues related to pharmaceuticals and to find new collaboration possibilities. Finally, collaboration between the EU countries is crucial to successfully implement environmental aspects in the lifecycle of the pharmaceuticals.