-Miljöbalksprövning med fokus på mineralutvinning och utsläpp av näringsämnen-Tillsyn vattenlevande GMO-Tillsynsvägledning vattenbruk

På HaV har jag sedan 2016 främst arbetat med övergödningsfrågor inom både vatten- och havsförvaltningen. Som exempel kan nämnas:- Finansiering, planering och utvärdering av åtgärder mot övergödning- Miljöbalksprövningar, yttranden och vägledning- Regeringsuppdrag- Expert i utredning ”Stärkt lokalt åtgärdsarbete – att nå målet ingen övergödning” (SOU 2020:10)- Internbelastningsfrågor- Vattenbruk- Särskilda satsningar- Lokal samverkan (LEVA) - Nationell samverkan (universitet, myndigheter och intresseorganisationer)- Internationell samverkan (HELCOM samt EU:s Östersjöstrategi EUSBSR)- Samverkan och beslutsunderlag avseende SMHI:s arbete inom vattenförvaltningen - Samverkan och beslutsunderlag avseende Vatteninformationssystem Sverige (VISS) (Förvaltningsledare 2018)

Nitrogen removal in mining-impacted watersMining impacted waters (MIW), and more specifically acid mine drainage (AMD) and nitrogen (N) emissions, discharged as a function of current or legacy mining activities represents a significant threat to human health, the ecology of receiving waters, and economic prosperity. The low pH and high concentration of sulfate and metals released through AMD is one of the most important mining-related pollution problem in the world with a global treatment cost in the order of tens of billions of U.S. dollars. Thus, the impact of AMD-generation must be controlled and treatment options applied. Similarly, N-pollution from mining activities, such as leaching from undetonated ammonium nitrate fuel oil (ANFO) or degradation of cyanide used in gold extraction processes, may cause eutrophication of recipient waters, toxification of fish, and the release of N2O, which in addition to being a greenhouse gas is the most important ozone-depleting substances of our century. To address these issues, the specific objectives are:1. Revealing the geochemical zonation linked to spatial distribution of microorganisms affecting performance of sulfate reducing bioreactors (SRBRs) treating acid mine drainage. 2. Development of treatment strategies for biological sulfate reduction in SRBRs receiving AMD.3. Estimation of actual and potential greenhouse gas emissions (CH4 and N2O) from SRBRs and denitrifying barrier systems. 4. New methods for the analysis of distributional patterns of i) microbe-mineral interactions and ii) functional groups in denitrifying biofilms in N-removing barrier systems, coupled to process performance and N2O-emissions

Microbe-Mineral interactions, Mitigation of Mining Impacted Waters.Mining impacted waters (MIW), and more specifically acid mine drainage (AMD) and nitrogen (N) emissions, discharged as a function of current or legacy mining activities represents a significant threat to human health, the ecology of receiving waters, and economic prosperity. The low pH and high concentration of sulfate and metals released through AMD is one of the most important mining-related pollution problem in the world with a global treatment cost in the order of tens of billions of U.S. dollars. Thus, the impact of AMD-generation must be controlled and treatment options applied. Similarly, N-pollution from mining activities, such as leaching from undetonated ammonium nitrate fuel oil (ANFO) or degradation of cyanide used in gold extraction processes, may cause eutrophication of recipient waters, toxification of fish, and the release of N2O, which in addition to being a greenhouse gas is the most important ozone-depleting substances of our century. To address these issues, the specific objectives are:1. Revealing the geochemical zonation linked to spatial distribution of microorganisms affecting performance of sulfate reducing bioreactors (SRBRs) treating acid mine drainage. 2. Development of treatment strategies for biological sulfate reduction in SRBRs receiving AMD.3. Estimation of actual and potential greenhouse gas emissions (CH4 and N2O) from SRBRs and denitrifying barrier systems. 4. New methods for the analysis of distributional patterns of i) microbe-mineral interactions and ii) functional groups in denitrifying biofilms in N-removing barrier systems, coupled to process performance and N2O-emissions

Efficient nitrogen removal at wastewater treatment plants (WWTPs) is necessary to avoid eutrophication of recipient waters. The most commonly used approach consists of aerobic nitrification and subsequent anaerobic denitrification resulting in the release of dinitrogen gas into the atmosphere. Nitrification is a two-step process performed by ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) often grown in biofilms at WWTPs. An alternative approach is anaerobic ammonium oxidation (anammox) where anammox bacteria convert ammonium and nitrite directly into dinitrogen gas. These groups of bacteria grow very slowly and are sensitive to perturbations, which may result in decreased efficiency or even breakdown of the process. Therefore, the ecology and activity of these bacteria and the structure of the biofilms in which they grow require detailed investigation to improve the understanding of nitrification and to facilitate the design of efficient nitrogen-removal strategies.To facilitate such studies of relevance for wastewater treatment, a nitrifying pilot-plant was built where environmental conditions and especially ammonium concentrations could be controlled.In an experiment on model nitrifying trickling filters (NTFs), it was shown that biofilms subjected to intermittent feeding regimes of alternating high and low ammonium concentration in the water, could maintain a higher nitrification potential than biofilms constantly fed with low ammonium water. Such ammonium feed strategies can be used to optimize wastewater treatment performance.Different AOB populations within the N. oligotropha lineage were shown to respond differently to changes in environmental conditions, indicating microdiversity within this lineage which may be of importance for wastewater treatment. This diversity was further investigated through the development of new image analysis methods for analyzing bacterial spatial distribution in biofilms.