Carbon redirection in chemically enhanced primary treatment of domestic wastewater: A meta-analysis of laboratory to full-scale trials.

Increasing energy demands combined with local scarcities and rising prices make the valorisation of energy from domestic wastewater seen as a valuable resource. Chemically enhanced primary treatment (CEPT) enables an increased redirection of organic compounds into sludge in the primary stage of a wastewater treatment for a transformation into biogas (carbon capture). Traditionally used coagulants consist of metallic salts, but in the last two decades, the development of polymers, based on petroleum or synthesized from renewable sources such as plants, has been intensified.

Performance monitoring of constructed floating wetlands: Treating stormwater runoff during the construction phase of an urban residential development.

In the context of climate change and global trend towards greenfield urbanisation, stormwater and transported pollutants are expected to increase, impairing receiving environments. Constructed floating wetlands (CFWs) can improve stormwater retention pond performance. However, performance data are currently largely restricted to mesocosm experiments, limiting design enhancement fit for field implementation.

Structure and impact of root-associated fungi in treatment wetland mesocosms.

Root fungal endophytes have been shown to play a positive role in soil phytoremediation by immobilizing or degrading contaminants. In comparison, little is known about their ecological functions and possible role in improving plant performance in treatment wetlands. In a greenhouse study, we compared the structure of fungal communities associated with Phragmites australis roots in treatment wetland mesocosms fed with pre-treated wastewater to mesocosms fed with drinking water.

A-Stage process - Challenges and drawbacks from lab to full scale studies: A review.

In response to the growing global resource scarcity, wastewater is increasingly seen as a valuable resource to recover and valorise for the benefit of the society rather than another waste that needs treatment before disposal. Conventional wastewater treatment plants (WWTPs) oxidise most of the organic matter present in wastewater, instead of recovering it as a feedstock for biomaterials or to produce energy in the form of biogas. In contrast, an A-Stage is capable of producing a concentrated stream of organic matter ready for valorisation, ideally suited to retrofit existing large plants.

Optimizing floating treatment wetland and retention pond design through random forest: A meta-analysis of influential variables.

Floating treatment wetlands (FTWs), artificial systems constructed from buoyant mats and planted with emergent macrophytes, represent a potential retrofit to enhance the dissolved nutrient removal performance of existing retention ponds. Treatment occurs as water flows through the dense network of roots suspended in the water column, providing opportunities for pollutants to be removed via filtration, sedimentation, plant uptake, and adsorption to biofilms in the root zone. Despite several recent review articles summarizing the growing body of research on FTWs, FTW design guidance and strategies to optimize their contributions to pollutant removal from stormwater are lacking, due in part to a lack of statistical analysis on FTW performance at the field scale.