Application of multi-criteria analysis for selection of technology for small wasterwater treatment plants

The paper presents application of multicriteria analysis for selection of the best technology of a small wastewater treatment plant. The calculations performed for two plant capacities and various effluent standards are based on compromise programming method. For each plant’s capacity the three different treatment technologies are considered. The selection of the best technology is done with a define set of sustainability criteria. The proposed method can be used for selection of the best treatment technology and the technical solution at the stage of wastewater system planning and designing as well as for evaluation of already operated plants from sustainability standpoint

A review of methods for the isolation of microplastics in municipal wastewater treatment

Wastewater treatment plants are considered to be one of the largest sources of microplastics in the natural environment. The problem of microplastics has been widely studied in many environments. It remains a subject of the growing interest for researchers. By definition, microplastic is plastic that does not exceed 5 mm in size. There are three stages in the study of microplastics in wastewater: sampling, treatment, and the identification of microplastics. This paper aims to review the strategies for sampling microplastics in wastewater treatment plants and their laboratory treatment to isolate microplastics. The collection of samples from the wastewater treatment plant is based on two mechanisms, namely a continuous filtering and pumping system and instantaneous sampling (steel bucket, glass jar, telescopic sampling). The removal of organic and inorganic matter is carried out with the use of physical and chemical analyses. The subject of this article is the compilation of the generally available research methods on microplastics. Based on the literature analysis, conclusions were drawn regarding the recommended methods of microplastic detection