Statistical Analysis of Field-Based Stormwater Filtration Performance for the Ecosol Litter Basket

Increasing specificity in water quality regulations for the discharge of stormwater to the environment has increased the requirement to more accurately characterize the performance of filtration interventions. This work presents a statistical performance analysis for the Ecosol Litter Basket, an at source filtration device, based on an extensive field study. The field evaluation of the Ecosol Litter Basket, a primary stormwater filtration device, was performed over a three-year period in an urban catchment in Queensland, Australia. A total of 29 rainfall events were recorded, of which between 13 to 16 events were evaluated as qualifying for the purposes of characterizing the removal efficiency. A variety of pollutant removal evaluation metrics, including concentration-based and total load-based metrics, were utilized in this study to characterize the efficacy of the device for removing a range of pollutants. Two approaches are proposed to facilitate the analysis: a nonlinear regression approach to more effectively deal with nonlinear patterns in the influent and effluent data; and the regression of concentrations (ROC), which is an additional concentration-based metric. A statistical analysis of the results demonstrated that the differences between influent and effluent streams for TSS are significantly different in their mean and median, and the removal efficiency of the Ecosol Litter Basket was evaluated to be 57–65% for TSS with the influent event mean concentration (EMC) up to 142 mg/L.

SOSIALISASI MANFAAT KARBON AKTIF SEBAGAI MEDIA FILTRASI AIR GUNA MENINGKATKAN KESADARAN AKAN PENTINGNYA AIR BERSIH DI SMK PGRI CIKAMPEK

ABSTRAKKetersediaan air bersih menjadi sangat penting terutama di masa pandemi seperti saat ini. Indikator air bersih tidak hanya dilihat dari warna, tetapi juga dari aroma dan rasa. Untuk memperoleh air bersih salah satunya dapat menggunakan alat filtrasi air dengan karbon aktif sebagai salah satu media filtrasinya. Karbon aktif dapat menyerap zat-zat atau mineral yang mencemari air. Adapun manfaat karbon aktif dalam proses filtrasi air sebagai penyerap bau, warna, klorin atau mineral lain dan membuat rasa segar pada air. Selain menggunakan karbon aktif sebagai media filtrasinya, pada alat filtrasi air juga menggunakan media yang lain untuk membantu menghilangkan kontaminan pada air yang tercemar seperti menggunakan kerikil, ijuk dan pasir. Selain itu juga alat filtrasi dapat didesain dengan sangat baik sehingga aliran air tetap mengalir dengan cepat serta dilengkapi dengan adanya sinar UV untuk membunuh kuman atau bakteri pada air sehingga menjadi lebih steril. Adapun tujuan dari pengabdian ini adalah memberikan edukasi terhadap siswa/i SMK PGRI Cikampek dalam memanfaatkan karbon aktif sebagai salah satu media filtrasi air dalam multi-media water filter. Selain memberikan pelatihan pembuatan dan penggunaan alat filtrasi air, juga disampaikan cara pembersihan dan perawatan alat tersebut serta mengedukasi pentingnya air bersih dalam kehidupan terutama di masa pandemi covid-19 seperti saat ini. Kata kunci: covid-19; karbon aktif; multi-media water filter. ABSTRACTThe availability of clean water is very important, especially during a pandemic like today. The indicator of clean water is not only seen from color, but also by smell and taste. To obtain clean water, one of them can use a water filtration device with activated carbon as one of the filtration media. Activated carbon can absorb substances or minerals that pollute water. As for the benefits of activated carbon in the water filtration process as an absorber of odors, color, chlorine or other minerals and makes the water taste fresh. Apart from using activated carbon as the filtration media, the water filtration device also uses other media to help remove contaminants in polluted water such as using gravel, palm fiber and sand. In addition, the filtration device can be designed very well so that the water flow continues to flow quickly and is equipped with UV rays to kill germs or bacteria in the water so that it becomes more sterile. The purpose of this programme is to provide education to students of SMK PGRI Cikampek in utilizing activated carbon as one of the water filtration media in a multi-media water filter. In addition to providing training on the manufacture and use of water filtration devices, it was also conveyed how to clean and maintain these devices and educate the importance of clean water in life, especially during the Covid-19 pandemic like today. Keywords: covid-19; activated carbon; multi-media water filters.

A centrifugal microfluidic cross-flow filtration platform to separate serum from whole blood for the detection of amphiphilic biomarkers

The separation of biomarkers from blood is straightforward in most molecular biology laboratories. However, separation in resource-limited settings, allowing for the successful removal of biomarkers for diagnostic applications, is not always possible. The situation is further complicated by the need to separate hydrophobic signatures such as lipids from blood. Herein, we present a microfluidic device capable of centrifugal separation of serum from blood at the point of need with a system that is compatible with biomarkers that are both hydrophilic and hydrophobic. The cross-flow filtration device separates serum from blood as efficiently as traditional methods and retains amphiphilic biomarkers in serum for detection.

Comparative evaluation of the results of surgical treatment of open-angle glaucoma using an Ex-Press® P-200 filtration device and drainage device “anti-glaucoma implant A3”

Purpose. The article presents the results of a comparative analysis of the effectiveness of surgical treatment of open-angle glaucoma using the Ex-Press P-200 filtering device and the Anti-glaucoma A3 implant. Materials and methods. Using simple sequential sampling, 52 patients (59 eyes) were divided into 2 groups. The first group was implanted with Ex-Press P-200, the second with Anti-glaucoma implant A3. The follow-up period for patients ranged from 6 months to three years. At each visit, a standard ophthalmic examination was performed. For tonometry, the ICare TA01i portable non-contact tonometer was used. To assess the stabilization of the glaucoma process, we performed static (threshold) automatic perimetry using the Pericom perimeter and optical coherence tomography (OCT) of the optic nerve heads using a Spectralis HRA-OCT tomograph (Heidelberg Engineering). Conclusions. The implantation of devices of both types led to a persistent decrease in intraocular pressure, maintenance of visual functions, and stabilization of the glaucoma process. Intra- and postoperative complications corresponded to the nature of filtering procedures and did not have significant differences in the groups. However, cases of shunt erosion were noted only in the group with implanted Ex-Press devices.

Portable and sustainable activated carbon-based device for electro-assisted water purification

Schematic representation of a carbon-based portable electrochemical filtration device designed to remove toxic amounts of lead and arsenic found in drinking water.