Sand ripples present a difficult challenge to current mine hunting approaches. We propose a robust and adaptive method that suppresses sand ripples prior to the detection stage. The method exploits a fractal model of the seabed and the connection between: dual-tree wavelets and local, directional fractal dimension; interscale energy ratios, scale invariant frequency localised fractal dimension,...

In this research, the effect of friction between the liquid metal and the sand mould wall and the effect of passage of liquid through a vertical bend and through a ceramic filter on the fluid flow and the melt velocity has been studied by measuring the velocity of the melt and direct observation of the liquid flow through the different parts of a naturally-pressurized running system. The fricti...

The German Federal Environmental Agency (Umweltbundesamt – UBA) operates an experimental field on the southern outskirts of Berlin for the investigation of special aspects of environmental hygiene. One part of the field consists of a storage pond with subsequent bank filtration, artificial recharge and slow sand filtration where experiments on the behavior of hazardous substances during bank fi...

Keberadaan Bank Sampah Toli-Toli Mandiri (BSTM) telah menjadi fasilitas pengolahan sampah bagi masyarakat dan sekitarnya. Proses di tempat ini meliputi pengumpulan, pemilahan konversi sampah. Lokasi BSTM berdekatan dengan sungai Kalangkangan yang menerima luaran langsung berwujud limbah cair dari BSTM. Pengolahan berupa lindi potensial dilakukan menggunakan sistem filtrasi constructed wetland d...

In this study, the simulation results of four vertical flow wetland systems using the HYDRUS Wetland Module are presented. The four wetland systems comprise three single-stage pilot scale systems and one full-scale two-stage system. The main difference between these systems is the filter media used, referred to as fine media, i.e., sand with a grain size distribution 0.063–4 mm, or coarse media...

Microplastics (MP) can pose a serious threat to the environment and human health because of their tiny size ability spread easily in water. One alternative treatments remove MP from water is rapid sand filter (RSF). The objective this study was analyze effects media loading rate on RSF performance removing MP. applied silica with effective sizes (ES) 0.39 0.68 mm. rates filtration were 4; 6; 8 ...