System and eco-material design based on slow-release ferrate(vi) combined with ultrasound for ballast water treatment

Abstract

Background The problem of ballast water is caused by microorganisms. The solution to solve this problem is ballast water disinfection. Until the recent day, there have not been many practical solutions. Usually, ozone, chlorine, and UV treatments were used for disinfection. However, these methods still have many weaknesses in treating ballast water. Methods The ferrate(vi) system proposed in this paper is liquid ferrate(vi) produced on-site using a slow-released system and combined with ultrasound. This paper investigated the optimum time to produce liquid ferrate(vi), pH, and temperature. Results The optimum synthesis time has been observed to be 10 min with the produced ferrate(vi) of 42,000 ppm. The optimal pH and temperature to make ballast water harmless have been observed to be the neutral pH condition at 25°C, respectively. The design of ballast water treatment using ferrate(vi) combined with ultrasound has also been proposed in this paper. Conclusions Ferrate(vi), as the primary material in ballast water treatment, has been successfully synthesized. The process of ballast water treatment using ferrate(vi) combined with ultrasound can be performed automatically using a time sensor and a mass sensor. With the proposed design, it can be a promising solution to solve the problems related to ballast water.

Potensi salvinia molesta dan pistia stratiotes dalam penurunan kadar fosfat, BOD, dan COD pada limbah cair laundry

“…Beberapa metode telah dikembangkan dalam mengatasi limbah [3]- [10]. Berdasarkan penelitian terdahulu oleh Istighfari, Dermawan, & Mayangsari (2017) melaporkan, didapatkan hasil kadar Biological Oxygen Demand (BOD) sebesar 103 mg/L, Chemical Oxygen Demand (COD) mencapai 239 mg/L dan fosfat mencapai 16 mg/L pada buangan limbah laundry di surabaya.…”