Manual cleaning protocols were developed for a gravity-driven membrane (GDM) module. Such a module is a promising solution for household water treatment in low- and middle-income countries. A filtration system equipped with the GDM module was tested in a batchwise manner using three different feed water solutions. Two types of manual cleaning protocols were performed to delay the permeability decrease, namely cleaning between batches and long-term cleaning (every 15 batches). The optimized protocol for cleaning between batches consisted of 3 twisting and 10 vertical shaking movements; the optimized long-term cleaning protocol consisted of 70 vertical shaking movements for both the middle region of the module and the module header. These cleaning protocols allowed the filtration system to produce sufficient water to meet the minimum requirements for a five person family using all three kinds of feed water solutions. The module produced water without Escherichia coli, even for the wastewater influent.
Bibliographical noteFunding Information:
This work was financially supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP), the Ministry of Trade, Industry, & Energy (MOTIE) of the Republic of Korea (No. 20184030202240), and also by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1C1B1009544).
© 2019 CIWEM
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Water Science and Technology
- Management, Monitoring, Policy and Law