National Advanced School of Public Works

Purification performance of coconut fibers, palm kernel fibers, and shredded plastic bottles in biofilter septic tanks: efficiency and limitations

ABSTRACT This biofiltration system tests three substrates: plastic fragments (COD: -55%, turbidity: -95%, nitrates: -60%), palm kernel fibers (COD: -69%, turbidity: -95%, nitrates: -70%), and coconut fibers. The latter show optimal performances with a maximum reduction in COD (-7...

Characterization and modeling of the effects of extraction parameters for tannin from the bark of the tropical wood Detarium microcarpum, utilizing the design of experiments method, aimed at exploring its potential application in formulating eco-friendly industrial resins

This work aims to optimize the conditions for extracting tannin from Detarium microcarpum (DM) using a rigorous, well-known methodological approach based on the Design of Experiments (DoE) method in order to maximize the yield and quality of the extracts. This study is the first...

Leveraging skybridge in coupled cylindrical storage tanks to mitigate seismic vibration

This study investigates the mitigation of excessive vibrations in two adjacent elevated storage tanks exposed to sequential nonstationary seismic excitations with time-varying frequency content. The coupling between the adjacent tanks is achieved through a sky-bridge structure th...