Design of experiment (DOE) based screening of factors affecting municipal solid waste (MSW) composting

Innovative Design and Realization of a Smart Rotary Composter with a Remote Management System

“…The discharge of the compost is continuous thanks to the conical shape on the right-hand side and the sheets welded on it.The introduction of homogeneous air into the drum is done by aeration which is carried out by means of a centrifugal fan (3) and perforated holes located on a round tube (5) figure 2(A). The evacuation of the odor to the outside is carried out by the centrifugal fan with gain (7) and a carbon filter installed in the chimney in order to absorb this odor (8).The drum is guided in rotation by four rollers (11) figure 2(A) which rotate at a speed of (4 rpm) thanks to a 220 V electric motor, a helical gear reducer (9) figure 2(A) and a belt pulley system (10) figure 2(A). The temperature, humidity and CH4 methane content are controlled by the use of sensors (6) figure 2(A) which are installed on the round tube (5).…”

“…Composting is a heterogeneous and biochemical process based on the mineralization of carbon dioxide materials, Ammonia, Water with incomplete hydration to produce a stable product with reduced pathogenic toxicity [4], [5],the achievement of this process depends on good management, which relies on monitoring, control to obtain real-time information [6]- [7]. Therefore, a successful composting operation requires good C/N (carbon/nitrogen content) mixing ratios, aeration rate [8], [9] to maintain the moisture content between 40% and 60% [10] and temperature control during the composting phases (mesophilic phase (20° to 45°) and thermophilic phase (45° to 65°)) [11]. There are several methods of composting such as small-scale composting, compost pile which consists of putting the organic waste in an open air space, pile in container compost is used to put the waste in a closed container, barrel compost is used to put the organic waste in a rotating cylinder, trench compost is used to dig a hole in the ground and put the organic waste, worm compost is a decomposition process using various species of worms, white worms and other earthworms.…”

Comparative Study of Fuzzy Inference System and Design of Experiment for Clean Room Equipment Factory

“…The random error terms are supposed to have a normal distribution, a constant variance, and are independent [9]. Many researchers applied DOE in choosing appropriate parameters in manufacturing industries [10]- [12].…”

Bioremediation Methods Assisted With Humic Acid for the Treatment of Oil-Contaminated Drill Cuttings

“…Temperature is used to monitor the process, because its evolution is related to many of the biological reactions that take place within the bioreactors (Kazemi et al, 2016). Temperature of the samples in the bioreactors fluctuated between 21 and 34 ºC during the experimental stage.…”