Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Design and Construction of a Soil Organic Filter to Reduce Odorous Gases for Waste Water Treatment Plants in Sudan

Auteur : Khalid Babiker Abd Alrehman, Babiker

Université de soutenance : University of Gezira

Grade : Master of Science (MS) in Chemical Engineering 2022

Résumé
In Khartoum State Sanitary corporation KSSC an open treatment plants and pump stations system is allowing large quantities of emitted gases or bad odor to escape to the ambient environment, an activated carbon filter odor removal plant is used, but the operation cost is high and facing many problems. The objective of this study is to design, construct and operate a soil organic filter for odor removal from local environment materials to work effectively, safely and economically according to the environmental regulations and requirements of the (SSMO) and WHO. A soil organic filter was constructed to eliminate or remove odor from waste water treatment plants and other facilities, it was constructed as laboratory scale size with a soil organic media consisting of wood chips, sludge and clay, and a second media used for comparison was Sand mixed with sludge, the selected emitted gases were hydrogen sulphide (H2S), ammonia gas (NH3) and nitrogen oxide (NO), they were tested before and after treatment. The constructed soil organic filter was designed as a closed bed filter, the body of the filter tank was from rigid plastic with the dimensions of (Length 40 cm, Width 40 cm and Height of 90 cm), gases entered at the bottom of the filter where a control valve was controlling the flow of the entering gases, air diffusers inside the filter were bubbling the gases at the bottom of the filter upward to the four layers of the filter, (coarse gravel, fine gravel, wood chips "nishara" and clay mixed with sludge) The designed soil organic filter treated and decreased the emitted gas of H2S from (6.8 ppm to 3 ppm), NO gas from (0.4 ppm to zero ppm) and NH3 gas from (0.11 ppm to 0.08 ppm) these results showed clearly the proper treatments of the soil organic filter, the other filter with Sand media was constructed for comparison The sand filter treated and decreased the emission of H2S gas from (6.8 ppm to 2.4 ppm), NO gas from (0.4 ppm to zero ppm) and the sand filter could not treat the emission of ammonia gas NH3. Further studies and moderations are recommended in the future to raise the efficiency of the designed Soil Organic Filter and encourage the use of it so as to reduce the cost of Odor removal in all Waste, Water treatment facilities.

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