Energy is a key factor to socio-economic development. There is clear correlation between energyrnconsumption and the level of standard of living. On the other hand, human societies produce wastesrnthat can represent a useful raw material for the production of energy, and recovery of by-products andrncomponent water. In this paper, the potential of Moringa stenopetala seed cake powder which is a byproductrnof the hexane extract of the seed is evaluated for its contribution in biogas production andrnbrewery wastewater treatment through coagulation. Moringa stenopetala seed cake powder was usedrnas feedstock in nine serum bottles with a capacity of 2.5 L. The anaerobic digestion was conducted inrntriplicate with 10%, 15% and 20% of their working volume inoculated with actively digested biogasrnslurry. The experimental findings showed that the composition of methane in all of the digesters isrnwithin the range of 62-72%. The amount of biogas produced over a retention time of 68 days was alsornbetween 6.6 L to 7.7 L. The Physico-chemical characteristics of the seed cake powder revealed thernsuitability of the substrate for biogas production. No inhibitory factors were found within the seedrncake powder. However, the total solids percentage of the seed cake powder was about 93% which canrnbe considered as a drawback in areas which suffer from water drought for large scale application of thernsubstrate in biogas production. The other application of the seed cake powder studied in this work is tornevaluate its potential for brewery wastewater treatment. The brewing industry is one of the largestrnindustrial users of water. The wastewater is also characterized by different valuable nutrients.rnRecovery of these resources and treatment of the wastewater to reduce the impact on the receivingrnwater bodies is an important aspect of this research. Moringa stenopetala seed cake powder was foundrnto be an effective coagulant in reducing total phosphorus, turbidity and total suspended solids fromrnthe brewery effluent achieving an average removal efficiency of more than 90%. A relatively betterrnefficiency of more than 80% was achieved for COD and BOD. The removal efficiency for totalrnnitrogen was about 43%, a lower but important figure as coagulation is a physical process. However,rnconductivity, total dissolved solids and pH were not significantly affected through the coagulationrnprocess. Better removal efficiency was obtained at a coagulant concentration of 500mg/L. Therefore,rnMoringa stenopetala seed cake powder which is a by-product of the hexane extract of the seed can bernmanaged by using as substrate for biogas production and as coagulant for brewery wastewaterrntreatment.rnKey words: Moringa stenopetala seed cake powder, Biogas, coagulation, Brewery wastewater, averagernremoval efficiency