Assessing the degree of pollution of the river Kintama by the use of benthic macroinvertebrates is the theme of this work. It was made from samples taken between July and August 2016 Idjwi island territory to characterize this said river from possible pollution. The levy was followed by sorting at the bank, identification and preservation of specimens to the laboratory for teaching and research unit in Hydrobiology applied PSI / Bukavu. Wildlife identified in this work consists of 1834 individuals corresponding to 16 families belonging to 3 main faunal groups (annelids, mollusks, arthropods). The number of benthic settlement showed that Trichoptera, Diptera, Oligochaeta, Odonata, the are dominant. Decapod crustaceans, beetles and molluscs constitute only a small fraction of the total fauna. Values of Standardized Global Biological Index ranked the water upstream and downstream of Kintama in the category of medium and bad ecological quality for those intermediate stations. On the whole, the waters of this river are medium ecological quality. Furthermore, analysis of stand structure through Shannon Weaver index and equitability showed that Kintama river is characterized by macrobenthic fauna less diverse and generally unbalanced. The index of Margalef proved that Kabati station (1,596) followed by the mouth of Lake Kivu (1,411) and Lugano (1,368 are richer compared to resorts Institute Ziwa Kivu (0.882) and Deck Kintama (0.752) poorest taxa. note that all these values were lower than 2 which means that taxonomic richness is low everywhere. the results obtained in this study, conducted in a river crossing a rural area, have seen a situation that tends to a calamity of the water quality of the Kintama and especially in its middle section. The results of this study can also be used to conserve biodiversity and restoring these ecosystems continually impacted.

The theme of this article is "Comparative Production of ethanol through fermentation of a few natural sources of sugar Province of South Kivu." The high price of ethanol to the market making it unreachable product to the people dictated the choice of this theme. This work covered a period from December 2015 to February 2016 in the province of South Kivu. This was done methodologically by fermentation of different sources of sugar including pineapple, sugar cane, sorghum and sweet potato leaves. Fermentation was followed by distillation to find concentrated alcohol. It was noted that in addition to ethanol, the pineapple juice was too overloaded with other products (10.1% distillate / distillate volume) while the sweet potato leaves turn out to be the most appropriate ( 5.5% of distillate / distillate volume). Moreover, the sugarcane produced a better yield in alcohol (47.1%) while the sweet potato leaves produced in low percentage (15.2%).