The promotion of agroecological approaches to fertilization include the use of liquid biofertilizers, which contribute to improving the income of producers but also to sustainably preserving the soil. It is with this in mind that this study specifically aimed to compare the effects of liquid biofertilization and chemical fertilization on vegetative growth and pepper production, with a view to establishing practical guidelines for market gardeners in Kinshasa/Mont-Amba. To achieve these objectives, a Randomized Complete Block device was installed with three treatments, namely the liquid biofertilizer Rapid Gro, the chemical fertilizer NPK 12-24-12 and the control without fertilizer in order to collect the data to be used for statistical analyzes to infer the necessary trends. At the end of the data analyses, the results showed that from the point of vegetative growth, the fertilizers used induced significant effects on shoot growth. The height obtained with the treated plants was greatly significant compared to that obtained with the untreated plants (except Rapid Gro). No statistical difference was obtained from the point of view of plant vigor. From a production point of view, the fertilizers used had significant effects on the yield components. Plots treated with Rapid Gro liquid biofertilizer showed significantly high production compared to plots treated with NPK 12-24-12 chemical fertilizers and those not treated in terms of average number of fruits per plot and average weight of fruits per plot.

The choice made on this subject is explained by the mismanagement of solid waste in the city of Kinshasa which constitutes a major problem for the latter. This is how we assessed the knowledge of the population of the Mbuku district in the Municipality of Kisenso on the management of solid household waste, with a view to trying to set up an integrated management system for this waste through the recovery or recycling. This led us to organize a separate collection of solid waste in 21 households in this neighborhood. The solid waste thus collected was categorized into organic and non-organic waste, then weighed separately according to the fractions. The organic waste was recycled into compost and the non-organic waste sent to the various respective recovery sectors. In this district, as the average household size is 17 people, waste production is estimated at 0.3 kg/person per day. The results of the physicochemical analyzes of the compost produced comply with standards and literature for mature, good quality compost. The compost produced played a big role in the fertility of the soil for growing amaranths which we used as a test. To remedy this situation, a diagram summarizing the systems to be implemented for integrated and sustainable management of solid household waste in the district was proposed as a project.