A fire is a large fire that spreads causing significant damage. It is considered one of the disasters that affects public infrastructure. In fact, the MLDK market in the municipality of Masina has experienced cases of fire of unidentified origin that have caused huge losses to small traders and even, caused huge expenses of rehabilitation work for the state and some pavilions have remained unrehabilitated to this day. The objective of this article is to set up a fire detection and extinguishing system equipped with networks, thermal sensors and sprinklers to prevent fires in order to protect people and their property. In addition to the literature review, which is upstream of all the methods used, this approach was based on direct observation and experimental methods supported by a field survey. The results obtained show the interest of this project on fire detection, especially in non-working hours. Automatic fire detection and extinguishing is a very complex and delicate process, which requires appropriate and efficient equipment.

Air pollution is a major public health issue worldwide, particularly in the provincial city of Kinshasa, and environmental protection has become a duty for all governments in recent years. Global warming and air pollution are the main reasons for this. Indeed, the study of air pollution aims to understand its particularities in order to limit its effects as much as possible. To achieve this goal, we will be setting up a measurement station equipped with MQ-135 sensor networks to collect useful data and send it to a remote server. In addition to the literature review that preceded all the methods used, this approach was based on the direct observation method supported by a field survey. On the one hand, the results of this study showed that the city of Kinshasa is much more affected by the nitrogen oxide pollution emitted by industry. On the other hand, since the mission of any State is to guarantee the safety of people and their property, to help the relevant State services to have adequate technical resources for permanent monitoring of the said environments, in order to combat any possible spillover of harm. We would also like to support these services in the organization of cells to combat any nuisance, and to include a heading reserved for this purpose in state taxes. These costs continue to elude the public coffers of the city of Kinshasa, representing an enormous loss of revenue for the State.

Advances in communication and data transmission are significantly improving the use of online applications and communication with wireless devices, achieving real-time interaction with remote devices, in this environment, 5G technology allows a very great technological advance in communication means; the study aimed to find out the level of knowledge that local Internet service providers and mobile operators have of this technology, as well as the degree of its implementation and use. 5G technology represents a set of improvements over current 3G and 4G communication technologies, such as greater bandwidth, low latency, short delays, low energy consumption, enabling the implementation of smart cities, home automation and business automation, significantly improving mobile and fixed communication, all of which, combined with the use of optical fiber, will completely change the way we use the internet as a means of communication.

This article encompasses a technical and mathematical description of the six-pulse drives used in industry and the verification of the percentage of current harmonics produced by each of them. An analysis of the total harmonic content produced by the six-pulse drives commonly used at Bralima RD Congo will be carried out, for this purpose the harmonic spectra given by the drive manufacturer are simulated in ETAP software to subsequently run a harmonics stream and assess compliance with technical service quality indices. In the event of non-compliance, the harmonic mitigation techniques will be plated and verified. The result includes analyzes and simulations based on real Bralima data and a technical guide for mitigating the harmonic currents produced by six-pulse drives is presented.

Today the power quality of industrial systems is a growing concern for electrical and electronics engineers. The main reason for deteriorating power quality is the high level of harmonics. Harmonics in industry are produced from many sources, primarily variable speed drives and rectified loads. The injection by non-linear loads of harmonic currents contributes significantly to the degradation of the power factor resulting in an increase in reactive power and apparent power. In this study, the analysis of harmonics will be presented in the brewing industry case of Bralima DR Congo using a PEL 103 meter. The measured THD values for voltage and current will be used to analyze their impact on the power factor. Some solutions are proposed for the reduction of harmonics and the correction of the power factor (PFC) at the same time in order to reduce the reactive and apparent powers and also to reduce the energy consumption impacting on the expenses due to the billing of electrical energy.