Valorization of Household Waste via Biogas Production in Algeria since 1938%253A Inventory and Perspectives

Energy is an important factor in Algerians economy, the recent Algerian%252339%253Bs economy crisis is due to the fall of the oil incomes of 70%25 in less than two years, which made the country lose half of its external receipts and causing an important deficit of its trade balance. The fossil fuel reserves will not last eternally (some 40 to 50 years) and the human activity causes a significant change of the climate, which has actually important repercussions. The need to find an alternative and renewable source of energy is becoming increasingly important for the sustainable development. However, Algeria is a country rich in solar and biomass layer%253B according to the National Waste Agency, more than 28,219 tones of municipal solid waste are generated per day. Energetic valorization of municipal solid waste (MSW) seems to be an alternative solution for sustainable development of Algeria, which the biogas constitutes a considerable source of renewable energy. This paper presents an overview for the status of this technology in Algeria including the increasing of the interest in methanization since 1938. Also in this study, is referred the first experience of Tamanrasset (southern of Algeria) in the field of biogas production

Synthese et reactivite de composes de coordination binucleaire du fer carbonyle a ligands trithiocarbonates cycliques et lineaires

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Valorization of household waste and camel dung via biogas production

In the present paper, we investigated about the potential of municipal solid waste (MSW) and camel dung (CD) as feedstock for biogas production. The media composition for biogas production is the main aim of this study. Batch mesophilic biochemical methane potential (BMP) tests were carried out and the methane potential as well as the biodegradability of all substrates was defined. Three reactors (digesters) with two (2) liters capacity were operated to investigate about the effect of co-digestion of MSW and CD manure on biogas product quality and efficiency. The result had shown that the MSW and CD contained well balanced nutrients for anaerobic microorganisms to biogas production. The experimental studies indicated that the biological biogas production of organic fraction of municipal solid waste and camel dung in mesophilic (T=40°C) temperature was ranging from 45% to 57%. This study has indicated that the MSW and CD are a highly desirable substrate for anaerobic digestion with regards to their high biodegradability and methane yield

Effet de la pollution atmosphérique par les hydrocarbures sur le lichen Xanthoria parietina (L.) Th (Teloschistaceae) dans la zone de Hassi Messaoud (Sahara septentrional algérien

International audienceThis work is focused on bio-detection air pollution by hydrocarbons in the area of Hassi Messaoud Ouargla region (Northern Sahara Algerian East). Lichens collected on their support in the northeast of Algeria (Annaba), are used as a biological model to assess the effects of this pollution transplantation for 75 days. The levels of soluble compounds in hexane (CSH) at the lichen transplants increase and then decrease during the exposure time. With respect to the chlorophyll content, it decreases as the sampling period. The changes observed over time could have originated two causes of air pollution on the one hand and dehydration thalli under the effect of the temperature of the other areas.Le présent travail porte sur la bio-détection de la pollution atmosphérique par les hydrocarbures dans la zone de Hassi Messaoud située dans la région de Ouargla (Sahara septentrional Est algérien). Les lichens prélevés sur leur support dans le nord-est de l’Algérie (Annaba), sont utilisés comme modèle biologique pour évaluer les effets de cette pollution par transplantation pendant 75 jours. Les teneurs en composés solubles dans l’hexane (CSH) au niveau des transplants lichéniques augmentent puis diminuent au cours du temps d’exposition. La teneur en chlorophylle diminue en fonction de la période d'échantillonnage. Les modifications observées au cours du temps pourraient avoir pour origine deux causes, la pollution atmosphérique d’une part et la déshydratation des thalles sous l’effet de la température du milieu d’autre part