Assessment of the Physico-Chemical Quality and the Level of Metallic Contamination of the Dismissals of Sloppy Waters of Oran (Algerian West Coastline)

The coastal areas are the locus of activities requiring water of good physicochemical quality: recreational uses, aquaculture and fishing. Thesis areas are under the direct influences of wadis and wastewaters, which pass by the contributions of watersheds, urban and industrial discharge. Thesis discharges result, when the renewal of water masses is small compared to release, significant deterioration of water quality and marinades ecosystem. This study focuses one year assessment of water quality urban sewages from coastal urban centers western (Oran), with the aim of assessing the state of contamination by draws metals (Cd, Pb Zn and), have well ace the assessment of the physico-chemical quality of marinades waters to determines the potential impact of metal pollution one the west coast Algeria of. Lead has average concentrations high enough at the three studied sewages: 0.23 mg.l-1 at the urban sewage Oran of (standard deviation: 0.22 mg.l-1).Yew heavy metal concentrations vary greatly from one sample to another; have reflected in the standard deviations, no lasting changes obvious is. Only average levels of cadmium exceeding the normative

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

The influence of surface functionalization of activated carbon on dyes and metal ion removal from aqueous media

International audienc

Effects of co-digestion of camel dung and municipal solid wastes on quality of biogas, methane and biofertilizer production

Biogas and biofertilizer production from anaerobic digestion of local organic solid waste in Algeria is an attractive choice for greener and cleaner environment. In this paper, the study focused on the effect of co-digestion of municipal solid organic wastes (MSW) and camel dung (CD) for the quality production of biogas (methane) and bio fertilizer products. The concentration of methane production is the preeminent aim of this work. The experiment was set by feedstocks preparation where organic waste was mixed with tap water at 1:1 ratio and it allowed to digest at temperature of 40 °C. The operating hydraulic retention time (HRT) was set at 35 days. Physicochemical properties of feedstocks and constituent elements of the digestate were determined by American Public Health Association methods. The experimental study indicated that underdefined operational conditions such as constant organic loading rate (OLR) of 0.6 kg per day, hydraulic retention time (HRT) of 35 days and temperature of 40C from MSW and MSW and CD mixtures of ratio at one to one resulted in a higher methane production (57.3%) compared to monodigestion of camel dung that produced 45.6% of CH4) in a pH range between 7.0 to 8.1. The improvement has also found related to high biodegradability of the MSW, the slight ammonium concentration, the optimization of the carbon-to-nitrogen ratio (C/N 25.8:1) and to the well-balanced nutrients content of the feedstock. The digestate coming from anaerobic co-digestion has also used as bio-fertilizer and this by-product has a benefit to avoid the harmful effect in the digester system and in the surrounding environment. It is shown clearly that the MSW and CD are highly desirable substrates for anaerobic co-digestion with regards to their good biodegradability, high methane yield and good bio-fertilizer qualit

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