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  • 1
    Electronic Resource
    Electronic Resource
    AMMONIA STRIPPING AS A PRETREATMENT FOR LANDFILL LEACHATE (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 209-220 
    Details
    ISSN: 1573-2932
    Keywords: landfill leachate ; pretreatment ; ammonia stripping ; lime
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effectiveness of ammonia stripping at different air flow rates (0, 1 and 5 L min−1) and lime dosages (0 and 10 000 mg L−1 calcium hydroxide) was investigated in aeration tanks in a laboratory as a pretreatment to remove ammoniacal-nitrogen and organic load (COD) in landfill leachate. Ammoniacal-nitrogen removal at 20 °C after one day was 70% for 0 L min−1, 81% for 1 L min−1 and 90% for 5 L min−1 regardless of the origin of leachate. Ammonia loss was mainly due to desorption through water surface. The levels of phosphorus and COD were only reduced by lime precipitation, with 85% and 93% phosphorus removal and 24% and 47% COD removed for leachate from the Junk Bay Landfill (JB) and Gin Drinkers' Bay Landfill (GDB) respectively. The highly significant difference (P〈0.05) of COD removal between JB and GDB might be due to the different age of the two landfills studied. Leachate quality and configuration of the treatment reactor were important factors affecting the efficiency of ammonia removal by stripping processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026413031434
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ammonia stripping as a pretreatment for landfill leachate (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 209-221 
    Details
    ISSN: 1573-2932
    Keywords: landfill leachate ; pretreatment ; ammonia stripping ; lime
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effectiveness of ammonia stripping at different air flow rates (0, 1 and 5 L min−1) and lime dosages (0 and 10 000 mg L−1 calcium hydroxide) was investigated in aeration tanks in a laboratory as a pretreatment to remove ammoniacal-nitrogen and organic load (COD) in landfill leachate. Ammoniacal-nitrogen removal at 20°C after one day was 70% for 0 L min−1, 81% for 1 L min−1 and 90% for 5 L min−1 regardless of the origin of leachate. Ammonia loss was mainly due to desorption through water surface. The levels of phosphorus and COD were only reduced by lime precipitation, with 85% and 93% phosphorus removal and 24% and 47% COD removed for leachate from the Junk Bay Landfill (JB) and Gin Drinkers' Bay Landfill (GDB) respectively. The highly significant difference (P〈0.05) of COD removal between JB and GDB might be due to the different age of the two landfills studied. Leachate quality and configuration of the treatment reactor were important factors affecting the efficiency of ammonia removal by stripping processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407103
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of Landfill Leachate on Growth and Nitrogen Fixation of two Leguminous Trees (Acacia Confusa, Leucaena Leucocephala (1999)
    Springer
    Water, air & soil pollution 111 (1999), S. 29-40 
    Details
    ISSN: 1573-2932
    Keywords: Acacia confusa ; landfill leachate ; legume ; Leucaena leucocephala ; nitrogen addition ; nitrogen fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The influence of landfill leachate on the rhizobia-legume systems of Acacia confusa and Leucaena leucocephala was assayed for five months with a serial dilution (73–0.58%) of leachate which had a high concentration of NH4-N and dissolved organics. Although the acetylene reduction activity (ARA) of the nodules was suppressed by the leachate, the harvestable biomass of inoculated seedlings was higher than rhizobia-free seedlings. The total N content in rhizobia-free seedlings was higher than that for inoculated seedlings, indicating that the legumes accumulated more N from leachate-irrigated soil when they were not inoculated. Their performance was compared with that of two non-legumes (Cinnamomum parthenoxylon, Tristania conferta). These two non-legumes tolerated the highest concentration of leachate for only one month and then started to wilt. The total N contents of their tissue were less than those of the two legumes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005088919668
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