IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : A Field Experiment and Water Quality Modeling on Nitrification of Waste Landfill Leachate by Using M...
A Field Experiment and Water Quality Modeling on Nitrification of Waste Landfill Leachate by Using Micro-Bubble Aeration
Author : Kohsuke INOUE, Kenji TANAKA, Kohji MICHIOKU, Hiroya TANAKA, Masahiro YAGI and Tamihiro NAKAMICHI
Significant ammonia nitrogen is loaded from a municipal landfill leachate. Since the leachate is deoxidized through infiltration and travelling underground, the first step of water treatment is to oxidize or nitrify the leachate. Although various nitrification techniques have been developed so far, such concentrated treatment systems are feasible only in a case of young landfill with an extremely high level of ammonia load. The landfill in this study is, however, already older than forty years and ammonia-nitrogen load has decreased to a level around several ten mg per liter. In this case, a labor-saving and economic nitrification system is required for making a sustainable water quality management. In a leachate reservoir under investigation, a micro-bubble aeration system was equipped and its nitrification performance was examined by conducting an in-situ experiment in an enclosure. +-- Monitoring time-dependent behaviors of NH -N, NO -N, NO -N and DO, it was discussed how the 4 2 3 nitrification rate was influenced by relating limiting factors. It was also confirmed that denitrification took place in addition to nitrification in the experimental system. It is shown that the micro-bubble aeration is a promising technology as an alternative of the present water treatment system.
File Size : 1,827,375 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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