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Updated: Jul 18, 2026
09:50
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
Ammonia removal from pretreated methane fermentation effluent through a soil trench system: a column experiment
Xiaohui Lei1, Haruyuki Fujimaki, Yifeng Lu
1Graduate School of Life and Environmental Science, University of Tsukuba, Ichinoya 31-207, Tennodai 2-1, Tsukuba City, Ibaraki 3050006, Japan. rain_fields@hotmail.com
Chemosphere
|November 18, 2006
Summary
This study optimized ammonia removal in soil trench systems for wastewater treatment. Aeration improved efficiency, while lower application rates significantly enhanced ammonia removal by promoting nitrification.
Area of Science:
- Environmental Engineering
- Wastewater Treatment
- Soil Science
Background:
- Methane fermentation effluent contains ammonia, requiring effective removal before discharge.
- Soil trench systems offer a potential biological treatment method for ammonia-laden wastewater.
- Understanding optimal conditions is crucial for efficient ammonia remediation in these systems.
Purpose of the Study:
- To determine optimal running conditions for ammonia removal in a soil trench system.
- To elucidate the mechanisms of ammonia removal, focusing on adsorption and nitrification.
- To evaluate the impact of temperature, aeration, and application rate on treatment efficiency.
Main Methods:
- A soil column mimicking a soil trench system was used for wastewater treatment.
- Wastewater was applied at controlled rates and temperatures (<30°C).
- Variations in temperature, aeration, and application rate were tested to assess ammonia removal.
Main Results:
- Initial ammonia removal occurred via soil adsorption, which eventually saturated.
- Nitrification commenced around day 12, leading to a sharp decrease in ammonia.
- At steady-state, 98% of influent ammonia was converted to nitrate.
- Aeration enhanced removal; low temperatures and higher application rates impeded it.
Conclusions:
- Soil trench systems can effectively remove ammonia through adsorption and nitrification.
- Optimizing running conditions, particularly a lower wastewater application rate, significantly boosts ammonia removal efficiency.
- Aeration is beneficial, while low temperatures are detrimental to the process.
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