کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8493004 | 1552791 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen removal from water of recirculating aquaculture system by a microbial fuel cell
ترجمه فارسی عنوان
حذف نیتروژن از آب مجدد سیستم آبزی پروری توسط یک سلول سوختی میکروبی
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کلمات کلیدی
سلول های سوختی میکروبی، حذف نیترات، حذف آمونیاک، سیستم آبزی پروری گردش خون، مصرف انرژی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
چکیده انگلیسی
Maintaining low concentrations of nitrogen compounds in aquaculture water is a key requirement for a recirculating aquaculture system (RAS), due to the potential detrimental effects of ammonia or nitrate on fish growth and metabolic activities. Herein, a microbial fuel cell (MFC) was investigated to accomplish the removal of either nitrate or ammonia from real RAS water (with simulated daily nitrate/ammonium accumulation) while generating electricity, via aerobic nitrification in the cathode, electricity/concentration driven transport across anion exchange membrane, and subsequent heterotrophic denitrification in the anode chamber. The experiment went through two stages, nitrate removal (Stage I) and ammonia removal (Stage II). In Stage I when daily nitrate addition was performed to mimic nitrate accumulation (0.050â¯kg NO3â-Nâ¯mâ3 NCC dâ1, NCC: net cathodic chamber volume) in the MFC cathode, a stable current density of 12.48 A mâ3 could be achieved with a 73.3% nitrate removal and 91.3% COD removal at the end of day 15. To better mimic ammonium accumulation in the RAS effluent without a biofilter, daily ammonium addition (0.050â¯kg NH4+-Nâ¯mâ3 NCC dâ1) was performed in the cathode in Stage II. The MFC system achieved a total inorganic nitrogen removal rate of 0.051â¯kgâ¯Nâ¯mâ3 NCC dâ1, and a COD removal efficiency of 91.8% with a current density of 74.00 A mâ3. A preliminary analysis of energy balance indicated that the proposed MFC could potentially achieve energy-positive RAS water treatment with a net energy production of 7.50â¯Ãâ¯10â3 kWh mâ3 treated RAS water or 0.145â¯Â±â¯0.031 kWh kgâ1 removed nitrogen. The results of this study indicate that MFCs have a potential to treat RAS water with simultaneous energy recovery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 497, 1 December 2018, Pages 74-81
Journal: Aquaculture - Volume 497, 1 December 2018, Pages 74-81
نویسندگان
Shiqiang Zou, Lu Guan, Daniel P. Taylor, David Kuhn, Zhen He,