کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1062750 948175 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of local and national effects of recovering phosphorus at wastewater treatment plants: Lessons learned from the UK
ترجمه فارسی عنوان
ارزیابی اثرات محلی و ملی بازیابی فسفر در گیاهان تصفیه فاضلاب: درس های آموخته شده از انگلستان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


• 9% total P and 21% PO4-P is recovered from WWTP influent into struvite product.
• Struvite recovery reduced centrate recycle stream by 57% total P and 45% PO4-P.
• Reducing chemical dosing equates to 58% of total savings achieved by P recovery.
• Recovering P from WWTP influent and ISSA reduces UK fertiliser imports by 36%.
• P recovery from WWTP influent and ISSA reduces P contained in water bodies by 22%.

P recovery from wastewater treatment plants (WWTPs) as struvite fertiliser is a recognised method of improving P use efficiency and reducing P losses into the environment. The main driver for P recovery from the water industry viewpoint is the reduction in the nuisance of struvite clogging inside pumps and pipes. Struvite recovery leads to an average P recovery rate of 72 ± 7% from centrifuge centrate, with 8.8 ± 0.7% total P and 20.5 ± 3.2% PO4-P removed from the WWTP influent as struvite. This reduces the potential for struvite precipitation, moderates P loads on biological nutrient removal processes and lowers P concentration in the final effluent. Totalling revenue from sale of struvite and operational site savings, P recovery becomes an attractive option for water companies. The implementation of P recovery technologies to produce struvite fertiliser in all UK WWTPs could produce a national P fertiliser source of 7.05 ± 2.01 kt P/year. In addition, sludge produced at WWTPs could be diverted to advanced energy recovery (AER) processes and P recovered from AER residues; up to 21.71 ± 0.95 kt P/year could be recovered in this way in the UK. Combining the two methods of P recovery, UK imports of P fertiliser could be reduced by 36.2 ± 1.1%. P recovery on a large scale has the further benefit of protecting against eutrophication by reducing P emissions to water bodies by 21.7 ± 1.9%. The protection of the environment and reduction in reliance on imported P are major national motivations to legislate P recovery from waste.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Resources, Conservation and Recycling - Volume 105, Part B, December 2015, Pages 347–359
نویسندگان
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