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:: دوره 3، شماره 1 - ( 12-1394 ) ::
جلد 3 شماره 1 صفحات 35-40 برگشت به فهرست نسخه ها
Treatment of mature landfill leachate by chemical precipitation and Fenton advanced oxidation process
چکیده:   (3249 مشاهده)

Background: Mature landfill leachate is a complicated mixture which is resistant to biological treatment processes. The treatment of mature landfill leachate by struvite precipitation and Fenton oxidation was the main objective of the current research.
Methods: Struvite with the phosphate/ammonia/magnesium molar ratio of 1/1/1.05 was considered during all experiments. Five initial pHs of 3, 4, 5, 6, and 7, four different H2O2/Fe mass ratios of 50, 100, 200, and 400, and reaction times of 20, 40, 80, 120, and 160 minutes were examined for the Fenton oxidation process.
Results: A leachate sample with average chemical oxygen demand (COD), BOD5, and NH4 concentrations of 7350, 2220, and 2280 mg L-1, respectively, and a BOD5/COD ratio of 0.3 was introduced to the chemical precipitation unit. An NH4 removal efficiency of 87% was obtained at pH 8.5 for struvite precipitation. Under optimum conditions of Fenton oxidation, including pH 3, an H2O2/Fe2+ mass ratio of 200, and a reaction time of 160 min, more than 95% COD and BOD5 removal was observed.
Conclusion: Struvite precipitation and Fenton oxidation are reliable and efficient alternatives for mature landfill treatment.

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نوع مطالعه: پژوهشي | موضوع مقاله: عمومى
دریافت: ۱۳۹۵/۱/۲۲ | پذیرش: ۱۳۹۵/۱/۲۲ | انتشار: ۱۳۹۵/۱/۲۲
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Jaafarzadeh Haghighi Fard N A, Jorfi S, Ahmadi M, Mirali S, Kujlu R. Treatment of mature landfill leachate by chemical precipitation and Fenton advanced oxidation process. Environ. health eng. manag.. 2016; 3 (1) :35-40
URL: http://ehemj.com/article-1-141-fa.html

Treatment of mature landfill leachate by chemical precipitation and Fenton advanced oxidation process. مجله مدیریت و مهندسی بهداشت محیط. 1394; 3 (1) :35-40

URL: http://ehemj.com/article-1-141-fa.html



دوره 3، شماره 1 - ( 12-1394 ) برگشت به فهرست نسخه ها
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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