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ارتقای کارآمدی حذف بار آلی، فسفر و آمونیم در تصفیه فاضلاب به روش راکتور ناپیوسته متوالی(SBR) با استفاده از فناوری الکتروشیمی | ||
محیط شناسی | ||
دوره 51، شماره 1، خرداد 1404، صفحه 1-17 اصل مقاله (1.1 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jes.2025.371371.1008474 | ||
نویسندگان | ||
زهرا ابوالحسن زاده* ؛ گاگیک بدلیانس قلی کندی | ||
گروه آب و فاضلاب، دانشکده عمران ، آب و محیط زیست ،دانشگاه شهید بهشتی ،تهران،ایران | ||
چکیده | ||
هدف: تصفیه پیشرفته فاضلاب یکی از ضروریترین اقدامات برای کاهش آلودگیهای زیستمحیطی و حفظ منابع آبی در مواجهه با افزایش فعالیتهای صنعتی و شهری است. این فرآیند با حذف آلایندههای پیچیده و مقاوم، امکان بازگشت آب تصفیهشده به چرخه طبیعی یا استفاده مجدد را فراهم میکند و نقشی کلیدی در توسعه پایدار ایفا مینماید همچنین حذف مطمئن بیشینة بار آلی فاضلاب ورودی به تصفیهخانه و دستیابی مستمر به حدود مجاز غلظت مواد مغذی (فسفر و نیتروژن) در پساب خروجی از تصفیهخانه را میتوان از جمله مهمترین اهداف تصفیه فاضلاب به شمار آورد. روش پژوهش: در این تحقیق، امکانسنجی ارتقای عملکردی روش راکتور ناپیوسته متوالی (SBR) با استفاده از فناوری الکتروشیمیایی در مقیاس آزمایشگاهی انجام پذیرفت. با بهکارگیری فناوری الکتروشیمیایی در سامانة متعارف تصفیه فاضلاب در ولتاژهای مختلف (1 تا 15 ولت)، میزان حذف بار آلی، فسفر، نیتروژن آمونیاکی، اندیس حجمی لجن و انرژی مصرفی سامانه بر روی دو نمونه فاضلاب واقعی و سنتتیک مورد بررسی قرار گرفت. یافتهها: با اعمال ولتاژهای کمتر از 5 ولت میزان حذف بار آلی تا 5/1 برابر افزایش یافت و در حالت بهینه (ولتاژ 3) میزان حذف بار آلی در سامانه به 98 درصد رسید. همچنین کاهش 99 درصدی میزان فسفر موجود در نمونه فاضلاب و 69 درصدی نیتروژن آمونیاکی موجود با اعمال حداقل ولتاژهای 5 تا 1 ولت به سامانة متعارف SBR اندازهگیری شد. با اعمال فرایند الکتروشیمی، اندیس حجمی لجن (SVI) در مدت زمان کمتر و به میزان به مراتب بیشتر از سامانة متعارف SBR کاهش یافت که بیشترین مقدار کاهش در ولتاژ 15 ولت و تا سه برابر کمتر از مقدار اندیس حجمی لجن در مدت زمان یکسان در سامانة متعارف بوده است. همچنین حداکثر انرژی مصرفی سامانة الکتروشیمی تحت شرایط بهینه راهبری برابر 78/1 کیلووات ساعت به ازای هر مترمکعب فاضلاب تعیین گردید. نتیجهگیری: نتایج این بررسی نشان میدهد که ارتقای این سامانة متعارف تصفیة بیولوژیکی فاضلاب از طریق بهکارگیری هم زمان روش الکتروشیمیایی منجر به افزایش کارآمدی در حذف بار آلی، فسفر و آمونیوم به ویژه در ولتاژهای کمتر از 5 ولت میگردد. علاوه بر این، نتایج این تحقیق نشان میدهد که تحت شرایط بهینه راهبری، بهکارگیری روش الکتروشیمیایی منجر به کاهش مدت زمان ماند، بهبود قابل توجه مقدار اندیس حجمی لجن (SVI) و مصرف بهینة انرژی میگردد. | ||
کلیدواژهها | ||
تصفیه فاضلاب؛ حذف بار آلی؛ حذف فسفر و نیتروژن؛ راکتور ناپیوسته متوالی (SBR)؛ فناوری الکتروشیمیایی | ||
عنوان مقاله [English] | ||
Enhancing the Removal Efficiency of Organic Load, Phosphorus, and Ammonia in the Sequencing Batch Reactor (SBR) Wastewater Treatment by Employing Electrochemical Technology | ||
نویسندگان [English] | ||
Zahra Abolhasanzadeh؛ Gagik Badalians Gholikandi | ||
Department of Water and Wastewater Treatment , Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran,Iran | ||
چکیده [English] | ||
Objective: Advanced wastewater treatment plays a vital role in reducing environmental pollution and safeguarding water resources, particularly as industrialization and urban development continue to accelerate globally. Among the various treatment technologies available, electrochemical processes have emerged as a promising and innovative option, largely due to their effectiveness in eliminating resistant and hard-to-treat contaminants. These technologies not only offer high treatment efficiency and scalability but also exhibit strong potential for integration with traditional treatment systems, making them a practical enhancement to current infrastructure. Key goals of wastewater treatment include achieving high removal rates of organic pollutants, consistently meeting regulatory thresholds for nutrients like nitrogen and phosphorus in the effluent, and improving the overall operational efficiency of treatment processes, thus ensuring long-term sustainability and effectiveness in environmental management. Method: This study evaluates the integrated treatment strategy by examining the removal efficiencies of key pollutants, including organic matter, phosphorus, and ammoniacal nitrogen, alongside measurements of sludge volume index (SVI) and energy consumption across a voltage range of 1 to 15 volts. To ensure both practical relevance and methodological robustness, experiments were conducted using a combination of real and synthetic wastewater samples. Results: The findings revealed that applying voltages below 5 volts significantly enhanced the removal of organic contaminants, achieving up to a 1.5-fold improvement relative to conventional treatment systems. Notably, the system attained a peak organic load removal efficiency of 98% at an applied voltage of 3 volts. In parallel, phosphorus removal efficiency reached 99%, while ammoniacal nitrogen removal was observed at 69% within the 1–5 volt range. Beyond pollutant elimination, the incorporation of electrochemical technology notably improved sludge characteristics. The most substantial decrease in SVI occurred at 15 volts, reducing sludge volume to one-third of that observed in traditional sequencing batch reactor (SBR) systems over an equivalent operational period. Additionally, the system demonstrated favorable energy performance, with maximum energy consumption under optimal operating conditions measured at 1.78 kWh per cubic meter of treated wastewater. Conclusions: The findings of this study indicate that enhancing the conventional biological wastewater treatment system through the simultaneous application of the electrochemical method leads to increased efficiency in the removal of organic load, phosphorus, and ammonium, particularly at voltages below 5 V. Furthermore, the results suggest that, under optimal operating conditions, the integration of the electrochemical method reduces retention time, significantly improves the sludge volume index (SVI), and optimizes energy consumption, making the process more sustainable, environmentally friendly, and economically viable in the long term. | ||
کلیدواژهها [English] | ||
Electrochemical technology, Removal of organic load, Phosphorus and nitrogen, Sequencing Batch Reactor (SBR), Wastewater treatment | ||
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