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Biodegradation of organic content via activated sludge seeding coupled with aeration in simulated self-purification sewer system
التحلل البايولوحي للملوثات العضوية بواسطة الاطيان المنشطة المعززة بالتهوية في منظومة محاكاة للمجاري ذاتية التنقية

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Abstract

Partial degradation of organic materials presented in sewage water had been conducted in the current research in a simulated sewer system. The process had been improved by aeration and seeding with activated sludge to reveal the effect of increasing the amount of biomass in the system. Three ambient temperatures were conducted as 10, 20, and 30 OC to display the influence of temperature on the degradation process. The results revealed that adding activated sludge to the system in a ratio of 50/50 (v/v) had a significant influence on the degradation as more microorganisms required more organic nutrients. In the other hand, increasing the operating temperature indicated positive influence in terms of soluble chemical oxygen demand (SCOD) removal as temperature motivated the living biomass towards severe degradation.

تم في هذا البحث دراسة التحلل الجزئي للمواد العضوية الموجودة في مياه المجاري بواسطة منظومة محاكاة لنظام التصريف. تم تعزيز النظام بالتهوية المستمرة والاطيان المنشطة لمعرفة تأثير زيادة كمية الاحياء المجهرية الموجودة في النظام. تم اختبار النظام تحت ثلاثة درجات حرارة محيطية 10, 20, و 30 درجة مئوية لمعرفة تأثير درجات الحرارة على عملية التحلل. اظهرت النتائج ان اضافة الاطيان المنشطة بنسبة 50 /50 (حجم / حجم) ادت الى تأثير ايجابي على التحلل حيث ان ازدياد كمية الاحياء المجهرية تتطلب ازدياد في المواد العضوية المتحللة. من جانب اخر, ادت زيادة درجة الحرارة المحيطية الى ازدياد ايجابي في ازالة الاوكسجين المتطلب كيمياويا حيث تؤدي زيادة درجة الحرارة الى زيادة نشاط الاحياء المجهرية مؤدية الى زيادة في تحلل المواد العضوية.


Article
Studying the Effect of Ambient Temperature on Wastewater Degradation in Simulated SelfPurification Aerated Sewer System

Authors: Tala A. Al-Khateeb --- Riyad H. Al-Anbari --- Kareem K. Al-Jumaili
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 1 Part (C) Pages: 5-10
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Designing and operating a simulated gravity sewer system had beenaccomplished in the current research. The design had been provided withaeration system in order to deliver oxygen to microorganisms presented insewage water. The system had been used in three different seasons in order toinvestigate the ambient temperature effect on treating wastewater. The resultsrevealed that ambient temperature had a significant role in organic wastedegradation powered by the presence of air into sewage pipes and level tanks.Maximum degradation measured in terms of chemical oxygen demand removal(RCOD) was recorded to be 14.28 under 30 OC ambient temperature and 8 hr oftreating time. The results recorded from the current system seemed to bepromising in terms of self-purification ability of the transporting sewer system.

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