Electronic Resource
Low strength and COD/N wastewater treatment via controlled nitrification by a membrane aerated biofilm, partial denitrification by activated sludge, and anaerobic ammonia oxidation by granular sludge
| العنوان: | Low strength and COD/N wastewater treatment via controlled nitrification by a membrane aerated biofilm, partial denitrification by activated sludge, and anaerobic ammonia oxidation by granular sludge |
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| المؤلفون: | Rong, HW, Jiang, YD, Luo, ZQ, Wei, CH, Jiang, X, Zhang, LQ, Ngo, HH |
| بيانات النشر: | Royal Society of Chemistry (RSC) 2023-01-17 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | A hybrid process of controlled nitrification by a membrane aerated biofilm (MAB), partial denitrification (PD) by activated sludge, and anaerobic ammonia oxidation (ANAMMOX) by granular sludge was proposed for synthetic low strength and COD/N wastewater treatment to address the challenges of stable nitritation and limited carbon source for nitrogen removal in this study. Batch tests with different aeration pressures showed that MAB achieved an ammonia-nitrogen removal of around 57% and nearly full nitrification under aeration pressure of 6 kPa and reaction time of 9 h, resulting in appropriate conditions for subsequent PD and ANAMMOX. Batch tests with different COD/N ratios revealed that PD activated sludge achieved an average 88% conversion from nitrate to nitrite and a nitrite-nitrogen production rate of 1.24 mg L−1 min−1 under the optimal initial COD/N of 3.5 and MLVSS of 1.3 g L−1. Batch tests on ANAMMOX showed a nitrite-nitrogen consumption rate of 0.13 mg L−1 min−1 under granular sludge MLVSS of 13 g L−1. Furthermore, batch tests mixing PD activated sludge and ANAMMOX granular sludge demonstrated an optimal seeding sludge weight ratio of 1 : 10 for simultaneous nitrate and ammonia removal. Finally, the hybrid process of controlled nitrification by MAB, PD by activated sludge, and ANAMMOX by granular sludge was established to treat synthetic low strength and COD/N wastewater (COD of 175 mg L−1, ammonia-nitrogen of 100 mg L−1). After 10 cycles of operation with a reaction time of 9 h, the effluent ammonia-nitrogen decreased to below 10 mg L−1, nitrate and nitrite nitrogen were below 3 mg L−1, and COD was below 50 mg L−1, achieving simultaneous carbon and nitrogen removal capacity of 0.36 gCOD L−1 d−1 and 0.23 gN L−1 d−1, respectively. |
| مصطلحات الفهرس: | 0399 Other Chemical Sciences, 0905 Civil Engineering, 0907 Environmental Engineering, Journal Article |
| URL: | Environmental Science: Water Research and Technology 10.1039/d2ew00887d |
| الاتاحة: | Open access content. Open access content info:eu-repo/semantics/closedAccess |
| Other Numbers: | LT1 oai:opus.lib.uts.edu.au:10453/176375 Environmental Science: Water Research and Technology, 2023, 9, (3), pp. 910-921 2053-1400 2053-1419 1439679735 |
| المصدر المساهم: | UNIV OF TECH, SYDNEY From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1439679735 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |