Biological nutrient removal using a novel five-step continuous flow activated sludge process technology

• Autorzy: Abualhai S. , Naseer R. , Xiwu L.
• Języki publikacji: EN

Abstrakty

EN

An anaerobic-anoxic/oxic (AA/O) five-tank biological process called five-step continuous flow activated sludge process (FSCFASP) was developed to force the oscillation of organic matter and nutrient concentrations in process reactors. The run scheme and schematic diagram of FSCFASP was described. The run cycle was divided into two symmetrical half cycles with eight periods during each cycle. The duration of each period was established according to biological process requirements. The optimal running times of the periods were 90, 60, 60, 30, 90, 60,6 0 and 30 min at the HRT of 16 h, air/water ratio of 35% and SRT of 21 day at the temperature range of 19-23 °C. The optimized system achieved 88.09±1.43%, 90.33±2.9%, 68.83±5.34% and 87.67±2.9% of the chemical oxygen demand, NH4+-N, TN, and TP removal efficiencies, respectively, during a 11-month operation with the effluent meeting the Chinese sewage discharge standard GB18918-2002 (level A). Simultaneous nitrification and denitrification phenomena were observed in the tank one which is important to reduce the quantity of aeration and the duration of a next anoxic state. Compared with other existing technologies, this system achieved high nitrogen and phosphorus removal without equipment of sludge and mixed liquor return. Thus, it is effective for reducing energy consumption.

Słowa kluczowe

EN

nitrogen removal; activated sludge process; chemical oxygen demand; sewage; nutrient removal; biological processes; nutrient concentrations

PL

usuwanie azotu; zapotrzebowanie chemiczne na tlen; ścieki; biologiczne usuwanie składników odżywczych; proces biologiczny; stężenie substancji odżywczych; metoda osadu czynnego; proces osadu czynnego

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2013
• Tom: Vol. 39, nr 3
• Strony: 165--184
• Opis fizyczny: Bibliogr. 19 poz., tab., rys.

Twórcy

autor

Abualhai S.

• Faculty of Engineering, University of Basrah, Basra, Iraq
• School of Energy and Environment, Southeast University, Sipailou Road, Nanjing 210096, PR China, Engineering Research Center of Taihu Lake Water Environment, Southeast University, Linghu Avenue Road, Wuxi 214135, China

autor

Naseer R.

• Faculty of Engineering, University of Basrah, Basra, Iraq
• School of Energy and Environment, Southeast University, Sipailou Road, Nanjing 210096, PR China, Engineering Research Center of Taihu Lake Water Environment, Southeast University, Linghu Avenue Road, Wuxi 214135, China

autor

Xiwu L.

• School of Energy and Environment, Southeast University, Sipailou Road, Nanjing 210096, PR China, Engineering Research Center of Taihu Lake Water Environment, Southeast University, Linghu Avenue Road, Wuxi 214135, China

Bibliografia

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