An innovative design of septic tank for wastewater treatment and its performance evaluation： An applicable model for developing countries

作     者：Sajjad Haydar Mehwish Anis Gul E Hina Javed Anwar Aziz Mudasar Arbi 

作者机构：Institute of Environmental Engineering & Research (IEER) University of Engineering & Technology (UET) Lahore Pakistan University of Lahore Lahore Pakistan 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第4期

页      面：886-891页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Funding by the University of Engineering&Technology Lahore and support of lab staff 

主　　题：Wastewater treatment Septic tank Anaerobic baffled reactor 

摘      要：A study was carried out to evaluate the treatment efficiency of modified model of septic tank（ST）for the treatment of domestic *** objective was to explore the possibility of increasing the removal efficiency,at household level,thereby reducing cost and treatment burden on city level treatment *** this purpose,a bench scale model of ST was prepared and operated continuously for 78 days at different detention times i.e.,48,24 and 12 h and at two reactor temperatures viz.15℃ and 25℃.Domestic wastewater was fed to the bench scale ST without *** was conducted under two different ***,by installing baffles in the bench scale ST（called Run-1 setup）,and secondly by installing perforated plates between the baffles（called Run-2 setup）.Results demonstrated that Run-2 setup is better than Run-1 *** significantly affects the *** time of 24 h was found ***-2 setup demonstrated a percentage BOD removal of 45%with effluent BOD of 113 mg·L^-1 at 15℃ and 85%removal with effluent BOD of 31 mg·L^-1 at 25℃.It is concluded that if a modified design of ST using Run-2 setup is provided at household level,the effluent coming out of the house will meet the National Environmental Quality Standards（NEQS）when reactor temperature is close to 25℃.Development authorities are suggested to change their by-laws and make modified ST mandatory for all *** may significantly reduce the cost and footprint of city level wastewater treatment plants being planned.