A New Soil Inflltration Technology for Decentralized Sewage Treatment: Two-Stage Anaerobic Tank and Soil Trench System1
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Cited by (18)
Effect of intermittent operation and shunt wastewater on pollutant removal and microbial community changes in subsurface wastewater infiltration system
2022, Process Safety and Environmental ProtectionNitrogen removal from rural domestic wastewater by subsurface wastewater infiltration system: A review
2022, Process Safety and Environmental ProtectionCitation Excerpt :SWIS nitrogen removal efficiency ranges from 10% to 90%, depending on the wastewater composition, environmental conditions, and operating conditions. Most studies have shown that the TN removal efficiency of SWIS is usually maintained between 20% and 55% (Ye et al., 2008; Zou et al., 2008). Especially in the case of high HLR, the system TN removal efficiency is often less than 20% (Wang, Zhang, 2017).
Effect of long-term operation of a subsurface wastewater infiltration system (SWIS) based on the limiting value of environmental carrying capacity
2016, Ecological EngineeringCitation Excerpt :This system is suitable for combining green space with the treated and dispersed domestic sewage of rural and urban areas, especially resorts and tourist areas. Since the 1980s, researches on sewage treatment by SWIS in China (Gao and Li, 1991) have made progress in the mechanism, operation conditions and process improvement of SWIS (Zhang et al., 2005; Ye et al., 2008; Wang et al., 2010; Zhang et al., 2011; Qin et al., 2014). The results of various studies indicated that the removal rates in terms of chemical oxygen demand (CODMn), biological oxygen demands (BOD5), total phosphorus (TP), suspended solid (SS) and health indicators are generally satisfactory (Sun et al., 1998; Yang et al., 1999; Zhang et al., 2011; Llorens et al., 2011; Li et al., 2012).
Nitrogen removal processes in deep subsurface wastewater infiltration systems
2015, Ecological EngineeringCitation Excerpt :In conventional SWIS treatment, wastewater is first treated by conventional physical–chemical and/or biological methods in a septic tank and then is allowed to infiltrate through an aerated unsaturated zone where it is purified through processes such as filtration, adsorption, chemical reactions and biodegradation (Zhang et al., 2005). The advantages of SWIS over conventional activated sludge (CAS) and biofilm systems have been reported and include lower construction and operational costs, better performance for organic substance and phosphorus removal, easier management and maintenance (USEPA, 2002; Yamaguchi et al., 1996; Ye et al., 2008). Although SWIS has been successful for removing pollutants from various wastewaters, its capacity and efficiency remains low regarding nitrogen removal (Kong et al., 2004; Sun et al., 1998).
Application of subsurface wastewater infiltration system to on-site treatment of domestic sewage under high hydraulic loading rate
2015, Water Science and EngineeringCitation Excerpt :The SS removal process in the SWIS is based on sedimentation, adsorption, and biological processes. Previous studies have revealed that the permanent removal of SS usually occurs in the subsurface with the effect of aluminum/iron compounds (Oladoja and Ademoroti, 2006; Yang et al., 2007; Ye et al., 2008). Furthermore, studies have shown that the SS reduction capacity decreases with time because the mineral sediments become fully saturated within the infiltration system (Hand et al., 2008; Morkved et al., 2007; Zhang et al., 2005).
Effect of Fulvic Acid on the Denitrification in Deep Subsurface Wastewater Infiltration System
2023, Nature Environment and Pollution Technology
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Project supported by the National High Technology Research and Development Program (863 Program) of China (No. 2002AA601012-01).