Effect of operating factors on the contaminants removal of a soil filter: multi-soil-layering system

As a soil filter, the multi-soil-layering (MSL) system has several advantages over some other conventional soil-based systems, including higher hydraulic load rate (HLR) and lower probability of clogging. However, the role of operating factors on the performance of MSL is insufficiently understood, and this limits its further application to some extent. The present paper provides a holistic overview of the crucial operating parameters, including clogging and HLR, aeration, media composition and structure, temperature, and C/N ratio. In particular, clogging and HLR are discussed extensively, since they could cause much greater deterioration over the lifetime of the soil filter than the other factors. There are currently few relevant reports regarding the balance between maintaining the reasonable range of HLR and minimizing less chance of clogging. To fill this research gap, this paper proposes two applicable ways to reduce the opportunity for clogging, namely, system suspension and/or enhanced aeration, which will be time-saving and low cost. In addition, to increase the denitrification capacity of MSL, effluent recirculation is proposed, a novel recommendation based on the municipal wastewater treatment processes, which could also improve the controllability of MSL from the perspective of biochemical reaction.

[1]  Toshiyuki Wakatsuki,et al.  Effect of structural difference on wastewater treatment efficiency in multi-soil-layering systems: Relationship between soil mixture block size and removal efficiency of selected contaminants , 2007 .

[2]  Toshiyuki Wakatsuki,et al.  DIRECT TREATMENT OF POLLUTED RIVER WATER BY THE MULTI-SOIL-LAYERING METHOD , 2003 .

[3]  T. Wakatsuki,et al.  High Performance and N & P-Removable On-Site Domestic Waste Water Treatment System by Multi-Soil-Layering Method , 1993 .

[4]  A. Kadam,et al.  Treatment of municipal wastewater using laterite-based constructed soil filter , 2009 .

[5]  Li Chao,et al.  Study of improving nitrogen removal efficiency of two-stage multi-soil-layering filled zeolite in permeable layer , 2009 .

[6]  May A. Massoud,et al.  Decentralized approaches to wastewater treatment and management: applicability in developing countries. , 2009, Journal of environmental management.

[7]  A. Luo,et al.  Flow patterns of multi-soil-layering systems , 2014 .

[8]  Toshiyuki Wakatsuki,et al.  Characterization of Treatment Processes and Mechanisms of COD, Phosphorus and Nitrogen Removal in a Multi-Soil-Layering System , 2005 .

[9]  Tasnee Attanandana,et al.  Multi-media-layering system for food service wastewater treatment , 2000 .

[10]  Ü. Mander,et al.  A case study of the performance of pilot scale light weight aggregates (LWA) based hybrid soil filters in Estonia , 2010 .

[11]  Guangming Zeng,et al.  Novel two-stage vertical flow biofilter system for efficient treatment of decentralized domestic wastewater , 2014 .

[12]  Paul Knowles,et al.  Clogging in subsurface-flow treatment wetlands: Occurrence and contributing factors , 2011 .

[13]  T. Masunaga,et al.  Removing the N and P in Dairy Effluent using Multi-Soil-Layer (MSL) Systems , 2008 .

[14]  G. Oron,et al.  A pilot study of constructed wetlands using duckweed (Lemna gibba L.) for treatment of domestic primary effluent in Israel. , 2004, Water research.

[15]  Laura Ortiz,et al.  Initial contaminant removal performance factors in horizontal flow reed beds used for treating urban wastewater. , 2004, Water research.

[16]  Tasnee Attanandana,et al.  Effect of intermittent aeration regulation of a multi-soil-layering system on domestic wastewater treatment in Thailand , 2002 .

[17]  Toshiyuki Wakatsuki,et al.  Effect of aeration and material composition in soil mixture block on the removal of colored substances and chemical oxygen demand in livestock wastewater using multi-soil-layering systems , 2007 .

[18]  Miquel Salgot,et al.  Impact of design and operation variables on the performance of vertical-flow constructed wetlands and intermittent sand filters treating pond effluent. , 2009, Water research.

[19]  C. Baird,et al.  The pilot study. , 2000, Orthopedic nursing.

[20]  T. Vicent,et al.  Effect of influent COD/N ratio on biological nitrogen removal (BNR) from high-strength ammonium industrial wastewater , 2004 .

[21]  M G Healy,et al.  Treatment of dairy wastewater using constructed wetlands and intermittent sand filters. , 2007, Bioresource technology.

[22]  P. Havard,et al.  Effects of Hydraulic Loading Rate and Filter Length on the Performance of Lateral Flow Sand Filters for On-Site Wastewater Treatment , 2011 .

[23]  J. Rodríguez,et al.  Coke Wastewater Treatment by a Three-Step Activated Sludge System , 2008 .

[24]  Tasnee Attanandana,et al.  The efficiency of a multi-soil-layering system on domestic wastewater treatment during the ninth and tenth years of operation , 2001 .

[25]  Songming Zhu,et al.  The impact of temperature on nitrification rate in fixed film biofilters , 2002 .

[26]  Toshiyuki Wakatsuki,et al.  Water Movement Characteristics in a Multi-Soil-Layering System , 2005 .

[27]  Tasnee Attanandana,et al.  Effect of organic components and aeration regimes on the efficiency of a multi-soil-layering system for domestic wastewater treatment , 2002 .

[28]  P. Mccarty,et al.  Environmental Biotechnology: Principles and Applications , 2000 .

[29]  Toshiyuki Wakatsuki,et al.  Characteristics of wastewater treatment using a multi-soil-layering system in relation to wastewater contamination levels and hydraulic loading rates , 2007 .

[30]  Paul Rodgers,et al.  The Impact of Design , 2009 .

[31]  Tasnee Attanandana,et al.  Improving multi-soil-layer (MSL) system remediation of dairy effluent , 2008 .

[32]  D. C. Mays,et al.  Hydrodynamic and chemical factors in clogging by montmorillonite in porous media. , 2007, Environmental science & technology.

[33]  Zhang Shuai,et al.  Performance of multi-soil-layering system (MSL) treating leachate from rural unsanitary landfills. , 2012, The Science of the total environment.