Water quality dependence on the depth of the vadose zone in SAT-simulated soil columns

Cha, Wol-Suk; Choi, Heechul; Kim, J.; Cho, J.

doi:10.2166/ws.2005.0003

Cited by 8 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 75th OPD with 30, 60, 90, 120 and 150 cm of depth NO 3 --N have a value of 0.6, 8, 25, 25 and 26 mg L −1 respectively. This agrees with results found by Cha et al (2005) which indicates a significant fraction of ammonia nitrogen is fixed in first centimeters of filer bed. Nevertheless, at outlet of column, treated wastewater does not exceed 26 mg L −1 it's conformed to standards Tunisian NT.106.02 rejection (50 mg L −1 ).…”

Section: Nitrogen Removalsupporting

confidence: 93%

Physicochemical and Microbial Caracteristics Performency in Wastewater Treated Under Aerobic Reactor

Rajeb¹

2011

American Journal of Environmental Sciences

View full text Add to dashboard Cite

Problem statement: The current work study the efficiency of biological wastewater treatment by an aerobic reactor which could be used in small agglomerations. RBC reduced physicochemical and microbiological load of wastewater but values remain above Tunisian standard. Approach: Experiments were conducted on a sand filled PVC column fed with wastewater treated by Rotating Biological Contactor (RBC) at a pulsed rhythm of 8 sequences per day. For performances study process, physicochemical and bacterial analyses effluent at inlet and outlet of column were realized. Results: The results showed that through filter mass (D10 = 0.55 mm, D60 = 1.3 mm and coefficient uniformity = 2.36) 96% of suspended solids, 99% of NH₄ ⁺-N (during first phase), 92% of COD, 91% of BOD₅ and 46% of phosphorus are retained by surface filtration. The microbial abatement results is <1.6 Log units of indicators fecal contamination (fecal coliforms, fecal streptococci and E. coli). The microbial water quality is slightly higher than Tunisian standards. The removal of microbial indicators in the considered reactor depends on the depth of the filter and negatively correlated with NO₃ ^--N (r = -0.99, with E. coli at 3rd OPD). Conclusion/Recommendation: Results confirmed that the reactor tested is performed as an advanced treatment system for DBO, COD, SS, NH₄ ⁺-N and NO₃^--N. Despite that 96% of SS efficiency reduction, clogging is not achieved quickly that due to biofilm detachment phenomena. The removal of microbial indicators in the considered reactor depends on the depth of the filter and negatively correlated with NO₃^--N. Disinfection performances for the considered reactor reduce microbial load, however chlore, ozone or UV disinfection should be considered.

show abstract

Section: Nitrogen Removalsupporting

confidence: 93%

Physicochemical and Microbial Caracteristics Performency in Wastewater Treated Under Aerobic Reactor

Rajeb¹

2011

American Journal of Environmental Sciences

View full text Add to dashboard Cite

show abstract

“…process (Essandoh et al 2013;Cha et al 2005;Harun 2007). No clogging of the column was observed during the experiments conducted with secondary effluents.…”

Section: Resultsmentioning

confidence: 99%

“…Several field and laboratory-scale studies have been carried out around the world to determine the effectiveness of SAT at removing specific pollutants from treated wastewater effluents (Fox 2001;Cha et al 2005; Drewes et al 1999;Essandoh et al 2013;Essandoh et al 2011;Fox et al 2005;Harun 2007;NCSWS 2001; D r a f t Quanrud et al 2003;Sharma et al 2008). SAT for CSOs has not been as extensively investigated as secondary and tertiary effluents.…”

Section: Introductionmentioning

confidence: 99%

Soil aquifer treatment of secondary effluents and combined sewer overflows in highly permeable soils typical of southwestern Ontario

Yanful

Sun

2017

Can. J. Civ. Eng.

View full text Add to dashboard Cite

Wastewater reclamation is becoming an important alternative for sustainable water resources management and building climate change resiliency in many regions around the world. This research investigated the polishing of secondary effluents and combined sewer overflows (CSOs) by a laboratory-scale soil aquifer treatment considering local soils and wastewater characteristics of southwestern Ontario. Results show that high permeability soils of southwestern Ontario, have the ability to polish secondary effluents in terms of dissolved organic carbon, Escherichia coli, and total coliforms. Regarding the simulated CSOs, low to moderate improvements of wastewater quality were observed. Denitrification of secondary effluents improved significantly by the addition of readily available organic matter, which supports the importance of protecting recharge wetlands for groundwater quality protection. Soil aquifer treatment in southwestern Ontario is a feasible alternative for the recharge of non-potable and potable aquifers with secondary effluents. However, for potable aquifers further treatment of wastewater effluents may be required.

show abstract

The role of agricultural activity for ammonium contamination at a riverbank filtration site in central Delhi (India)

et al. 2016

View full text Add to dashboard Cite

Water quality dependence on the depth of the vadose zone in SAT-simulated soil columns

Cited by 8 publications

References 14 publications

Physicochemical and Microbial Caracteristics Performency in Wastewater Treated Under Aerobic Reactor

Physicochemical and Microbial Caracteristics Performency in Wastewater Treated Under Aerobic Reactor

Soil aquifer treatment of secondary effluents and combined sewer overflows in highly permeable soils typical of southwestern Ontario

The role of agricultural activity for ammonium contamination at a riverbank filtration site in central Delhi (India)

Contact Info

Product

Resources

About