Municipal wastewater treatment using novel constructed soil filter system

Kadam, Avinash M.; Oza, Goldie; Nemade, P.D.; Dutta, Supritam; Shankar, H. S.

doi:10.1016/j.chemosphere.2007.11.048

Cited by 42 publications

(21 citation statements)

References 17 publications

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“…Fig.6 showed the removal efficiency of TP in VMSI system. The VMSI system was excellent in removing TP with 91.83% of average removal efficiency (similar with Kadam and Heistad's study [16][17] ). The highest removal efficiency was above to 99.87% was showed in fig.6.…”

Section: B Ammonia Nitrogen Removalsupporting

confidence: 87%

Pollutants Removal from Municipal Wastewater Using Vertical Multilevel Soil Infiltration System

Yang

Feng

Hou

2010

2010 4th International Conference on Bioinformatics and Biomedical Engineering

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In this study, we have investigated the effect of pollutants removal of a vertical multilevel soil infiltration (VMSI) system on municipal wastewater treatment. The VMSI was of 30cm*20cm*50cm column, in which combined stuffing consisted of soil, quartz sand, active carbon and scrap irons were packed. As a result, VMSI system exhibited excellent removal efficiency with 91.7% of COD, 98.4% of NH 4 + -N, 81.0% of TN and 97.3% of TP. Moreover, the proportion of biological and abiological effects in pollutants removal was also investigated through different reactor, and abiological effect against organic removal was 53-62%. In a long-term performance, the VMSI system exhibited excellent ability and stability in pollutants removal. Keywords-VMSI； combined stuffing； municipal waste-water； external carbon sourcesI.

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Section: B Ammonia Nitrogen Removalsupporting

confidence: 87%

Pollutants Removal from Municipal Wastewater Using Vertical Multilevel Soil Infiltration System

Yang

Feng

Hou

2010

2010 4th International Conference on Bioinformatics and Biomedical Engineering

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“…CSF has its own ecology and oxygen reservoir as effluent DO >5.0 mg/l in water samples. [37] The concentration of the DO in the liquid phase throughout the filter depth was always ranging from 5.0 to 5.25 mg/l, which is sufficient to oxidize Fe(II) to Fe(III) forming Fe(OH) 3 that was detained on the support material of the filter. The residual iron is <0.30 mg/l which is the permissible limit for drinking water.…”

Section: Resultsmentioning

confidence: 99%

Arsenic and iron removal from water using constructed soil filter—a novel approach

Nemade

Kadam

Shankar

2008

Asia-Pacific J Chem Eng

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Arsenic poisoning is a global problem. It is known that groundwater in Bangladesh and West Bengal predominantly contains As(III) and concentrations of Fe(II) which are often too low for removal of arsenic in optimum quantities. To eliminate arsenic from drinking water, several basic methods such as coagulation, adsorption, ion exchange, filtration, membrane processes, are reported. To deal with this issue on a small to large scale, we present a novel approach to remove arsenic and iron from water by constructed soil filter (CSF).In CSF, As (III) is oxidized to As(V) by media via natural oxidation and subsequently, arsenic is co-precipitated with iron. Here water containing arsenic, iron, and phosphate is passed through the CSF media at the rate of 100 ml/min. Results show a mean residence time of 8.6 min and a holdup of 1.85 l. Results of six runs show that with initial As(III) of 300 µg/l and iron concentration of 5-10 mg/l, residual arsenic levels below 10 ppb and residual iron <0.30 mg/l in water can be achieved.In CSF, no chemicals are needed for the oxidation of As(III) to As(V). The oxidation takes place due to the presence of various oxides such as iron, manganese, aluminum, and the microbial diversity in the media of soil bioreactor. Such a novel technology is also applied for purification of water and wastewater. 

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“…Both BOD and COD show significant reduction from 350 mg/l to 20 mg/l and 211 mg/l to 7.0 mg/l respectively. Significant improvement in the clarity of water due to suspended solids removal (293 mg/l to 16 mg/l) from was observed [25]. Similarly, Zhang et al [26] studied the Soil infiltration treatment (SIT) which gives 94.5% COD removal from wastewater.…”

Section: Csf Performancementioning

confidence: 94%

“…The CSF plants show high COD, BOD, ammoniacal-N, nitrite-N, suspended solids, turbidity, and pathogen removal [25]. Earlier work on CSF indicates that for organic loading <0.15 kg/m 2 d, hydraulic loading <0.05 m 3 /m 2 h and reduction potentials of >600 mV are typical in CSF [21].…”

Section: Csf Performancementioning

confidence: 94%