Soil Chemical Analysis

Climate change 2014 - Synthesis Report

Treatment of dairy wastewater using constructed wetlands and intermittent sand filters.

In the last few decades, fly ash, a coal combustion residue, has been used as a raw material for synthesis of microporous aluminosiliceous minerals known as zeolites. Due to their excellent ion exchange capacity, high surface area and unique pore characteristics, zeolites have been used for removal of heavy metals (viz., As, Cd, Cr, Cs, Cu, Fe, Hg, Mn, Ni, Pb, Sr, W and Zn) and ionic species (viz., ammonium, chloride, fluoride, nitrate, phosphate and sulphate) from industrial sludges, acid mine drainage and wastewater from domestic and industrial sources. In addition, fly ash zeolites find their application as sorbent medium in permeable reactive barriers and contaminant barrier liners for immobilizing the contaminant plume in soil. This paper reviews the applications of fly ash zeolites in various water treatment studies and other related environmental cleanup projects, viz., depuration of wastewater containing industrial dyes and hazardous ions and leachate treatment. Furthermore, novel applications in the use of fly ash zeolites as permeable reactive barriers and contaminant barrier liners as well as the future scope of research for environmental cleanup are also discussed.

Fly ash zeolites for water treatment applications

Performance of system consisting of vertical flow trickling filter and horizontal flow multi-soil-layering reactor for treatment of rural wastewater.

The efficiency of a multi-soil-layering system on domestic wastewater treatment during the ninth and tenth years of operation

Effect of intermittent aeration regulation of a multi-soil-layering system on domestic wastewater treatment in Thailand

Multi-media-layering system for food service wastewater treatment

Multi-soil-layering (MSL) system can be applied to wastewater treatment. The component of an MSL system can be varied as a function of site-specific availability of materials. This study investigates the comparative efficiency of five MSL systems as a function of alternative organic materials (Japanese sawdust, Thai sawdust, rice straw, kenaf, and corncob). The MSL systems were set up in 15 × 50 × 100 cm boxes consisting of “soil mixture blocks” alternated with a zeolite layer. The February–May 1999 results indicated that all the MSL systems under a non-aeration regime effectively reduced the biochemical oxygen demand (BOD5) and removed soluble reactive phosphorus (SRP) with percentages ranging from 88.0–99.8 and 92.5–100, respectively. From January to September 2000 when an on-off aeration regime was adopted, the MSL treatments comprising rice straw, kenaf, and corncob continued to effectively reduce BOD5 and remove SRP. On the other hand, the efficiency of Japanese sawdust and Thai sawdust MSL ...

https://www.tandfonline.com/doi/pdf/10.1080/00380768.2002.10409182

Effect of organic components and aeration regimes on the efficiency of a multi-soil-layering system for domestic wastewater treatment

Multi-soil-layering (MSL) system was designed for purifying domestic wastewater and for treating polluted river water. MSL system is typically comprised of layers of soil mixture blocks alternating with permeable layers. The permeable layer has roles of preventing clogging and to increasing the efficiency of infiltration of wastewater through the soil mixture blocks. In this study, the comparative efficiency of five MSL systems as a function of five permeable layer materials (zeolite, zeolitized perlite, perlite, gravel, and charcoal) was investigated. The MSL systems were constructed in 15 × 50 × 100 cm boxes where the soil mixture blocks contained sandy clay soil, kenaf + corncob, and iron scraps at a ratio of 6 : 1 : 1 by weight, respectively, and filled up in alternation with the permeable layer. The results indicated that all the MSL systems at loading rates of 96–346 L m−2 d−1 under nonaerated conditions were able to reduce the levels of COD (342–1,231 mg L−1), BOD5 (201–802 mg L−1), and so...

https://www.tandfonline.com/doi/pdf/10.1080/00380768.2003.10410350

A comparative study of permeable layer materials and aeration regime on efficiency of multi-soil-layering system for domestic wastewater treatment in Thailand

S Luanmanee

Papers

The efficiency of a multi-soil-layering system on domestic wastewater treatment during the ninth and tenth years of operation

Effect of intermittent aeration regulation of a multi-soil-layering system on domestic wastewater treatment in Thailand

Multi-media-layering system for food service wastewater treatment

Effect of organic components and aeration regimes on the efficiency of a multi-soil-layering system for domestic wastewater treatment

A comparative study of permeable layer materials and aeration regime on efficiency of multi-soil-layering system for domestic wastewater treatment in Thailand