Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 6, Issue 5, Pages 5706-5711Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2018.08.067
Keywords
Constructed wetland; Constructed floating wetland; Floating system; Domestic sewage treatment; Typha domingensis Pers; Macrophytes
Categories
Funding
- COMUSA (Water & Sewerage Services to Novo Hamburgo) [0004/2013]
- CAPES - Brazil
- CNPq - Brazil
- BNDES - Brazil
- SCIT - Brazil
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A constructed foaling wetland using macrophytes Typha domingensis Pers. was applied to the treatment of raw sewage in a municipal sewage treatment plant in south Brazil. During 12 months, the average removal of organic matter was evaluated by chemical oxygen demand (COD), 5-day biochemical oxygen demand (BOD5) and by total suspended solids (TSS) analysis and a removal efficiency of 55, 56 and 78% was, respectively, obtained. For nutrients, total Kjeldahl nitrogen (TKN) was reduced in 41% and total phosphorus, in 37%. The foaling mats supported satisfactorily the macrophytes. This foaling arrangement was applied as a single step on the sewage treatment. It is an effective alternative in Brazilian sewage treatment systems, where wetlands are normally used as a polishing step. The evaluation of parameters in the treatment system may give useful information in order to improve the removal efficiency and increase the quality of the water bodies.
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