ENGINEERING JOURNAL : PENGOLAHAN AIR BEKAS DOMESTIK DENGAN SISTEM CONSTRUCTED WETLAND UNTUK MENURUNKAN COD DAN DETERJEN (LAS)

Jurnal Rekayasa Vol 4 No 1 Artikel 10

Yeny Dhokhikah
(Staf pengajar Jurusan Teknik Sipil, PS Teknik, Universitas Jember)

ABSTRACT

Grey water is wastewater from domestic activities like bathing, washing, laundering and dishes washing from kitchen. Most of all of grey water enter the water body without previous treatment. Wetland is a kind of treatment that use natural resources like soil and sandy soil as medium with in the process occurs, plants and microorganisms as decomposer. Previous studies have shown that grey water can be treated by wetland which planted by cattail (Typha angustifolia) and canna-lilies (Canna sp.). Aim of this research was to estimate the removal efficiencies of COD and detergent in grey water in application of subsurface flow constructed wetland. This research had variable of species of plants (cattail and canna). It also used detention time 6 hours and the dimension of reactor in length, width and depth were 0,55 m; 0,55 m; 0,5 m. Sand was used as medium with 0,4 m in depth and the system had continuous flow. The observation was held for 8 days. The results of research were the highest removal efficiency of COD 62%, LAS 33% in reactor planted by cattail. The highest of removal efficiency of COD was 46% and LAS was 40%, which removal of organicmatter and detergent by medium, because it had fuction as filter. The short detention time in wetland had influence to the removal efficiencies of COD and LAS.

Keywords: grey water, subsurface flow constructed wetland, cattail, canna-lilies

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