Construction and maintenance cost analyzing of constructed wetland systems

摘要

Nowadays, use of constructed wetlands for wastewater treatment especially in rural areas has becomenincreasingly preferable. The most important reason behind this fact is its relatively low investment cost overnother treatment options depending on economical conditions of the country. Nonetheless, due to lowernoperational costs of constructed wetlands than other conventional wastewater treatment systems,ninvestment costs could be regarded secondary as of importance. Investment costs could show differencesneven at regional scale in a country. Choosing a constructed wetland system among “Subsurface HorizontalnFlow”, “Subsurface Vertical Flow” or “Free Water Surface Flow”; or designing a hybrid system usingnconcurrent systems plays important role when defining costs of the constructed wetland systems. Due tonincreasing interest for constructed wetlands since 2003, so many constructed wetland systems have beennbuilt in rural parts of Turkey and most of these systems have been designed as horizontal subsurface flownconstructed wetland system. As a fact, the cost of horizontal subsurface flow constructed wetlands isncomparatively higher than other wetland systems. When different applications in the world are examined, it isnobserved that mostly horizontal subsurface flow constructed wetland systems are preferred in rural areas.nAccording to the studies within the extent of this work, different constructed wetland types which are built inndifferent regions of Turkey and their expected and realized costs are analyzed and compared with otherncountries. Moreover, operational costs have been calculated. Consequently, a work to be taken as referencenfor further scientific studies has been prepared with presented wetland analyses which could be used bynespecially decision makers and researchers.