Analysis of horizontal subsurface flow constructed wetland planted with napier grass (Pennisetum purpureum Schumach) as vegetation for irrigation reuse

Date

2018

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Marloe B. Sundo

Abstract

Water as a basic commodity in everyday life for community and industry plays a vital role in daily life and operations. However, its availability in the future with vast demands gives a sustainability problem. Agricultural wastewater can be collected and treated using natural systems like constructed wetlands to provide sustainable water source in agriculture. This study focused on the performance of a horizontal subsurface flow constructed wetlands on the removal of fecal coliform, total dissolved solids (TDS), nitrate, and nitrite. Also, variation in electrical conductivity (EC) and pH was analyzed. These parameters were compared to the limits set by DENR and DA for Class C, landscape irrigation for non-food crops. Removal efficiency for TDS peaked at 19%; nitrate performed up to 85% removal with increasing trend; nitrite and fecal coliform were variable with inconsistent performance. Statistically significant performance was observed on TDS, nitrite, and EC. Increasing pH level from an acidic influent approaching alkalinity was also observed. All parameters fell within allowable range except fecal coliform and were suitable for Class C, landscape irrigation provided that there will be minimal human and animal contact and no crop is to be eaten directly or indirectly. With an addition of a downstream disinfection tank, horizontal subsurface flow systems can provide a sustainable water resource in farms and in agriculture.

Language

English

LC Subject

Constructed wetlands, Pennisetum purpureum, Enterobacteriaceae, Sewage irrigation

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2018 E63

Document Type

Thesis

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