A comparative study between pebble and gravel as filter in a small scale airlift aquaponics system.

Date

4-2012

Degree

Bachelor of Science in Agricultural and Biosystems Engineering

Major Course

Major in Land & Water Resources Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Aurelio A. Delos Reyes, Jr.

Restrictions

Restricted: Not available to the general public and to those bound by the confidentiality agreement. Access is available only after consultation with author/thesis adviser.

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Abstract

The filtration performance of gravel and pebbles in a small-scale aquaponics system with tilapia and celery were evaluated and compared. Mineralization of solid wastes, mainly fecal wastes, was allowed in the filter to utilize all waste produced by fish as nutrients for plants. At various times of sampling, production, conversion and removal of ammonia was observed in the filter. Positive rates for ammonia removal indicated net ammonia removal, while negative values indicated net ammonia production. Zero ammonia removal was also observed, meaning that production and removal were almost equal. A decreasing trend in nitrite level was also observed in the system indicating full filter acclimation. Nitrite rates were observed higher than the consumption rate by celery in the hydroponic bed. Apparent color improved through the filters, indicative of their solid removal capability. Orthosphate, temperature, dissolved oxygen, pH and alkalinity were measured and observed to be within allowable range for fish and plant growth. Celery growth was observed to be slightly better in the gravel system than in the pebble system The difference between celery, grown celery growth was possibly an effect of other unmeasured parameters.

Language

English

LC Subject

Aquaponics, Pebbles--Comparative studies, Gravel--Comparative studies.

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993.5 2012 A2 S23

Document Type

Thesis

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