TY  - GEN
CY  - UNIVERSITAS LAMPUNG
ID  - eprints23028
UR  - http://digilib.unila.ac.id/23028/
A1  -  YUTI KARDIN,  1014111065
Y1  - 2016/06/07/
N2  - Penurunan kualitas air dapat disebabkan oleh akumulasi bahan organik dan
anorganik dari sisa metabolisme dan sisa pakan. Konsentrasi bahan organik dan
anorganik yang tinggi pada suatu media budidaya akan mempengaruhi proses
metabolisme ikan bahkan dapat menyebabkan kematian pada ikan. Salah satu cara
untuk mengatasi hal tersebut adalah dengan mengaplikasikan sistem resirkulasi.
Penambahan filter yang berbeda pada sistem ini diharapkan mampu menjadi wadah
bakteri pengurai amoniak dan fosfat tumbuh sehingga dapat mengoptimalkan
kualitas air. Penelitian ini bertujuan untuk mengetahui korelasi konsentrasi amoniak,
nitrit, nitrat dan fosfat dengan kepadatan bakteri pada filter yang berbeda. Penelitian
ini dilaksanakan pada bulan Juni sampai Juli 2015 di Jurusan Budidaya Perairan
Universitas Lampung. Desain penelitian mengikuti Rancangan Acak Lengkap (RAL)
dengan tiga perlakuan filter ijuk, spons dan pecahan karang dengan 3 kali ulangan.
Analisis data menggunakan metode korelasi dan uji regresi. Hasil penelitian
menunjukan bahwa penggunaan filter yang berbeda mampu berkorelasi positif
terhadap bakteri pengurai amoniak dan fosfat, sehingga mampu menekan konsentrasi
amoniak (P=0,024) dan fosfat (P=0,002) secara signifikan. Korelasi kepadatan
bakteri dan konsentrasi amoniak terbaik ditemukan pada filter pecahan karang
sebesar 0,739. Pecahan karang diduga memiliki permukaan yang luas dan beronggarongga
tempat bakteri menempel. Korelasi kepadatan bakteri dan konsentrasi fosfat
terbaik ditemukan pada filter ijuk sebesar 0,881, diduga terjadi karena penumpukan
sisa pakan dan feses pada dasar filter yang mengakibatkan kondisi menjadi anaerob
sehingga bakteri pengurai fosfat dapat tumbuh secara maksimal.
Kata kunci : kualitas air, resirkulasi, kepadatan bakteri, amoniak dan fosfat

abstract

The reduction of water quality could be caused by the accumulation of organic
matters and inorganic of metabolic waste and uneaten feed. High concentration of
organic matter and inorganic in cultivation media would affect to the metabolism of
fish and cause mortality. One way to overcome the problem was to apply a
recirculation system. The use of different filters in the system were expected to be a
container for bacterial decomposition of ammonia and phosphate so that the water
quality could be optimized. The aim of this study was to determine the correlation of
ammonia, nitrite, nitrate and phosphate concentration to the density of bacteria on
different filters. The research was conducted from June until July 2015 Department of
Aquacultur, Lampung University. The implemented experimental design was
completely randomized design with three treatments and three replicates, they were :
palm trees, sponges and rubble fibers. The data were analyzed by using correlation
and regression test. The result showed that the use of different filters were capable to
correlate positively on bacterial decomposition of ammonia and phosphate, therefore
the ammonia (P=0.024) and phosphate concentration (P=0.002) could be reduced
significantly. The best correlation between bacterial density and ammonia
concentration were found in rubble filter by 0.739. The rubble has extensive surface
and hollow-cavity for bacteria to stick on. The best correlation between bacterial
density and phosphate concentration was affained in palm trees filter by 0.881,
allegedly because of uneaten feed and feces accumulation in the bottom of filter,
resulting in anaerobic condition, allowing the bacteria decomposition of phosphate to
grow optimally.
Key words : Water quality, recirculatiom, density of bacteri, ammonia and phosphate.
PB  - FAKULTAS PERTANIAN 
TI  - KORELASI JENIS FILTER TERHADAP KEPADATAN BAKTERI
PEROMBAK AMONIAK DAN FOSFAT DALAM SISTEM
RESIRKULASI
AV  - restricted
ER  -