i
PERANAN " WATER CONDITIONING SYSTEM " TERHADAP PERUBAHAN KONSENTRASI DALAM AIR DARl SALURAN IRI Dl KOLAM PERGOBAAN PERIKANAN D
KARYA
ILMIAH
Oleh : YULIANTI C. 18 0510
FAKULTAS
PERIKANAN
INSTITUT PERTANIAN 1986
BOGOR
RINGKASAN
YULIANTI.
P e r a n a n "Water
C o n d i t i o n i n g System" Terhadap
P e r u b a h a n K o n s e n t r a s i D e t e r j e n Dalam A i r D a r i S a l u r a n I r i g a s i d i Kolam P e r c o b a a n P e r i k a n a n D a r m a g a - B o g o r ( D i bawah b i m b i n g a n MUHAMMAD EIDMAN,
sebagai ketua ,
F I F I W I D J A J A d a n DIETRIECH GEOFFREY BENGEN s e b a g a i anggota)
.
P e n e l i t i a n i n i d i l a k u k a n d a l a m "Water S y s t e m (WCS)" d i k o l a m - k o l a m
Conditioning
p e r c o b a a n p e r i k a n a n Darmaga,
B o g o r d a r i b u l a n J a n u a r i s a m p a i Mei 1 9 8 5 .
WCS y a n g d i -
t e l i t i m e r u p a k a n s u a t u k o l a m y a n g b e r u k u r a n p a n j a n g 20 m , lebar
10 m d a n k e d a l a m a n 1 . 5 m .
Kolam WCS i n i d i b a g i
l a g i menjadi t i g a buah kolam yang l e b i h k e c i l .
Kolam
p e r t a m a d i i s i b a t u k a p u r b e r d i a m e t e r t 2 cm s e t i n g g i 1.45 m.
Kolam k e d u a b e r t u r u t - t u r u t
d a r i bawah k e a t a s
d i i s i b a t u k a p u r b e r d i a m e t e r t 5 cm s e t i n g g i 0 . 5 5 m ,
batu
k a p u r b e r d i a m e t e r t 2 cm s e t i n g g i 0 . 3 0 m d a n p a s i r b e r d i a m e t e r 2 2 mm s e t i n g g i 0 . 4 0
m.
d i i s i dengan arang s e t i n g g i 0.60
Sedangkan kolam k e t i g a
m.
Tujuan p e n e l i t i a n i n i i a l a h untuk mengetahui sampai s e j a u h mana p e r a n a n WCS t e r h a d a p p e n u r u n a n k o n s e n t r a s i d e t e r j e n dalam a i r s a l u r a n i r i g a s i yang m e n j a d i sumber a i r b a g i kolam-kolam
p e r c o b a a n p e r i k a n a n d i Darmaga-Bogor.
K o n s e n t r a s i d e t e r j e n d i u k u r d e n g a n menggunakan metode Biru Metilen.
Pengambilan c o n t o h a i r d i l a b u k a n d i kolam
p e m a s u k a n d a n k o l a m k o n t r o l k e t i g a WCS s e t i a p p a g i ,
s i a n g dan s o r e h a r i selama lima h a r i b e r t u r u t - t u r u t s a t u bulan selama lima bulan p e n e l i t i a n .
dalam
Untuk m e n g e t a h u i
s a m p a i s e j a u h mana p e r a n a n WCS t e r h a d a p p e n u r u n a n k o n s e n t r a s i d e t e r j e n d i l a k u k a n p e r h i t u n g a n d e n g a n menggunakan R a n c a w a n Kelompok Acak t e n g k a p d e n g a n s u b s a m p l i n g . K e m u d i a n d i l a k u k a n u j i Beda N y a t a J u j u r . WCS t e r n y a t a e f e k t i f d a l a m p e n u r u n a n k o n s e n t r a s i d e t e r j e n sampai b a t a s yang l a y a k b a g i k e g i a t a n p e r i k a n a n . E f e k t i v i t a s p e n u r u n a n d e t e r j e n o l e h WCS a n t a r w a k t u p e n g a matan dan a n t a r b u l a n berbeda.
Efektivitas tertinggi di-
p e r o l e h pada waktu s i a n g h a r i dan t e r e n d a h pada waktu p a g i hari.
E f e k t i v i t a s terendah pada waktu p a g i h a r i t e r j a d i
pada bulan J a n u a r i (24.3 April (63.0
%).
%)
dan t e r t i n g g i pada bulan
Untuk s i a n g h a r i ,
t e r j a d i pada b u l a n J a n u a r i (55.9 bulan Februari (72.7
%).
%)
e f e k t i v i t a s terendah dan t e r t i n g g i pada
Sedangkan pada s o r e h a r i ,
t i v i t a s terendah t e r j a d i pada bulan J a n u a r i t e r t i n g g i pada bulan A p r i l
(65.4
(44.7
efek-
X) dan
%).
B e s a r k e c i l n y a e f e k t i v i t a s WCS i n i d i p e n g a r u h i o l e h t i n g g i rendahnya k o n s e n t r a s i d e t e r j e n dan l a j u pengaliran a i r y a n g m a s u k k e d a l a m k o l a m p e m a s u k a n WCS.
Batu k a p u r
y a n g t e r d a p a t d a l a m t a h a p p e r t a m a d a n k e d u a WCS p a l i n g e f e k t i f dalam menurunkan k o n s e n t r a s i d e t e r j e n . S e l a i n berpengaruh terhadap konsentrasi d e t e r j e n ,
WCS j u g a d i d u g a b e r p e n g a r u h t e r h a d a p p a r a m e t e r k u a l i t a s a i r lainnya.
P a r a m e t e r k u a l i t a s a i r y a n g mempunyai
hubungan dengan d e t e r j e n i a l a h o k s i g e n t e r l a r u t , a l k a l i n i tas total,
k e s a d a h a n t o t a l d a n pH.
Ternyata BCS hanya
b e r p e n g a r u h k e c i l t e r h a d a p keempat p a r a m e t e r k u a l i t a s a i r tersebut,
sehingga n i l a i - n i l a i
parameter t e r s e b u t masih
berada pada b a t a s yang l a y a k b a g i k e g i a t a n perikanan.
ABSTRACT YULIANTI.
The E f f e c t o f W a t e r C o n d i t i o n i n g S y s t e m i n
A l t e r i n g D e t e r g e n t ' s C o n c e n t r a t i o n i n W a t e r From I r r i g a t i o n C a n a l a t Darmaga R e s e a r c h P o n d s ( U n d e r t h e g u i d a n c e o f MUHAMMAD EIDMAN, F I F I W I D J A J A a n d DIETRIECH GEOFFREY
BENGEN)
.
T h i s r e s e a r c h was c o n d u c t e d a t t h e W a t e r C o n d i t i o n i n g S y s t e m (WCS) p o n d i n D a r m a g a - B o g o r , a n d e n d e d i n May 1 9 8 5 . long,
T h e WCS p o n d ' s
10 m wide and 1.5 m d e e p ,
s m a l l ponds.
which began i n J a n u a r y d i m e n s i o n i s 20 m
and i s d i v i d e d i n t o t h r e e
The f i r s t pond i s f i l l e d w i t h 1.45 m t h i c k o f
l i m e s t o n e w i t h d i a m e t e r of p a r t i c l e s pond i s f i l l e d w i t h : 0.55 diameter of p a r t i c l e s
+
2 cm.
The second
m t h i c k of limestones with
5 cm,
w i t h diameter of p a r t i c l e s
+
+
0.30
m t h i c k of l i m e s t o n e
2 cm a n d 0 . 4 0 m t h i c k o f
sand w i t h diameter of p a r t i c l e s
+
2 mm.
The t h i r d pond
i s f i l l e d w i t h 0.60 m t h i c k o f c h a r c o a l . This study is an e f f o r t t o reduce the detergent's c o n c e n t r a t i o n i n w a t e r f r o m i r r i g a t i o n c a n a l a t DarmagaB o g o r b y m e a n s o f WCS. The M e t h y l e n e B l u e Method i s p e r f o r m e d t o m e a s u r e t h e c o n c e n t r a t i o n of d e t e r g e n t .
Samples of w a t e r i s
t a k e n d a i l y f r o m t h e i n l e t a n d t h e o u t l e t o f t h e WCS p o n d . i n t h e morning,
a t noon and i n t h e a f t e r n o o n d u r i n g f i v e
r e s p e c t i v e d a y s i n one month; t o complete t h e sampling.
and f i v e months i s needed
T h e e f f e c t o f WCS t o w a r d s
detergent's concentration is determined from Randomized Complete Block Design with subsampling, which followed by the Honestly Significance Difference test afterward. From this study, the WCS is proofed to be effective in lowering detergent's concentration to a certain level, which is still tolerable for fishery activities, and the decrease differed with the time of observation (morning, noon or afternoon) and the months of which this observation is taken place.
The maximum effectiveness is observed
to be at noon while the minimum effectiveness is to be in the morning.
The minimum effectiveness for morning
observation occured in January (24.3 % ) effectiveness in April (63.0 % ) .
and the maximum
The minimum effectiveness
for noon observation occured in January (55.9 % ) maximum i n February (72.7 % ) .
and the
While for afternoon
observation the minimum occured in January (44.7 % ) and the maximum in April (65.4 % ) . The WCS degree of effectiveness is influenced by the content of detergent and the velocity of water entering the inlet pond.
The limestone in the first and
second pond proofed to be the most effective in lowering the detergent's
concentration.
The WCS is not only lowering the concentration of detergent but also influencing the other water quality parameters
such as the dissolved oxygen, the total
alkalinity, total hardness and the pH.
Although the
influence o f W C S towar3 these f o u r parameters exist, value is still below the tolerable limit for fishery activities.
the
