Peranan "Water Conditioning System" terhadap Perubahan Konsentrasi Deterjen dalam Air dari Saluran Irigasi di Kolam Percobaan Perikanan Darmaga-Bogor

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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 BOGOR

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RINGKASAN

YULIANTI. P e r a n a n " W a t e r C o n d i t i o n i n g S y s t e m " T e r h a d a p

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 D a l a m A i r D a r i S a l u r a n

I r i g a s i d i K o l a m 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 b a w a h b i m b i n g a n MUHAMMAD EIDMAN, s e b a g a i k e t u a

,

F I F I W I D J A J A d a n DIETRIECH GEOFFREY BENGEN s e b a g a i

a n g g o t a )

.

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 " W a t e r C o n d i t i o n i n g

S y s t e m (WCS)" d i k o l a m - k o l a m 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 a r i b u l a n J a n u a r i s a m p a i M e i 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 2 0 m ,

l e b a r 1 0 m d a n k e d a l a m a n 1 . 5 m . K o l a m WCS i n i d i b a g i

l a g i m e n j a d i t i g a b u a h k o l a m y a n g l e b i h k e c i l . K o l a m

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 . 4 5 m . K o l a m k e d u a b e r t u r u t - t u r u t d a r i b a w a h 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 , 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 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 . S e d a n g k a n k o l a m k e t i g a d i i s i d e n g a n a r a n g s e t i n g g i 0 . 6 0 m .

T u j u a n p e n e l i t i a n i n i i a l a h u n t u k 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 a l a m a i r s a l u r a n i r i g a s i y a n g m e n j a d i s u m b e r

a i r b a g i k o l a m - k o l a m p e r c o b a a n p e r i k a n a n d i D a r m a g a - B o g o r .

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 m e n g g u n a k a n m e t o d e

B i r u M e t i l e n . P e n g a m b i l a n c o n t o h a i r d i l a b u k a n d i k o l a m

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s i a n g d a n s o r e h a r i s e l a m a l i m a h a r i b e r t u r u t - t u r u t d a l a m

s a t u b u l a n s e l a m a l i m a b u l a n p e n e l i t i a n . U n t u k 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 m e n g g u n a k a n

R a n c a w a n K e l o m p o k A c a k 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 s a m p a i b a t a s y a n g 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 -

m a t a n d a n a n t a r b u l a n b e r b e d a . E f e k t i v i t a s t e r t i n g g i d i -

p e r o l e h p a d a w a k t u s i a n g h a r i d a n t e r e n d a h p a d a w a k t u p a g i

h a r i . E f e k t i v i t a s t e r e n d a h p a d a w a k t u p a g i h a r i t e r j a d i

p a d a b u l a n J a n u a r i ( 2 4 . 3 % ) d a n t e r t i n g g i p a d a b u l a n

A p r i l ( 6 3 . 0 % ) . U n t u k s i a n g h a r i , e f e k t i v i t a s t e r e n d a h

t e r j a d i p a d a b u l a n J a n u a r i ( 5 5 . 9 % ) d a n t e r t i n g g i p a d a

b u l a n F e b r u a r i ( 7 2 . 7 % ) . S e d a n g k a n p a d a s o r e h a r i , e f e k -

t i v i t a s t e r e n d a h t e r j a d i p a d a b u l a n J a n u a r i ( 4 4 . 7

X )

d a n

t e r t i n g g i p a d a b u l a n A p r i l ( 6 5 . 4 % ) .

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 r e n d a h n y a k o n s e n t r a s i d e t e r j e n d a n l a j u p e n g a l i r a n

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. B a t u 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 d a l a m m e n u r u n k a n 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 b e r p e n g a r u h t e r h a d a p k o n s e n t r a s i d e t e r j e n ,

W C S

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

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h u b u n g a n d e n g a n 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 -

t a s t o t a l , k e s a d a h a n t o t a l d a n pH. T e r n y a t a B C S h a n y a

b e r p e n g a r u h k e c i l t e r h a d a p k e e m p a t p a r a m e t e r k u a l i t a s a i r

t e r s e b u t , s e h i n g g a n i l a i - n i l a i p a r a m e t e r t e r s e b u t m a s i h

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ABSTRACT

YULIANTI. T h e 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 F r o m I r r i g a t i o n

C a n a l a t D a r m a g a 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 w a s 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 , w h i c h b e g a n i n J a n u a r y

a n d e n d e d i n May 1 9 8 5 . T h e WCS p o n d ' s d i m e n s i o n i s 2 0 m

l o n g , 1 0 m w i d e a n d 1 . 5 m d e e p , a n d i s d i v i d e d i n t o t h r e e

s m a l l p o n d s . T h e f i r s t p o n d i s f i l l e d w i t h 1 . 4 5 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 o f p a r t i c l e s

+

2 cm. T h e s e c o n d

p o n d i s f i l l e d w i t h : 0 . 5 5 m t h i c k o f l i m e s t o n e s w i t h

d i a m e t e r o f p a r t i c l e s

+

5 c m , 0 . 3 0 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 o f p a r t i c l e s

+

2 cm a n d 0 . 4 0 m t h i c k o f

s a n d w i t h d i a m e t e r o f p a r t i c l e s

+

2 _mm. _{T h e t h i r d p o n d}

i s f i l l e d w i t h 0 . 6 0 m t h i c k o f c h a r c o a l .

T h i s s t u d y i s a n e f f o r t t o r e d u c e t h e 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 f r o m i r r i g a t i o n c a n a l a t D a r m a g a -

B o g o r b y m e a n s o f WCS.

T h e M e t h y l e n e B l u e M e t h o d 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 o f d e t e r g e n t . S a m p l e s o f 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 m o r n i n g , a t n o o n a n d 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 o n e m o n t h ; a n d f i v e m o n t h s i s n e e d e d

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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

i s taken place.

The maximum effectiveness is observed

to be at noon while the minimum effectiveness is to be

i n the morning.

The minimum effectiveness for morning

observation occured i n January (24.3

% )

and the maximum

effectiveness in April (63.0

% ) .

The minimum effectiveness

for noon observation occured in January (55.9

% )

and the

maximum i n February

(72.7

% ) .

While for afternoon

observation the minimum occured in January (44.7

% )

and

the maximum i n April (65.4

% ) .

The WCS degree of effectiveness is influenced by

the content of detergent and the velocity of water

entering the inlet pond.

T h e 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

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i n f l u e n c e o f W C S t o w a r 3 t h e s e f o u r p a r a m e t e r s e x i s t , t h e

v a l u e i s s t i l l b e l o w t h e t o l e r a b l e l i m i t f o r f i s h e r y

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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 BOGOR

(126)