Download PDF by Unknown Author Unknown Author: Water Purification in the EEC. A State-Of-The-Art Review

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ISBN-10: 0080212255

ISBN-13: 9780080212258

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Extra info for Water Purification in the EEC. A State-Of-The-Art Review

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4. FILTRATION The m o s t c o m m o n t y p e s of f i l t e r s in u s e a r e r a p i d g r a v i t y and slow s a n d filters. H o w e v e r , o t h e r t y p e s do e x i s t s u c h a s p r e s s u r e s a n d f i l t e r s and diatomaceous earth filters. One w a t e r c o m p a n y i n t e n d s to i n s t a l l a n e w 43 d i a t o m a c e o u s e a r t h f i l t e r in t h e n e a r f u t u r e . Dual m e d i a filtration h a s been e x p e r i m e n t e d with by m o s t of the l a r g e w a t e r c o m p a n i e s a n d s o m e f i l t e r s of t h i s type a r e now in u s e .

In v i e w of the c u r r e n t c o n c e r n o v e r c h l o r i n a t e d o r g a n i c c o m p o u n d s t h e r e i s m u c h i n t e r e s t in the u s e of and the s e a r c h f o r a l t e r n a t i v e d i s i n f e c t a n t s . D a t a on the e f f e c t i v e n e s s of a l t e r n a t i v e d i s i n f e c t a n t s o b t a i n e d f r o m c o m p l e t e d l a b o r a t o r y s t u d i e s a n d f r o m o p e r a t i o n a l p l a n t should be r e v i e w e d . Further t e s t s m a y n e e d to be c a r r i e d out o n full s c a l e p l a n t .

The a d d i t i o n of h i g h c h l o r i n e d o s e s i s e x p e n s i v e , significantly i n c r e a s e s the c h l o r i d e l e v e l s and m a y p r e s e n t d i f f i c u l t i e s due to c h l o r i n a t e d organics. 33 It i s p o s s i b l e to r e m o v e a m m o n i a by a n u m b e r of d i f f e r e n t t e c h n i q u e s . R e c e n t e x p e r i e n c e h a s i n d i c a t e d t h a t b i o l o g i c a l o x i d a t i o n p r o c e s s e s h o l d the m o s t p r o m i s e and i t i s r e c o m m e n d e d t h a t r e s e a r c h and d e v e l o p m e n t be c o n t i n u e d to p r o d u c e i m p r o v e d p r o t o t y p e d e s i g n s .

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Water Purification in the EEC. A State-Of-The-Art Review by Unknown Author Unknown Author


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