Biological Phosphate Removal from Wastewaters. Proceedings by R. Ramadori

By R. Ramadori

Environmental difficulties attributable to the build-up of phosphates in waters, and by means of the disposal of huge volumes of sludges from physical-chemical strategies, have elevated the curiosity in phosphorus removing from wastewaters using complex organic methods that use very little chemical ingredients. themes mentioned diversity from the elemental microbiology and biochemistry of the improved organic elimination of phosphate, to functional full-scale plant reviews with phosphorus elimination and sludge dealing with from such strategies

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T o t a l o r g a n i c c a r b o n (TOC) w a s m e a s u r e d by a T O C analyzer (Shimadzu, TOC-500). Volatile acids including acetic acid were m e a s u r e d by g a s c h r o m a t o g r a p h y . T h e a n t h r o n e m e t h o d w a s u s e d f o r b o t h t h e supernatant g l u c o s e d e t e r m i n a t i o n and the m e a s u r e m e n t of t o t a l c a r b o h y d r a t e . C a r b o h y d r a t e m e a s u r e d by the a n t h r o n e m e t h o d i n c l u d e s i n t r a c e l l u l a r g l y c o g e n .

Acetate and propionate appeared to be the most "readily storable" simple carbon substrates in the biomass studied which was seeded with primary sludge fermenter liquor. Aerobic phosphate uptake was associated with PHA consumption. Nitrate, but not nitrite, could replace oxygen for phosphate uptake and PHA consumption. A classification of microbial activities in a dephosphating biomass is presented. 41 D y n a m i c s of carbon reserves MATERIALS AND METHODS Materials Biomass characteristics. The pilot plant treats mainly domestic wastewater pumped daily into two stirred storage tanks located on site.

1 9 8 6 ) . R e l a t i o n s h i p b e t w e e n s l u d g e p r o d u c t i o n a n d p h o s p h o r u s c o n t e n t of s l u d g e in t h e a n a e r o b i c a e r o b i c p r o c e s s (in J a p a n e s e ) . Proc. of 23rd Conf. , 23, 3 6 4 - 3 6 6 . M a t s u o , Y. a n d M i y a , A. ( 1 9 8 7 ) . A n a e r o b i c u p t a k e of o r g a n i c s by t h e a c t i v a t e d s l u d g e g r o w n w i t h a n a e r o b i c a e r o b i c sequence- (in J a p a n e s e ) . P r o c . of E n v i r o n .

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