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Energy Savings in Wastewater Treatment Systems: Economics and Control Strategies

Discover economic theories and solutions for optimizing electricity use in activated sludge wastewater treatment. Learn about potential savings, control mechanisms, and efficient strategies to reduce power consumption in treatment processes.

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Energy Savings in Wastewater Treatment Systems: Economics and Control Strategies

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  1. t u r b l e x a e r a t i o n s y s t e m c o n t r o l e c o n o m i c s t h e o r i e s s o l u t i o n s

  2. economics Electricity Requirements for Activated Sludge Wastewater Treatment

  3. Power is Money 25% Savings $43,750/yr economics $3500 / mgd / (cents/kW) / yr $3500 x 10 mgd x 5 (cents/kW) = $175,000/yr

  4. p 1 v1 t1 theories p 2 v2 t2

  5. p 1 v1 t1 Peak 8360 ACFM476 HP Potential Savings 254,040 HP / YR $13,270/yr @ $0.07/kW $265,414 / 20 YR Min 7840 ACFM447 HP t e m p e r a t u r e theories p 2 v2 t2

  6. Peak 456 HP p 1 v1 t1 Potential Savings 375,000 HP / YR $18,590 / YR @ $0.07/kW $371,800 / 20 yrs Min 382 HP v o l u m e theories p 2 v2 t2

  7. Peak 9.4 psi456 HP Potential Savings 162,000 HP hrs / YR $8,462 / yr @ 0.07/kW $ 169,254 / 20 YR Min 8.6 psi419 HP p r e s s u r e p 1 v1 t1 theories p 2 v2 t2

  8. solutions

  9. 90 80 15% 30% 70 i s e n t r o p i c e f f i c i e n c y - % 60 t u r n d o w n l i m i t 50 w w t p 100 90 80 70 60 50 40 % c a p a c i t y b l o w e r d e s i g n Control: Guide Vanes solutions s i n g l e – s t a g e Control: Inlet Valve VFD m u l t i – s t a g e Control: VFD p o s i t i v e d i s p t e m p e r a t u r e

  10. b l o w e r c o n t r o l b i o l o g y c o n t r o l sp 2 ppm sp 5000 cfm 4000 cfm cv pv 1.85 ppm cv Valve position pv pv 9.1 psig cv 9.2 psig Vane Position sp v o l u m e p r e s s u r e PID PID MOV Relational Control solutions PID

  11. solutions m a n u a l a e r a t i o n c o n t r o l

  12. solutions m i x e d m o d e a e r a t i o n c o n t r o l

  13. solutions s e m i – a u t o m a t i c a e r a t i o n c o n t r o l

  14. solutions f u l l y a u t o m a t i c a e r a t i o n c o n t r o l

  15. solutions

  16. o p e r a t i o n a l s t r a t e g y solutions p r e d i c t a b l e & c o n s i s t e n t t a n g i b l e b e n e f i t s f l e x i b i l i t y f a u l t t o l e r a n t

  17. t u r b l e x a e r a t i o n s y s t e m c o n t r o l

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