Table 12 Comparison of the EN-MBBR system with other studies.
Item | EN-MBBR (This study) | DEMON37 | SNAD38 | SHARON39 | Anammox40 | CANON41 |
|---|---|---|---|---|---|---|
Treatment source | All side streams (supernatant, underflow, and centrate) | Centrate | Centrate | Centrate | Centrate | Centrate |
Treated effluent discharge | Plant water fall | Plant water head | Plant water head | Plant water head | Plant water head | Plant water head |
Plant volumes | Very good for volumes reduction | Limited effect | Limited effect | Limited effect | Limited effect | Limited effect |
Sludge production | Good for sludge reduction | Weak | Weak | Weak | Weak | weak |
Biogas generated | Very good for biogas generated | No effect | No effect | No effect | No effect | No effect |
Nutrient removal | Excellent for N, P, and S | Good for TN | Good for TN | Good for NH4 | Good for TN | Good for TN |
Inert material removal | Excellent | No effect | No effect | No effect | No effect | No effect |
Power saving | Very good | Limited effect | Limited effect | Limited effect | Limited effect | Limited effect |
Denitrification | Very good for improving denitrification | Good | Good | Weak | Good | Good |
Plant costs | Very good for reducing the overall cost | Limited effect | Limited effect | Limited effect | Limited effect | Limited effect |
Area requirement | Small | Middle | Big | Big | Big | Small |
power consumption | Generating energy | Consume | Consume | Consume | Consume | Consume |
Oxygen requirement | 25% of the O2 amount is self-provided by from underflow sidestream | Few | Few | High | Middle | Few |
Odor removal | Very good for H2S removal | Weak | Weak | Good | Middle | Weak |
EN-MBBR operation | Very simple | Complex | Complex | Complex | Complex | Complex |
EN-MBBR Shock | Very good for shocks resist | Weak | Middle | Weak | Weak | Weak |
EN-MBBR construction cost | Few | Middle | High | High | High | Few |
Alkalinity consumption | No need | – | – | Need | Need | – |
EN-MBBR start-up | 3 weeks | 3–36 months | 3–36 months | 3–36 months | 3–36 months | 3–36 months |
Pollutants removal efficiency | 97% removal efficiency for COD, BOD, TSS, H2S, NH4, NO3, and TP | 70–90% removal efficiency of TN | 70–75% removal efficiency of TN | 70–90% removal efficiency of TN | 70–90% removal efficiency of TN | 70–90% removal efficiency of TN |
