Improved design strategies at BNR plants should include cost reductions so that the consumers and water authorities will be more willing to build EBPR plants instead of conventional activated sludge plants. Through efficient design, actual savings in construction and operation costs can be realized. For this reason, anaerobic stabilization of COD needs to be seriously considered during design for direct energy savings at the plants. The existence of anaerobic stabilization has been demonstrated through experimental work. Evaluation of operational data from existing plants has also indicated the definite presence of anaerobic stabilization at plants that include anaerobic zones for EBPR as part of their operation. By exploring the biochemical reactions taking place in EBPR process, particularly the involvement of the storage mechanisms for PHA, poly-P and glycogen storage, the potential mechanisms of the anaerobic stabilization of COD in EBPR systems was explored. The resultant balances pointed out the importance of glycogen metabolism in terms of conserving carbon and providing a sink for the reducing equivalents produced under aerobic conditions. This mechanism is different from those observed in anoxic-aerobic and conventional aerobic activated sludge systems, and appears to be at least partially responsible for the observed anaerobic stabilization of COD.
机构:
Key Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, ChinaKey Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, China
Chen, Guangxiu
Yuan, Linjiang
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Key Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, ChinaKey Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, China
Yuan, Linjiang
Han, Wei
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Key Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, ChinaKey Laboratory of Northwest Water Resources, Environment and Ecology, Xi'an University of Architecture and Technology, Xi'an 710055, China
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Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
Beijing Univ Technol, Key Lab Beijing Water Environm Recovery Engn, Beijing 100124, Peoples R ChinaUniv Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
Ye, Liu
Pijuan, Maite
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Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
Univ Girona, Catalan Inst Water Res ICRA, Girona 17003, SpainUniv Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
Pijuan, Maite
Yuan, Zhiguo
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Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, AustraliaUniv Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia