In the presented paper we discuss pure versions of pushdown automata that have no extra non-input symbols. More specifically, we study pure multi-pushdown automata, which have several pushdown lists. We restrict these automata by the total orders defined over their pushdowns or alphabets and determine the accepting power of the automata restricted in this way. Moreover, we explain the significance of the achieved results and relate them to some other results in the automata theory.
The use of membrane bioreactors (MBR) continues to increase across the world. In dry countries such as Australia, they become the foundation technology for reclaimed water production facilities. However, there is a perception that an MBR uses significantly more energy than a conventional continuous wastewater treatment facility and this is incompatible with greenhouse gas concerns especially in Australia where a carbon tax is potentially going to be legislated. This paper reports on the performance of MBRs commissioned in the Australian City of Cairns, North Queensland, with particular reference to the nutrient removal performance and the measured power consumption in comparison to conventional processes with clarification and tertiary filtration. The MBRs were designed in accordance with design procedures outlined in 2008 which support the principle of avoiding high recycle rates between the membrane tank and the aeration zone of the main process bioreactor as this raises the MLSS concentration increasing the power required for process aeration. The design procedure integrates the performance requirements for BNR and the physical requirements for membranes to enable the design to be optimised with respect to reactor size and power requirements.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.