What is the UCT process?
The UCT process was designed to minimize the effect of nitrate to the anaerobic contact zone, which is crucial for maintaining truly anaerobic conditions and thus, allowing biological phosphorus release (Ekama and Wentzel, 1999, Metcalf and Eddy, 2003, Vaiopoulou et al., 2007a).
What is MLE process?
The MLE process is a modification from a conventional activated sludge system, with the addition of an anoxic zone upstream of the aerobic zone. Nitrates converted from ammonia in the aerobic zone (nitrification) become the oxygen source, or food, for bacteria in the anoxic zone (denitrification).
What is modified Ludzack Ettinger?
The modified Ludzack-Ettinger process is designed to use nitrate produced in the aeration zone as a source of oxygen for facultative bacteria in the event of the breakdown of raw wastewater in the anoxic pan.
How is nitrogen and phosphorus removed from wastewater?
In the present study, we demonstrated that nitrogen and phosphorus were removed from the effluent of a sewage treatment plant using an anoxic bioreactor packed with wood and iron.
What is the BOD in water?
You don’t often think that water bodies contain oxygen, but water does contain a small amount of dissolved oxygen. A small amount, but it is essential for life in the water. Biological oxygen demand (BOD) generally represents how much oxygen is needed to break down organic matter in water.
What are the 5 stages of BARDENPHO?
The five-stage Bardenpho process detailed (WAS = waste-activated sludge; RAS = return-activated sludge). The five zones — anaerobic, anoxic, aerobic, anoxic, and aerobic — each require dedicated tank space, which is the critical component and cost of the Bardenpho process.
What is the BARDENPHO Process?
The modified, five-stage Bardenpho process is an expansion of the classic four-stage approach, with an anaerobic tank added on the front. The technical aspects of Bardenpho can be found in the U.S. EPA’s Municipal Nutrient Removal Technologies Reference Document, which includes the following diagram.
What is BARDENPHO wastewater treatment?
The Bardenpho Process of Wastewater Treatment was developed by James Barnard of South Africa in the 1970’s. It is a biological nutrient removal process which goes through four stages.
Is the BARDENPHO Process the best way to recover retained value?
Over the long term, when you have a retained-value asset like BNR, you have a much better opportunity to recover your costs.” The modified, five-stage Bardenpho process is an expansion of the classic four-stage approach, with an anaerobic tank added on the front.