Nutrient loading rate effects on nutrient removal in a five-step sequencing batch reactor

On-line control of the biological treatment process is an innovative tool to cope with variable concentrations of chemical oxygen demand and nutrients in industrial wastewater. In the present study we implemented a simple dynamic control strategy for nutrient-removal in a sequencing batch reactor (SBR) treating variable tank truck cleaning wastewater. The control system was based on derived signals from two low-cost and robust sensors that are very common in activated sludge plants, i.e. oxidation reduction potential (ORP) and dissolved oxygen. The amount of wastewater fed during anoxic filling phases, and the number of filling phases in the SBR cycle, were determined by the appearance of the ‘nitrate knee’ in the profile of the ORP. The phase length of the subsequent aerobic phases was controlled by the oxygen uptake rate measured online in the reactor. As a result, the sludge loading rate (F/M ratio), the volume exchange rate and the SBR cycle length adapted dynamically to the activity of the activated sludge and the actual characteristics of the wastewater, without affecting the final effluent quality.

Download Full-text

Nutrient Removal and Phosphorus Recovery from Municipal Sewage Using Anaerobic/Anoxic Sequencing Batch Reactor.

Journal of Japan Society of Civil Engineers Ser G (Environmental Research) ◽

10.2208/jscejer.69.iii_121 ◽

2013 ◽

Vol 69 (7) ◽

pp. III_121-III_127

Author(s):

Kenichi SAKAMOTO ◽

Masashi HATAMOTO ◽

Masanobu TAKAHASHI ◽

Kengo KUBOTA ◽

Nobuo ARAKI ◽

...

Keyword(s):

Nutrient Removal ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Phosphorus Recovery ◽

Municipal Sewage

Download Full-text

Optimization of biological nutrient removal from synthetic waste water using BOD biosensor in Sequencing Batch Reactor system

Sustainable Energy and Environmental Technologies ◽

10.1142/9789812791924_0027 ◽

2000 ◽

Author(s):

JD Jang ◽

JP Barford ◽

R Renneberg

Keyword(s):

Waste Water ◽

Nutrient Removal ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Reactor System ◽

Biological Nutrient Removal

Download Full-text

Cellulosic waste degradation by rumen-enhanced anaerobic digestion

Water Science & Technology ◽

10.2166/wst.2003.0243 ◽

2003 ◽

Vol 48 (4) ◽

pp. 155-162 ◽

Cited By ~ 22

Author(s):

S.P. Barnes ◽

J. Keller

Keyword(s):

Anaerobic Digestion ◽

Sequencing Batch Reactor ◽

Loading Rate ◽

Cellulose Degradation ◽

Batch Reactor ◽

Lignocellulosic Material ◽

Anaerobic Sequencing Batch Reactor ◽

Microbial Ecosystems ◽

Cellulosic Waste ◽

Waste Degradation

Anaerobic digestion of lignocellulosic material is carried out effectively in many natural microbial ecosystems including the rumen. A rumen-enhanced anaerobic sequencing batch reactor was used to investigate cellulose degradation to give analysis of overall process stoichiometry and rates of hydrolysis. The reactor achieved VFA production rates of 207-236 mg COD/L/h at a loading rate of 10 g/L/d. Overloading of the reactor resulted in elevated production of propionic acid, and on occasion, the presence of succinic acid. With improvements in mixing and solids wasting, the anaerobic sequencing batch reactor system could enable full-scale application of the process for treatment of cellulosic waste material.

Download Full-text