Nutrient Removal Evaluation Using the ASM2d Model
Journal Title: Current Journal of Applied Science and Technology - Year 2017, Vol 24, Issue 3
Abstract
Models can play an important role in the evaluation of upgrading strategies for biological nutrient removal. In this paper the calibration of ASM2d to a pilot plant with an intermittent aerobic/anoxic reactor is discussed. The performed modeling study was part of a retrofit study. An existing plant, removing only COD and where phosphorus was chemical precipitated, had to be upgraded towards full biological nutrient removal. Emphasis was put on the practical aspects of calibrating ASM no 2d efficiently. The calibration procedure was based on an 'expert approach' rather than on a system engineering approach. With only changing three parameters (reduction factors, analysis rates for PAOs and the decay rate for autotrophs), the model proved well capable of describing the performance of the pilot plant. A second set of parameter adjustments was tested. Good results were obtained as well, but more parameters had to be changed. New findings are that oxygen entering the treatment plant via the influent has an important influence on the simulated phosphate effluent concentrations. Further, reactions occurring in the final clarifier effect the effluent concentrations. This is indicated by the necessity to introduce and assign a virtual volume to the settler where reaction can occur. Both factors are extremely important to focus attention to because they are different between a pilot plant and a full scale system.
Authors and Affiliations
Aamr Alalewi, Shouwen Chen
Keywords
Related Articles
- EP ID EP319024
- DOI 10.9734/CJAST/2017/36138
- Views 83
- Downloads 0
Factors of Influence in the Results of 3D Measurements: Software Associated with Coordinate Measuring Machines
In three-dimensional metrology, the means of 3D measurements have been widely multiplied in recent years, in metrology laboratories, in production workshops, with the evolution of technology in general, the software asso...
Biofortified Cereal Crops: A Sustainable Approach for Food and Nutritional Security
Introduction: A stealthier form of deficiency is known as hidden hunger which is caused due to the intake of cheap food and having the characteristic of fulfilness but actually lacked in essential vitamins and minerals....
Influence of Land Tenure on Food Security Status among Smallholder Farmers in Kilifi South Sub-County, Kenya
Food security is critical to the economic, social, religious, political and cultural development Worldwide. It plays a great role in economic growth, poverty reduction and sustainable development in Kenya. A study was ca...
Evaluation of Microbial Pathogens in Biofilms of Deteriorating Fish in Ogun State, South-Western Nigeria
The experiment was carried out to identify bacteria pathogens that causes fish spoilage and consequently reduces their shelf-life in the environment and invariably found out basis for controlling and preventing their act...
Geospatial Modeling and Prediction of Land Use/Cover Dynamics in Onitsha Metropolis, Nigeria: A Sub-pixel Approach
Based on a sub-pixel approach, this study analysed the Land Use/Cover (LU/C) dynamics of Onitsha Metropolis in Anambra State, Nigeria. Landsat TM/ETM+ satellite imageries of 1986, 2001 and 2016 were characterized into di...