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Among the industries fundamental for modern life, wastewater treatment receives increasing interest for its potential to recuperate valuable resources. The biogas obtained through anaerobic digestion, more specifically, the methane it contains, often represents a powerful asset in operating a WWTP (wastewater treatment plant) economically. However, the microbiological processes that lead to obtaining...
In this paper, water environment influence is simulated effectively from Beilun fifth stage engineering construction based on precise flow field of Beilun harbor. owing to piled wharf structure, engineering construction on non-pollution ecology hydrodynamic environment influence is small, only engineering local has certain influence; During the influence of suspended solids is primary, and affect...
As the complexity of the process of MBR industrial wastewater treatment, most of its parameters are nonlinear and uncertain characteristics, but they can be a regression model under certain conditions. With the engineering data from a MBR wastewater treatment plant in Shijiazhuang City for three months, we combine three of the indicators in its process, COD, TN, and TP, then get the regression model...
With researches and analyses of the impact of hydrodynamic conditions on eutrophication, a kind of photovoltaic powered water purification device has been invented. Photovoltaic powered water purification device improves the anaerobic conditions of the bottom of eutrophic water body by increasing oxygen content, and decomposing and digestive function of aerobic micro-organisms, resulting in reduction...
A simplified activated sludge model (SASM) was proposed, which based on the activated sludge model No.1 (ASM1). This model describes the carbon oxidation process, nitration process and denitration process. The amount of components and processes of the SASM is fewer than that of the ASM1, so the practicability of the SASM is enhanced. Using the SASM to simulate the DMBR by Biowin, the results showed...
This paper focuses on piecewise linear growth model of water quality about the river. The experiment was performed on South Sewage Discharge River of a certain Coastal City, in China. Physical, chemical parameters such as water temperature (T), turbidity (Tur) were measured over a one-year period including dry period, level period (May), wet period, level period (Oct.). Based on multilevel models,...
Caofeidian sea area is an important ecoregion of Hebei province. It's meaningful to investigate the pollution situation of this area. Firstly, a numerical model of tidal flow and pollutant transport based on Delft3D-FLOW is established to simulate and analyze COD distribution in Caofeidian sea area. Then, the model is verified by measured data. Finally, the flow field and COD concentration in this...
Membrane bioreactor (MBR) is a new water treatment technology which combines the membrane separation technology with bio-processing unit. It has been one of the hot topics in the international research and has been widely used in various industrial, municipal wastewater treatments. This paper takes one of the key factors affecting MBR - the relationship between sludge MLSS concentration and COD water...
Most of wastewater effluent parameters are difficult to measure online. Many soft-sensing methods have been used to predict them, such as the mechanistic approaches and artificial neural networks. In this paper, improved least squares support vector machines for regression (LS-SVR) is proposed. Benchmark Simulation Model No.1 (BSM1) is used to generate input-output data, then effluent parameters,...
There are lots of lakes with shallow depth and slow water velocity all over the China. The aquatic environments of these lakes become more and more worse because of the development of urbanization. In order to predict the lake eutrophication, it is necessary to know the pollutants distribution. On the foundation of the 2-D hydrodynamic model, the model on COD(Chemical oxygen demand) and TP (Total...
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