Основні технологічні параметри реалізації аеробного біокомпостування осадів стічних вод
| Autor: | I. Yu. Popadiuk, O. V. Verbovskiy, Volodymyr Zhuk, Ivan Matlai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
аеробне біокомпостування
осади стічних вод активна зона зона охолодження відносний ефективний об'єм оптимізаційна задача Compost Environmental engineering engineering.material Slope coefficient Eu countries Dewatering engineering General Earth and Planetary Sciences Environmental science lcsh:SD1-669.5 Sewage treatment lcsh:Forestry Effective volume Sludge General Environmental Science Heap (data structure) |
| Zdroj: | Науковий вісник НЛТУ України, Vol 28, Iss 11, Pp 91-95 (2018) |
| ISSN: | 2519-2477 1994-7836 |
| Popis: | The main method of sewage sludge dewatering and stabilization at Ukrainian wastewater treatment plants (WWTP) still remains their disposal on the sludge sites. Large volumes of sewage sludge generated and accumulated over the decades on Ukrainian WWTP is a serious threat to the environment. The storage of the sewage sludge is forbidden in the EU countries beginning 2016 and the sludge sites can no longer be used for sewage sludge processing. A promising way to utilize sewage sludge at WWTP is the aerobic biocomposting with the production of organic-mineral mixture. The paper presents a generalized mathematical model concerning the geometrical dimensions of the compost heaps and the thickness of the cooling zone, and allowing us to predict and optimize the main technological parameters of the implementation of the process of aerobic composting of sewage sludge. It is shown that without any technical limitations, the maximum achievable relative effective volume increases with an increase in the height of the heap H, the slope coefficient m and the relative length of the heap L/H. For very long heaps (with L/H³20) the influence of the end zones on the value of the relative effective volume can be neglected. With a constant value of the cross-sectional area of long heaps, the maximum values of the relative effective volume correspond to the slope coefficient m = 1. The developed model enables solving optimization problems for a fixed volume of a compost heap when there are strong technical limitations regarding the maximum value of height H. In a practically significant range of values of input parameters (Wtot = 50−500 m3; Hmax = 2 m; a = 0.3−0.5 m) the maximum relative effective volume corresponds to heaps of small length with values of the slope coefficient m > 1. This is explained by the fact that such heaps have a minimum free surface with air, thereby minimizing the volume of cooling zones at a constant volume and height of the shoulder. |
| Databáze: | OpenAIRE |
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