中英文对照翻译－UASB厌氧处理工艺的现状与发展环境工程给排水专业中英文.doc

The status quo and development of UASB anaerobic process Abstract: This paper introduces the origin of UASB reactor, the working principles, characteristics, the development and application of the latest research progress, pointing out that the recent UASB reactor research focus. Key words: UASB; anaerobic treatment process;  1. Introduction :???? Anaerobic biological treatment as the use of anaerobic metabolism of microorganisms, without the provision of energy sources under the conditions of organic matter as to be restored by hydrogen donor, while generating energy value of the methane gas. Anaerobic biological treatment applies not only to high concentrations of organic wastewater, influent BOD up to the highest concentration of tens of thousands of mg / l, can also be applied in low concentrations of organic wastewater, such as sewage, and other cities. ???? Anaerobic biological treatment process and low consumption, organic volume load, generally 5-10 kgCOD/m3.d, up to a maximum of 30-50 kgCOD/m3.d; less residual sludge; on the nutritional needs of low anaerobes, MDR-toxic, biodegradable organic molecular weight high impact resistant capacity of strong output of methane is a kind of clean energy. ???? In the whole of society to promote a recycling economy and the implementation of the concerns of the industrial waste recycling today, anaerobic biological treatment of sewage is clearly enables the optimization of resources. In recent years, the anaerobic wastewater treatment process developed very rapidly, with new technology, new methods emerging, including anaerobic contact method, the up-flow anaerobic sludge bed anaerobic stall plate, anaerobic biological filter , anaerobic expanded bed and fluidized bed, and the third generation of anaerobic process EGSB and IC anaerobic reactor, developed very rapidly. ???? And the up-flow anaerobic sludge blanket UASB (Up-flow Anaerobic Sludge Bed, Note: hereinafter referred to UASB) owing to the anaerobic proce