UV_photocatalytic oxidation is a novel pretreatment technique for environmental water analysis, but this technique has been seldom used in domestic environmental monitoring field.

紫外光催化氧化是近年来环境水质分析中采用的一种样品预处理新技术，目前在国内环境监测领域还应用得不多。

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From economical and environmental points of view, the development of a new oxidation system, which overcomes these disadvantages for the production of terephthalic acid, is desired.

从经济和环境的角度来看，都需要开发一种新的氧化体系来克服对苯二甲酸生产工艺的缺点。

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According to natural environmental conditions, two stage anaerobic-contacting oxidation process is adopted, which optimizes traditional urban biogas technology, and it may run with no energy.

本文采用二级厌氧-接触氧化工艺，依据自然地形条件，优化传统的城镇沼气工艺，无能耗处理污水。

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