全过程除臭工艺在北京某再生水厂的应用及其中气液两相污染物的削减过程

全过程除臭是一种以微生物法为核心的低碳除臭方式。为评估其应用效果，分析了北京市某再生水厂的产排污关键环节中的气液两相污染物削减情况。结果表明：初始污水中[NH₄⁺-N]高于H₂S的质量浓度，分别为55 mg·L⁻¹和6 mg·L⁻¹，二者随污水反应进程呈逐渐降低的趋势，分别在生化段和粗格栅处去除效果最好；气相污染物主要为NH₃和H₂S，其中NH₃在粗格栅处排放通量较高，质量浓度为0.4 mg·m⁻³，化学浓度贡献率为71%~91%，H₂S在污泥储池处质量浓度较高，为0.16 mg·m⁻³；对粗格栅处进行模拟换气实验，H₂S、NH₃和臭气的浓度分别为 0.027~0.036 mg·m⁻³、0.023~0.031 mg·m⁻³和10~15；厂界的NH₃和H₂S质量浓度在上风向的检测值均低于下风向，最高值为0.100和 0.007 mg·m⁻³，臭气 (无量纲) ，甲烷体积分数为1.7×10⁻⁶，粗格栅模拟换气和厂界排放浓度均达到北京市《大气污染物综合排放标准》 (DB11/501-2017) 和《城镇污水处理厂污染物排放标准》 (GB18918-2002) 。该研究结果对北京某再生水厂进行气液两相污染物削减分析，证明了全过程除臭工艺应用的有效性，可为同类水厂的除臭问题提供参考。

Application of the whole process deodorization process in a reclaimed water plant in Beijing and the reduction of gas-liquid two-phase pollutants

Aiming at the demand for reducing pollution and carbon in the deodorization process of a reclaimed water plant, the whole process deodorization process was adopted, which was a relatively low carbon deodorization method based on microbial method. In order to evaluate its application effect, the reduction of liquid and gas phase pollutants in the key point of production and sewage of a reclaimed water plant in Beijing was analyzed in this study. The results showed that the concentration of NH4+-N in the initial sewage was higher than H2S, which was 55 mg·L−1 and 6 mg·L−1, respectively. The concentration of NH4+-N and H2S decreased gradually with the process of sewage reaction, and the removal effect was the best at the biochemical section and coarse grid. The main gaseous pollutants were NH3 and H2S, among which NH3 had the highest emission flux of 0.4 mg·m−3 at the coarse grid and the contribution rate of chemical concentration was 71%~91%, while H2S had the highest concentration of 0.16 mg·m−3 at the sludge storage tank. The simulated air exchange experiments were carried out at the coarse grille, and the concentrations of H2S, NH3 and odor were 0.027~0.036 mg·m−3, 0.023~0.031 mg·m−3 and 10~15, respectively. The concentration of NH3 and H2S in the factory boundary in the upwind direction was lower than that in the downwind direction, the highest values were 0.100 and 0.007 mg·m−3, odor (dimensionless), methane concentration was 1.7×10−6. The simulated ventilation of coarse grille and the emission concentration of plant boundary reached the comprehensive emission Standard of Air Pollutants of Beijing(DB11/501-2017) and Pollutant Emission Standard of Urban Sewage Treatment Plant (GB18918-2002). In this study, the gas-liquid two-phase pollutant reduction analysis of a Beijing recycled water plant proved the effectiveness of the whole process deodorization process, and provided a technical reference for the deodorization problem of similar water plants.