Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, 35390 Giessen, Germany.
Department R&D, DECKMA Hamburg GmbH, 22525 Hamburg, Germany.
Sensors (Basel). 2020 Feb 20;20(4):1161. doi: 10.3390/s20041161.
The oil and gas industry generates a large volume of contaminated water (produced water) which must be processed to recover oil before discharge. Here, we evaluated the performance and fouling behavior of commercial ceramic silicon carbide membranes in the treatment of oily wastewaters. In this context, microfiltration and ultrafiltration ceramic membranes were used for the separation of oil during the treatment of tank dewatering produced water and oily model solutions, respectively. We also tested a new online oil-in-water sensor (OMD-32) based on the principle of light scattering for the continuous measurement of oil concentrations in order to optimize the main filtration process parameters that determine membrane performance: the transmembrane pressure and cross-flow velocity. Using the OMD-32 sensor, the oil content of the feed, concentrate and permeate streams was measured continuously and fell within the range 0.0-200 parts per million (ppm) with a resolution of 1.0 ppm. The ceramic membranes achieved an oil-recovery efficiency of up to 98% with less than 1.0 ppm residual oil in the permeate stream, meeting environmental regulations for discharge in most areas.
石油和天然气行业会产生大量的受污染水（产出水），在排放之前必须对其进行处理以回收石油。在这里，我们评估了商业陶瓷碳化硅膜在处理含油废水中的性能和结垢行为。在这种情况下，微滤和超滤陶瓷膜分别用于处理罐脱水产出水和含油模型溶液中的油分离。我们还测试了一种基于光散射原理的新型在线水中油传感器（OMD-32），用于连续测量油浓度，以优化决定膜性能的主要过滤过程参数：跨膜压力和错流速度。使用 OMD-32 传感器，连续测量进料、浓缩液和渗透液流中的含油量，范围为 0.0-200 百万分率（ppm），分辨率为 1.0 ppm。陶瓷膜的油回收率高达 98%，渗透液中残留油不到 1.0 ppm，符合大多数地区的排放环境法规。
