A comparison of oil and grease removal from automobile workshop stormwater runoff using gravel, granular activated carbon, rice husk and conventional oil and grease (O&G) trap

IF 1 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2022-01-26 DOI:10.17159/wsa/2022.v48.i1.3926

C. O. Ataguba, I. Brink

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Abstract

Oil and grease (O&G) removal efficiencies using 4 automobile stormwater treatment systems were investigated and compared. The treatment systems used were: low-cost granular activated carbon–rice husk (GAC–RH) filter system, river gravel–granular activated carbon (GR–GAC) filter system, rice husk only (RH) filter system and the conventional PVC O&G trap (COT). Sampling of automobile stormwater from the five selected automobile workshops was carried out using the manual grab sampling methods. The treatment involved filtration using the low-cost technologies and O&G separation from stormwater. GAC–RH exhibited the highest O&G removal with an average removal efficiency of 43.2% from all the automobile workshops, followed by RH with an average removal efficiency of 31%. O&G removal using GR–GAC and COT resulted in average removal efficiencies of 28.6% and 26.8%, respectively. Further studies need to be carried out to optimize the GAC and RH low-cost filter materials for the purpose of achieving the USEPA and Nigerian effluent standards of 0.1 mg/L, since all the treatment systems produced effluents with minimum concentrations ranging between 0.8 mg/L and 3.6 mg/L.

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砾石、颗粒活性炭、稻壳和常规油脂捕集器对汽车车间雨水径流中油脂的去除效果比较

研究并比较了4种汽车雨水处理系统去除油污的效果。采用的处理系统有:低成本颗粒活性炭-稻壳(GAC-RH)过滤系统、河砾石-颗粒活性炭(GR-GAC)过滤系统、纯稻壳(RH)过滤系统和常规PVC O&G捕集器(COT)。选取5个汽车车间，采用人工抓取采样法对汽车雨水进行采样。处理方法包括使用低成本技术进行过滤，并将油气与雨水分离。GAC-RH对所有汽车车间的O&G去除率最高，平均去除率为43.2%，RH次之，平均去除率为31%。使用GR-GAC和COT去除油气的平均效率分别为28.6%和26.8%。为了达到美国环保署和尼日利亚0.1 mg/L的污水标准，需要进行进一步的研究以优化GAC和RH低成本过滤材料，因为所有处理系统产生的废水的最低浓度范围在0.8 mg/L至3.6 mg/L之间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).