tailieunhanh - REMEDIATION OF PETROLEUM CONTAMINATED SOILS - SECTION 7

Giám sát xử lý sinh học Để chứng minh rằng phân hủy sinh học đang diễn ra trong lĩnh vực này, dân số hóa học hoặc vi sinh vật phải được hiển thị thay đổi theo những cách mà có thể dự đoán nếu xử lý sinh học xảy ra (Hội đồng Nghiên cứu Quốc gia, 1993). Các phép đo mẫu lĩnh vực, các thí nghiệm hoạt động trong lĩnh vực này, và các thí nghiệm mô hình có thể cải thiện sự hiểu biết của chúng ta về số phận của các chất gây ô nhiễm. Một phương pháp biotreatability. | Section 7 Monitoring Bioremediation In order to demonstrate that biodegradation is taking place in the field the chemistry or microbial population must be shown to change in ways that would be predicted if bioremediation were occurring National Research Council 1993 . Measurements of field samples experiments run in the field and modeling experiments can all improve our understanding of the fate of the contaminants. A bench-scale biotreatability methodology has been designed to assess bioremediation of contaminated soil in the field Saberiyan MacPherson Andrilenas Moore and Pruess 1995 . The first phase involves characterization of the physical chemical and biological aspects of the contaminated soil where soil parameters contaminant type presence of indigenous contaminant-degrading bacteria and bacterial population size are defined. The second phase is experimentation consisting of a respirometry test to measure the growth of microbes indirectly via generation of CO2 and the consumption of their food source directly via contaminant loss . The half-life of a contaminant can be calculated by a Monod kinetic analysis. Abiotic losses are accounted for based on a control test. The contaminant molecular structure is used to generate a stoichiometric equation which yields a theoretical ratio for milligrams of contaminant degraded per milligrams of CO2 produced. Data collected from the respirometry test are compared with theoretical values to evaluate bioremediation feasibility. A field-portable instrument is being tested to utilize infrared transmitting optical fibers and Fourier transform infrared spectroscopy FTIR to perform a quick and accurate chemical analysis of unknown waste materials at a contaminated site without removing a sample for analysis Druy Glatkowski Bolduc Stevenson and Thomas 1995 . There should be the use of chemical analytical data in mass balance calculations and there should be laboratory microcosm studies using samples collected from the site as