Giới thiệu chất gây ô nhiễm phân vùng trong các yêu cầu Airflow dưới bề mặt và Airflow Khả năng Khả năng Airflow Yêu cầu đánh giá các điều kiện ở đâu VES là áp dụng chất gây ô nhiễm thuộc tính hơi áp suất Độ hòa tan Henry của Luật Các thuộc tính phân tử Tóm tắt thông tin thuộc tính của các đất số lượng lớn mật độ / Đất độ xốp đất hấp phụ đất ẩm Site bề mặt địa hình Độ sâu nước Bảng Công cụ mô hình hóa đồng nhất cho hơi Khai thác Thiết. | Rorech Gregory J. Vapor Extraction and Bioventing In Situ Treatment Technology Boca Raton CRC Press LLC 2001 CHAPTER 3 Vapor Extraction and Bioventing Gregory J. Rorech CONTENTS Introduction Contaminant Partitioning in the Subsurface Airflow Requirements and Capabilities Airflow Capability Airflow Requirements Evaluation of Conditions Where VES is Applicable Contaminant Properties Vapor Pressure Solubility Henry s Law Other Molecular Properties Summary Properties of the Soil Bulk Density Soil Porosity Soil Adsorption Soil Moisture Site Surface Topography Depth to Water Table Site Homogeneity Modeling Tools for Vapor Extraction System Design Engineering Design Model Flow Models Multiphase Transport Models Pilot Studies Laboratory Studies 2001 CRC Press LLC Field Pilot Studies Vapor Extraction Testing Well Vapor Extraction Monitoring Wells Stage 1 Pilot Test Planning Stage 2 Conducting the Pilot Test Stage 3 Evaluating the Data Evaluation of Pneumatic Permeability Extraction Well Placement System Design Bioventing Introduction Advantages of Vapor Phase Biotreatment Performance Criteria and Bioventing Plan Protocols Laboratory Testing Field Respirometry Testing Soil Gas Permeability Testing Bioventing System Configurations Cleanup Goals Costs Case Study Design Operating Criteria Design Example Problem Solution Pilot Test Planning Conducting the Pilot Test Evaluating the Data References INTRODUCTION The vapor extraction and bioventing technologies induce airflow in the subsurface using an above-ground vacuum blower pump system. Adequate air movement within the contaminated zones is of primary importance to the success of the VES. The induced airflow brings clean air in contact with the contaminated soil NAPL and soil moisture. The contaminated soil gas is drawn off by the VES and the air in the soil matrix becomes recharged with new vapor phase contamination as the soil pore water soil gas NAPL partitioning is re-established. Bioventing or bioenhanced vapor extraction
