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Kế hoạch, đánh giá khả thi, và lựa chọn địa điểm Khi Tiến hành xử lý nước thải và tái sử dụng / Xử lý lập kế hoạch nghiên cứu, nó IS quan trọng để Đánh giá lựa chọn thay thế như nhiều như có thể để đảm bảo hệ thống Hầu hết đó thích hợp và hiệu quả được chọn. Đối với cộng đồng mới hoặc unsewered, chọn phân cấp nên trở Cũng bao gồm trong các kết hợp của lựa chọn thay thế (Crites và Tchobanoglous, 1998). Các Tính khả thi của quy trình điều trị tự nhiên đó. | 2 Planning Feasibility Assessment and Site Selection When conducting a wastewater treatment and reuse disposal planning study it is important to evaluate as many alternatives as possible to ensure that the most cost-effective and appropriate system is selected. For new or unsewered communities decentralized options should also be included in the mix of alternatives Crites and Tchobanoglous 1998 . The feasibility of the natural treatment processes that are described in this book depends significantly on site conditions climate regulatory requirements and related factors. It is neither practical nor economical however to conduct extensive field investigations for every process at every potential site during planning. This chapter provides a sequential approach that first determines potential feasibility and the necessary land requirements and site conditions of each alternative. The second step evaluates each site coupled with a natural treatment process based on technical and economic factors and selects one or more for detailed investigation. The final step involves detailed field investigations as necessary identification of the most cost-effective alternative and development of the criteria necessary for the final design. 2.1 CONCEPT EVALUATION One way of categorizing the natural systems is to divide them between discharging and nondischarging systems. Discharging systems would include those with a surface water discharge such as treatment ponds constructed wetlands and overland flow land treatment. Underdrained slow rate or soil aquifer treatment SAT systems may also have a surface water discharge that would be permitted under the National Pollutant Discharge Elimination System NPDES . Nondischarging systems would include slow rate land treatment and SAT onsite methods and biosolids treatment and reuse methods. Site topography soils geology and groundwater conditions are important factors for the construction of discharging systems but are often critical .
