Code for Design of Outdoor Wastewater Engineering
室外排水设计规范
(2014 Edition)
1 General Provisions
1.0.1 This code was formulated with a view to making the wastewater engineering design in China implement the scientific outlook on development and comply with the national laws and regulations, and achieving the goals of prevention and control water pollution, enhancing and protecting environment, improving the health level of the people and ensuring the safety.
1.0.2 This code is applicable to the design of permanent outdoor wastewater engineering in the constructed, extended and renovated cities and towns, industrial areas and residential areas.
1.0.3 The design of wastewater engineering shall be mainly in accordance with the approved urban overall planning and wastewater engineering professional planning, shall be proceeded from the overall situation, and correctly handle the relation between industry and agriculture, urbanized areas and nonurbanized areas, short-term and long-term, concentration and dispersion, and discharge and utilization according to the planning age limit, engineering scale, economic benefit, social benefit and environmental benefit. Upon comprehensive verification, the design of wastewater engineering shall be able to accomplish environmental protection, economization of lands, advanced technology, economy and rationality, safety and reliability, and being suitable for local actual conditions.
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2 Terms and Symbols
2.1 Terms
2.1.1 Wastewater engineering, sewerage
Engineering of collecting, transporting, treating, recycling and disposing the wastewater and storm water.
2.1.2 Waste water engineering system
An entirety composed the wastewater and storm water collecting, transporting, treating, recycling and disposing facilities in a certain way.
2.1.3 Sewerage system
Way that collects and transports the urban wastewater and storm water in one district, including two basic ways: combined system and separate system.
2.1.4 Wastewater facilities
The general term of the pipes, structures, equipment and the like in the wastewater engineering.
2.1.5 Combined system
The sewerage way to collect and transport the urban wastewater and storm water by using the same pipe ditch system.
2.1.5A Combined sewer overflow
The condition that the water exceeding the interception capacity of combined waste water engineering system drains into the water body at the time of raining.
2.1.6 Separate system
The sewerage way to collect and transport the urban wastewater and storm water by separately using different pipe ditch systems.
1 General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3 Designed Flow Amount and Water Quality
3.1 Domestic Sewerage Amount and Industrial Wastewater Amount
3.2 Storm Water Amount
3.3 Combined Water Amount
3.4 Designed Water Quality
4 Sewerage Pipe Ditch and Ancillary Structures
4.1 General Requirements
4.2 Hydraulic Calculation
4.3 Pipe
4.4 Inspection Well
4.5 Drop Well
4.6 Water Seal Well
4.7 Storm Water Inlet
4.8 Intercepting Well
4.9 Water Outlet
4.10 Drainage of Interchange
4.11 Inverted Siphon
4.12 Ditch
4.13 Pipe Integration
4.14 Strom Water Storage Tank
4.15 Storm Water Infiltration Facilities
4.16 Comprehensive Utilization of Storm Water
4.17 Local Flooding Prevention and Control Facilities
5 Pumping Stations
5.1 General Requirements
5.2 Designed Flow Amount and Designed Head
5.3 Collecting Tank
5.4 Design of Pump House
5.5 Outlet Water Facilities
6 Wastewater Treatment
6.1 Site Selection and General Layout
6.2 General Requirements
6.3 Bar Screen
6.4 Grit Chamber
6.5 Settling tank
6.6 Activated Sludge Process
6.7 Chemical Phosphorus Removal
6.8 Oxygen Supply Facilities
6.9 Biofilm Process
6.10 Returned Sludge and Excess Activated Sludge
6.11 Natural Treatment of Wastewater
6.12 Advanced Wastewater Treatment and Recycling
6.13 Sterilization
7 Sludge Treatment and Disposal
7.1 General Requirements
7.2 Sludge Thickening
7.3 Sludge Digestion
7.4 Mechanical Sludge Dewatering
7.5 Sludge Delivery
7.6 Sludge Drying and Incineration
7.7 Sludge Integrated Application
8 Inspection and Control
8.1 General Requirements
8.2 Inspection
8.3 Control
8.4 Computer Control and Management System
Appendix A Method of Establishing Rainfall Intensity Formula
Appendix B Minimum Clearance of Sewerage Pipes and Other Underground Pipelines (Structures)
Explanation of Wording in This Code
