英文材料 --污水处理和回用新技术参考课件

Items compared
COD removal
total Phosphorus Removal
Suspended Matter Removal
Nitrate Nitrogen Removal Ammonia
Nitrogen Removal
Subsurface Flow Constructed Wetland
Sewage
Pre-treatment
Roots Active Soil
Gravel pipeline
Gravel pipeline
Mineral layer Microorganism at the root
Water o
HDPE impermeable membrane
Comparison table of pollutant removal performance of constructed wetland
5
Layout Diagram of the Vertical Face for Vertical Subsurface Flow Constructed Wetland
6
The Structure of the System of Horizontal Subsurface Flow Constructed Wetland for Sewage TreBaidu Nhomakorabeatment
New Technology and Application Examples on Sewage Treatment and
Reclamation
New Technology on Sewage Treatment and Reclamation
➢ Underground SBR sewage treatment technology
Water outlet BOD5
October 1997
9
Selection of Plants for Constructed Wetland
Main Plants to choose
Ornamental plant
Reed Canna
Typha Iris
10
Technical features of Constructed Wetland
Large occupying area and earthwork, long construction period; liable to clog
Development trends:
Fabricated constructed wetland, strengthen
the technology of combining nitrogen and
The key points of design:
Anti-clogging, anti-freeze and anti-flood
Advantages:
Easy to manage and Simple to maintain;
Low operation coat （1/10 — 1/6） Weaknesses:
SBR technological
innovation
Anaerobic bed unpowered treatment technology
Anaerobic d
Absorption
Eco-treatment for sewage
Membrane bioreactor Constructed
technology
phosphorus
11
Project Example of Constructed Wetland （1)
Domestic Sewage in Rural Area
Sewage
Septic pool
Grill
Pre-treatment
Irrigation
Medium water pool
Emission
wetland
technology
Predation with class
Constructed Wetland for Sewage Treatment
3
Flow Diagram of System of Constructed Wetland for Sewage Treatment
Pre-treatment facility
Plants in Wetland （reed）
Water inlet management
Pre-treatment
Roots and mediator
impermeable membrane
Original soil horizon
wetland
Water outlet distribution
Water level contr
Water outle pipeline water o4utlet
Diagram of Vertical Flow Wetland Purifying system
垂直流潜流式
Water inlet
Pump
water level control
Water outlet
➢ Unpowered anaerobic sewage treatment technology
➢ Sewage Eco-treatment technology ➢ Constructed wetland for sewage treatment
technology ➢ Membrane bioreactor technology
Constructed wetland
12
Project Example of Constructed Wetland （1)
13
Project Example of Constructed Wetland（1)
14
Project Example of Constructed Wetland （2)
Sewage Treatment in Towns
High High
High
High
Low
Surface Flow Constructed Wetland
Low Low
Low Low High
8
the Operation Effect of Constructed Wetland（BOD5）
water inlet BOD5
January 1986