Riverway permeable reaction wall system and use thereof
A technology of permeable reactive walls and river channels, which is applied in water/sewage treatment, water/sludge/sewage treatment, biological water/sewage treatment, etc., to achieve a wide range of applications, low operation and maintenance costs, and good results
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Embodiment 1
[0032] One river flows into the lake with an average water depth of 2.0m. The embankment follows a natural gentle slope with a width of 4-6.5m at the top of the embankment. Generally, the height of the embankment top is 2.0m. Since the middle and upper reaches of the river flow through a certain urban area, the sources of incoming water pollution are mainly urban domestic sewage and some industrial wastewater, and the average water quality is: COD Cr 57.34mg / L, TN10.60mg / L, TP0.61mg / L, the river water quality is black and smelly.
[0033] In order to restore the water quality of the river, a semi-buried river PRB system was established on one side of the embankment (the schematic diagram is shown in figure 2As shown), excavate one meter down to the top of the embankment, and transport the excavation outside. In order to ensure the safety of the embankment, a number of pine piles with a length of about 1.5m are driven into the bottom surface in a format of 0.5m×0.5m. After exc...
Embodiment 2
[0036] One river is a typical urban pollution-receiving river with an average water depth of 2.5m. The embankment follows a natural gentle slope with a width of 4.5-6m at the top of the embankment. Generally, the height of the embankment top is 2.0m. The source of water pollution is mainly urban domestic sewage, and the average water quality is: COD Cr 75.91±27.98mg / L, TN5.02±1.90mg / L, TP0.25±0.12mg / L, the river water quality is black and smelly.
[0037] In order to restore the water quality of the river, a ground-based river PRB system (such as image 3 shown), the system consists of a single water treatment unit, and the dimensions of each part are: water inlet tank 4 length 150cm×width 216cm×height 150cm, PRB wall 6 length 276cm×width 216cm×height 120cm, outlet tank 9 length 40cm×width 216cm x 120cm high, for anti-seepage, the bottom and side of the system are treated with anti-seepage. The system uses iron filings, coke and zeolite as the reaction medium, the volume rat...
Embodiment 3
[0040] In this embodiment, on the basis of the system in Embodiment 2, the non-point source pollution near the river course is also included in the treatment category of the system (the improved system is as follows Figure 4 shown).
[0041] With the advancement of centralized non-point source agricultural sewage treatment projects in villages and towns, after January 2008, most of the non-point source pollution entering the river near the river in Example 2, such as agricultural sewage in farmland and vegetable fields, has been concentrated. The average water quality of this part of sewage entering the river is COD Cr 94mg / L, TN21.5mg / L, TP1.3mg / L.
[0042] Use the river PRB system in Example 2 to treat this part of the sewage according to the original working conditions, and then discharge it into the river. The system began to operate according to this working condition in February 2008. After continuous operation, good results have been achieved. Non-point source The wa...
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Abstract
Description
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