Comprehensive remediation method for hard-base urban black and odorous river channel
A river channel and substrate technology, applied in chemical instruments and methods, polluted waterways/lakes/ponds/rivers treatment, water/sludge/sewage treatment, etc., can solve problems such as black and odorous rivers, achieve self-purification ability improvement, The effect of restoration of water body landscape function
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Embodiment 1
[0033] The black and smelly river channel in a city with a broken head and a hardened base. The experimental site is about 750m in length, 16m in average width, 1.7-2.2m in water depth, 1.95m in average depth, and the maximum variation in water level is 0.5m. The main pollutants in the river and concentrations are shown in Table 1 below. Water pollution is characterized by nitrogen nutrients and organic pollutants, and the main pollution factors are ranked as follows: ammonia nitrogen > DO > BOD 5 >Petroleum >COD, the water color is black and smelly, and the water quality category is inferior to the fifth category. The sources of pollutants are domestic sewage and rainwater. The average values of each pollution index in the past five years are shown in Table 1 below:
[0034] Table 1
[0035]
[0036] The method for comprehensive treatment of black and odorous rivers in cities with hardened bases, including repairing technology on both sides of the river, improving tec...
Embodiment 2
[0046] The method of embodiment 2 is the same as that of embodiment 1, and the difference is that in the step (1), the volcanic rock with a thickness of 1 cm is tiled in the plate as the matrix material, and is sewed with a nylon mesh at a rate of 2 g / m. 2 The density is evenly sowed grass seeds. Choose to plant wisteria for vines and ryegrass for turf. In step (2), the emergent plant is canna, and the hydraulic retention time of the rainwater runoff ecological flower bed is 3 days. . The backfill thickness in step (3) is 10cm. In step (4), the thickness of the wire ring pad is 2cm, and the size is 0.2m 2 . In step (5), the service radius of each push flow aeration system is 30m, and the two sets of aeration equipment are set at intervals of 80m. Step (6) select the vigorous cress in winter and spring; select the vigorous yellow calamus in summer and autumn.
Embodiment 3
[0048] The method of embodiment 3 is the same as that of embodiment 1, and the difference is that in the step (1), the volcanic rock with a thickness of 5 cm is tiled in the plate as the matrix material, and is sewed with a nylon mesh at a rate of 10 g / m. 2 The density is evenly sowed grass seeds. Choose stellite for vines and ryegrass for turf. The backfill thickness in step (3) is 100cm. In step (4), the thickness of the wire ring pad is 10cm, and the size is 5m 2 . In step (5), the service radius of each push flow aeration system is 60m, and the two sets of aeration equipment are set at intervals of 160m. In step (6), the vigorous Siberian iris is selected in winter and spring, and the vigorous vetiver is selected in summer and autumn.
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Abstract
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