US 12,269,757 B2
Highway sponge-type composite side ditch carbon neutralization system and method thereof
Xuexin Liu, Beijing (CN); Jiding Chen, Beijing (CN); Shuangcheng Tao, Beijing (CN); Yaping Kong, Beijing (CN); Xinjun Wang, Beijing (CN); Shuohan Gao, Beijing (CN); and Shanqian Huang, Beijing (CN)
Assigned to China Academy of Transportation Sciences, (CN)
Filed by China Academy of Transportation Sciences, Beijing (CN)
Filed on Apr. 14, 2022, as Appl. No. 17/720,315.
Claims priority of application No. 202110410338.4 (CN), filed on Apr. 16, 2021.
Prior Publication US 2022/0332601 A1, Oct. 20, 2022
Int. Cl. C02F 1/28 (2023.01); C02F 1/40 (2023.01); C02F 3/34 (2023.01); C02F 101/10 (2006.01)
CPC C02F 1/288 (2013.01) [C02F 1/40 (2013.01); C02F 3/348 (2013.01); C02F 2101/10 (2013.01); C02F 2201/002 (2013.01); C02F 2305/14 (2013.01); C02F 2307/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A highway sponge-type composite side ditch carbon neutralization system, comprising three units, wherein the three units are a silt pre-sedimentation channel, a filtering and oil-absorbing channel, and an ecologic purification channel, wherein,
the silt pre-sedimentation channel, the filtering and oil-absorbing channel, and the ecologic purification channel are connected horizontally and successively;
road runoff enters the silt pre-sedimentation channel from an inlet ditch, flows into the filtering and oil-absorbing channel from the silt pre-sedimentation channel, consecutively flows into the ecological purification channel and flows out from an outlet ditch after being treated, wherein the silt pre-sedimentation channel comprises:
a first water inlet and a first water outlet arranged at middle-upper parts of a first water inlet side and a first water outlet side of the silt pre-sedimentation channel respectively;
a sand collecting bucket arranged at a first bottom portion towards the first water inlet side; and
a sludge converging slope inclined at an angle from the first water outlet side towards the first water inlet side, wherein the sludge converging slope is arranged at a bottom plate of the silt pre-sedimentation channel;
effluent water from the silt pre-sedimentation channel is received by the filtering and oil-absorbing channel through the first water outlet at a middle-upper part of a second water inlet side of the filtering and oil-absorbing channel wherein, the filtering and oil-absorbing channel further comprises:
a second water outlet arranged at a bottom portion of a second water outlet side of the filtering and oil-absorbing channel;
a second filtering layer comprising second filter materials;
a first filtering layer comprising first filter materials; and
an oil-absorbing fiber layer; and
grating plates, wherein,
the second filtering layer, the first filtering layer and the oil-absorbing fibre layer are arranged in the filtering and oil-absorbing channel from bottom to top; and
the grating plates are arranged at a top of the second filtering layer and at a top of the first filtering layer, wherein the grating plates are configured to prevent filter materials from floating up and floating away;
effluent water from the filtering and oil-absorbing channel is received by the ecologic purification channel through the second water outlet into a third water inlet at a bottom portion of a third water inlet side of the ecological purification channel, wherein the ecologic purification channel comprises:
a modified volcanic rock layer;
a sawdust layer;
a modified ceramsite layer comprising modified ceramsites, wherein the modified ceramsite is formed by combined processing of zeolite, fly ash and calcium carbonate;
a configured planting soil layer;
carbon sink vegetation; and
a third water outlet,
wherein,
the modified volcanic rock layer, the sawdust layer and the modified ceramsite layer are arranged successively in the ecologic purification channel from bottom to top;
the sawdust layer is filled with sawdust, wherein each of the sawdust particle has a particle size of 30 mm and the sawdust layer is doped with microbial quick-dissolving balls at a volume ratio of 10%;
the modified ceramsite layer is filled with modified ceramsites, wherein each of modified ceramsite has a particle size of 20 mm and the ceramsite layer is doped with microbial quick-dissolving balls at a volume ratio of 20%, wherein, each of the microbial quick-dissolving balls in the saw dust layer and the modified ceramsite layer are configured to be:
internally filled with functional microorganisms for deep nitrogen and phosphorus removal; and
externally packed with PVA that gradually dissolves in water to uniformly disperse the functional microorganisms filled within; and
the third water outlet is arranged over the configured planting soil layer of the ecologic purification channel at a third water outlet side.