Device and method for reinforcing removal capacity of organic matters in wetland ecological system

An ecosystem and organic matter technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. Improve electron transport performance, efficient conversion and utilization

Active Publication Date: 2012-09-12
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device for strengthening the removal performance of organic matter in the wetland ecosystem, to solve the problem of organic matter accumulation in the wetland and poor electron transfer performance in the wetland matrix, thereby inhibiting various biochemical reaction activities in the wetland, especially rhizosphere microorganisms activity, which severely restricts the organic matter removal performance of the wetland system

Method used

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  • Device and method for reinforcing removal capacity of organic matters in wetland ecological system
  • Device and method for reinforcing removal capacity of organic matters in wetland ecological system
  • Device and method for reinforcing removal capacity of organic matters in wetland ecological system

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Embodiment 1

[0034] Carbon felt was used as the electrode material with an external resistance of 100 Ω. The graphite rod was used as the anode and placed 5 cm below the water-sediment interface. The sediment and overlying water were collected from East Taihu Lake (31°10′ N, 120°24′ E ), to build a sediment microbial fuel cell system (SMFC) indoors. The concentration of toxic organic pollutants (polycyclic aromatic hydrocarbons TPAH) contained in the sediment was 15 mg / kg DW, and the SMFC unit was operated for 240 days. Figure 4 It is a schematic diagram of the removal performance of organic matter in the sediment microbial fuel cell system, as shown in the figure, the results show that the removal rate of organic matter (expressed as loss on ignition LOI) in the sediment by the control group (without using SMFC) is 32%; while the SMFC group The removal rate of LOI is 53% (such as Figure 4 shown). The degradation rate of TPAH in the control group was 77.4 %, while that of the SMFC grou...

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Abstract

The invention relates to a device and method for reinforcing the removal capacity of organic matters in a wetland ecological system. The device comprises a water distributing system, a water collecting system, a substrate, plants and a sediment microbial fuel cell system, wherein the water distributing system is arranged at the front end of a wetland, the water collecting system is arranged at the back end of the wetland, the substrate is arranged inside the wetland, and the plants are planted on the substrate. The invention also provides a method for reinforcing the removal capacity of the organic matters in the wetland ecological system. For the device, the sediment microbial fuel cell system is added in the wetland, and a positive pole is used as an electron acceptor so as to promote electrons released when microbes nearby the root zones of the plants in the wetland decompose and metabolize the organic matters to transfer, and then the electrons are transmitted to a negative pole positioned at the upper part of the wetland, thereby reducing the accumulation of the electrons when the organic matters nearby the root zones of the plants in the wetland are metabolized, greatly increasing the activity of microbial decomposing the organic matters and reinforcing the removal capacity of the organic matters.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and resource utilization, and relates to a device and method for enhancing the removal performance of organic matter in wetland ecosystems, in particular to a device and method for accelerating the rate of microbial decomposition of organic matter by using an auxiliary battery system. Background technique [0002] With the operation of constructed wetlands or natural wetlands, the total amount of organic matter accumulated in wetlands generally exceeds the total amount of organic matter contributed by wastewater. The amount of organic matter accumulated in wetland systems with plants was 1.2-2 kg / m higher than that without plants under the same conditions 2 . The accumulation of organic matter in the wetland leads to the blockage of the wetland system, which deteriorates the ventilation between the wetland substrates and affects the activity of wetland microorganisms. In addition, the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 江和龙晏再生赵志伟
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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