Anti-clogging efficient nitrogen and phosphorus removal constructed wetland substrate, constructed wetland and method
A technology for artificial wetlands, nitrogen and phosphorus removal, applied in the field of water treatment, can solve the problems of difficult to achieve the expected treatment effect of nitrogen and phosphorus removal, filling a single wetland matrix, etc., achieves good nitrogen and phosphorus removal effect, is conducive to adhesion, and improves the effect. Effect
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Embodiment 1
[0028] Embodiment 1: filter material selection
[0029] Five kinds of filter materials, volcanic rock, zeolite, ceramsite, biochar and limestone, were used to carry out static adsorption experiments on the tail water at the discharge outlet of the sewage plant, and 10g of different filter materials were weighed and added to 5 beakers containing 500mL tail water After medium-static adsorption for 12 hours, various water quality indicators in the water after adsorption were detected, and their removal effects on total nitrogen, total phosphorus, and ammonia nitrogen were compared. The results are shown in Table 1.
[0030] Table 1 Effect of different filter materials on sewage treatment effect
[0031]
[0032] From the static adsorption test results in Table 1, it can be seen that biochar, zeolite, limestone, and volcanic rock have better removal effects on pollutant concentrations, and the mixed use of zeolite and limestone filter materials will have a synergistic effect, w...
Embodiment 2
[0033] Embodiment 2: In this embodiment, a constructed wetland matrix combination for effective denitrification and phosphorus removal is provided, wherein the matrix combination is: gravel, zeolite, limestone and biochar, and its volume composition percentage is about: gravel 33.33%, zeolite 19.05% %, limestone 19.05%, biochar 28.57%. Specifically, the raw material requirements for each component of the constructed wetland matrix in this example are as follows:
[0034] According to the volume ratio of the constructed wetland substrate in this example, construct a 2.5m×2m×1.5m constructed wetland test pool, and the substrate laying of the test pool is as follows from bottom to top:
[0035] Gravel with a particle size of 16-32mm is used as the drainage layer 1, the laying thickness is 100mm, and the amount of gravel is 0.5m 3 .
[0036] Gravel with a particle size of 8-16mm is used as the transition layer 2, the laying thickness is 100mm, and the amount of gravel is 0.5m 3...
Embodiment 3
[0039] Example 3: According to the distribution ratio of matrix filler components in the constructed wetland in Example 2, the filled constructed wetland test pool is used to treat the tail water discharged from a certain urban sewage treatment plant, and the wetland water intake is 2m 3 / d, after a week of stable operation of the wetland, the influent and effluent water quality indicators were tested twice respectively. The treatment effect of the constructed wetland on nitrogen and phosphorus pollutants is shown in Table 2.
[0040] Table 2 Treatment effect of the artificial wetland of the present invention on tail water
[0041]
[0042]According to the distribution ratio of matrix filler components in the constructed wetland in Example 2, the drainage layer 1 (particle size: 16-32mm) with the same thickness and 100mm thickness composed of gravels with the same thickness is laid successively in this embodiment and another group from bottom to top, The transition layer is...
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Abstract
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