3 results about "Constructed wetland" patented technology

The invention discloses a method for constructing a multi-stage subsurface flow constructed wetland system, and the method comprises the following steps: (1) selecting a littoral zone with a slope as a wetland pond or digging and backfilling to get a wetland pond with a slope; (2) grading and filling a matrix, namely designing stages according to the pollution load and the height difference of slope, and filling the matrix in each stage of the wetland; (3) arranging drainage holes, water outlet holes and water inlet holes; (4) planting plants, namely planting the plants on each stage of the wetland respectively. The method disclosed by the invention has the following beneficial effects: (1) the system constructed by the method has no influence on the coastal zone structure of a landscape water body. (2) the system constructed by the method has a better purification effect on water flowing into rivers and water contaminated by the landscape water body, especially has an obvious purification effect on pollutants such as SS (Stainless Steel), oil and COD (Chemical Oxygen Demand) and has a good removal effect on heavy metals, TN and TP. (3) the system constructed by the present invention can integrate the purification function with the greening of coastal zones, so that the diversity of landscape is enriched and the overall landscape effect is improved.

The invention discloses a preparation method of modified biochar immobilized petroleum degrading bacterium microspheres, which comprises the following steps: taking reed biomass powder, carbonizing, and activating in CO2 atmosphere to obtain a modified biochar carrier; placing the modified biochar carrier and a petroleum degrading bacterium solution in an immobilized culture medium for mixed adsorption to obtain the modified biochar adsorbing the microbial inoculum; a chitosan solution is used as an embedding agent to embed the modified biochar adsorbing the microbial inoculum, and the modified biochar immobilized petroleum degrading bacterium microspheres are obtained. The reed biochar is modified in a CO2 activation mode, the specific surface area and the pore volume of the immobilized carrier are effectively increased, chitosan is adopted as an embedding material, the degradation efficiency of petroleum degrading bacteria on petroleum is effectively improved, waste reeds are recycled, the problem of constructed wetland waste disposal can be solved, and the method is suitable for industrial production. The resource utilization of wastes is realized.

The invention relates to a method for improving the constructed wetland decontamination effect by changing hydraulic conditions. The method comprises specific steps as follows: a, modelling of a constructed wetland; b, water inflow; c, bottom-layer aeration. By means of the method for improving the constructed wetland decontamination effect by changing the hydraulic conditions, the constructed wetland decontamination effect is effectively improved. According to the method, the gas-water ratio is controlled to be 6:1 through bottom-layer aeration, hydraulic loading is controlled, and the best decontamination effect is realized.