Device and method for in-situ recovery of phosphorus in water body
A water body and in-situ technology, applied in the direction of ion exchange water/sewage treatment, etc., to achieve high recycling rate, improve water quality, and low equipment cost
Active Publication Date: 2012-04-04
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology
There are few reports on technical research and engineering application of phosphorus recovery (low phosphorus concentration) from eutrophic water bodies
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[0015] The present invention is described in detail below in conjunction with embodiment and with reference to accompanying drawing: figure 1 It shows that there is a sheet-like floating object 1 on one side of the serial body, and there is a sinking object 3 below, which can be a tubular object with sand and gravel inside. One port can be opened and closed, and the amount of sand and gravel can be increased or decreased as needed for gravity adjustment. In order not to block the water flow, there are longitudinal water-through seams on the sheet-like float 1 between each anion exchange resin bag (hereinafter referred to as the bag) 2, and the available density of the sheet-like float 1 is 0.91-0.93g / cm 3 Made of high-quality polyethylene vinyl acetate (EVA), the thickness is 1-3.5mm, the height and width match the height and width of each bag or series body, or the whole piece can match the series body, the latter needs to be placed between the bag and the bag Open a water-th...
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The invention discloses a device for in-situ recovery of phosphorus in water body. The device comprises an anion exchange resin column, wherein the anion exchange resin column is bag-shaped; anion exchange resin with filling rate of 1-3 kg / m<2> is filled in the bag and the bag is sealed; the bag is a flat blocky chemical blended fabric bag, which is called anion exchange resin bag (2); a plurality of such anion exchange resin bags (2) are vertically and serially connected into one or two rows of serial bodies in parallel; a float (1) or pull rope (4) is connected on one side of or in the middle of or above the serial bodies; precipitate (3) or a bottom pile (5) to tie the rope is formed below the serial bodies; and the height and the width of the serial bodies are close to the depth and the width of river water to be treated. A method for in-situ recovery of the phosphorus in the water body by using the device comprises three steps of: 1, placing and selecting points; 2, promoting water body turbulent motion; and 3, recovering the phosphorus and repeatedly utilizing the serial bodies. By removing the phosphorus with the device and the matched method, the water quality effect is improved, the cost is low, the operation is convenient, and a high cyclic utilization rate is guaranteed.
Description
technical field [0001] The invention relates to the technical field of environmental protection, in particular to a device and method for recovering phosphorus in water in situ. Background technique [0002] Phosphorus is one of the key elements that cause eutrophication of water bodies. Excessive phosphorus will cause red tides and endanger the water environment of rivers, lakes, and oceans. It is generally believed that when the total phosphorus (TP) content in water reaches 0.015mg.L -1 enough to cause eutrophication of water bodies. According to the 2010 China Environmental Status Bulletin, 54.8% of the 26 state-controlled key lakes (reservoirs) are in a state of eutrophication, and the main pollution indicators are total phosphorus and total nitrogen. Phosphorus removal technologies in water can be divided into three categories: biological methods, physical methods and chemical methods. The biological method can make the phosphorus removal rate exceed 80%, but it need...
Claims
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Inventor 肖继波褚淑祎
Owner ZHEJIANG FORESTRY UNIVERSITY