Rural drinking water biological slow filtration arsenic removal facility
A drinking water and biological technology, applied in the direction of water pollutants, biological treatment devices, sustainable biological treatment, etc., can solve the problem of low adsorption capacity, achieve the effect of no secondary pollution, simple structure, and low production cost
Pending Publication Date: 2017-05-24
TSINGHUA UNIV
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Problems solved by technology
However, the most toxic trivalent arsenic in groundwater exists in an uncharged molecular state under neutral conditions, and the adsorption capacity of the adsorbent for trivalent arsenic is low.
Method used
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Embodiment
[0020] The first-level biological slow filtration equipment includes water inlet, water outlet and tank body. The tank body is a plastic bucket with a height of 70 cm and a diameter of 38 cm. The inside of the tank body is a static water layer and a biofilm layer with a height of 5 cm from top to bottom. , Arsenic removal adsorption layer, filter layer and supporting layer.
[0021] The height of the static water layer in the first-level biological slow filtration equipment is 5cm, and the upper part of the static water layer is a free water surface; the filler of the biofilm layer is quartz sand, and its particle size is 1mm, and the filler height is 3cm; the arsenic removal adsorption layer The filler of the filter layer is 5kg iron nails; the filler of the filter layer is quartz sand, the particle size range is 1mm, and the filler height is 32cm; The filler height is 3cm, the particle size range of the lower layer filler is 5-13mm, and the filler height is 7cm; the maximum ...
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Abstract
The invention relates to a rural drinking water biological slow filtration arsenic removal facility which comprises two stages of biological slow filtration facilities, wherein the primary biological slow filtration facility comprises a water inlet, a water outlet and a tank body, and the inside of the tank body is respectively composed of a still water layer, a biofilm layer, an arsenic removal adsorption layer, a filter layer and a supporting layer from top to bottom; the secondary biological slow filtration facility comprises a water inlet, a water outlet and a tank body, and the inside of the tank body is respectively composed of a still water layer, a biofilm tier, a filter layer and a supporting layer from top to bottom; the water outlet of the primary biological slow filtration facility is connected with the water inlet of the secondary biological slow filtration facility through a pipeline; the bottom elevation of the water outlet connecting pipeline of the primary biological slow filtration facility is the same as the elevation of the top layer of the primary still water layer; and the bottom elevation of the water outlet connecting pipeline of the secondary biological slow filtration facility is the same as the elevation of the top layer of the secondary still water layer. The rural drinking water biological slow filtration arsenic removal facility is suitable for rural residents to use, has the characteristics of simple structure, lower cost, smaller volume, favorable filtration effect and no secondary pollution, and is convenient to operate.
Description
technical field [0001] The invention relates to a device for removing arsenic from rural drinking water, in particular to a device for removing arsenic by biological slow filtration filled with iron nails. Background technique [0002] Arsenic and arsenic compounds are recognized as human carcinogens, and the problem of arsenic pollution in groundwater is very common at present. The hazards of high-arsenic groundwater to the human body mainly include skin contact, direct drinking, and eating. Arsenic is cumulative and chronically toxic. Long-term accumulation will directly endanger human health. It can cause dermatitis, skin hyperkeratosis, skin pigmentation, and clinical manifestations mainly in the digestive system and nervous system, and even cause serious diseases such as skin cancer and lung cancer. The latest national drinking water standard (GB5749-2006) stipulates that the maximum concentration of arsenic in drinking water must be less than 0.01mg / L. Among them, the...
Claims
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IPC IPC(8): C02F3/10C02F101/20
CPCC02F1/001C02F3/107C02F2203/006C02F2101/20Y02W10/10
Inventor 刘书明史凯特吴雪
Owner TSINGHUA UNIV