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A technology of domestic sewage and treatment process, applied in biological water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. , to achieve the effect of improving anaerobic efficiency
Inactive Publication Date: 2009-07-08
江苏百纳环境工程有限公司
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The disadvantage of this method is: based on the limitations of the anaerobic effect, the sewage treatment effect is very obvious for high-concentration domestic sewage, that is, the COD value is between 3000 and 30000; for low-concentration bottom domestic sewage, the COD value is between 100 and 300 The room efficiency is relatively low, and it is difficult for the effluent to meet the standard with a single treatment method
The disadvantage of this method is: for low-concentration domestic sewage in rural areas or communities, that is, sewage with a COD value between 100 and 300, the biochemical property is very good. After adopting dynamic aeration, the effluent can meet the discharge standard, but the power consumption is relatively large. , it is difficult to popularize small-scale rural sewage treatment
(Disadvantages: only the use of rural sewage, and the output of biogas must be very small, the production of biogas has not substantially improved the energy used in rural life, and the maintenance workload is large, and it is difficult to promote
The disadvantage of this is that the wetland or plant absorption is set after one of the above treatment methods to further absorb and degrade the pollutants in the water
Although this method successfully solves the problems of energy consumption and water quality discharge, the wetland covers a large area and the construction cost is high. The domestic sewage discharged by a natural village of 50 households occupies an area of 1200m2 2 Left and right; or adopt a three-dimensional multi-layer structure, although the land area is greatly reduced, but the follow-up brings huge civil engineering costs and complex structures
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Embodiment 1
[0030] Such as figure 1 As shown, the new rural / community domestic sewage treatment equipment of the present invention comprises a fine grid tank, anaerobic tank, intermediate adjustment tank, anoxic adsorption tower, aerobic biological reaction tower and artificial wetland pond, and the fine grid tank is successively connected with The anaerobic pool is connected, the intermediate adjustment pool, the anoxic adsorption tower, the aerobic biological reaction tower, and the artificial wetland pond are connected. The artificial wetland pond is a steel concrete structure, and there are duckweed, emergent plants and various fish and shrimps inside, forming a small ecological chain system. The emergent plant is one of water onion, Zizania japonica, calamus, centipede or zilihua, and the floating plant is one of milkweed, big drift or duckweed.
[0031] Such as figure 2 As shown, the anoxic adsorption tower includes a shell 1, a water inlet 2, a mud collecting bucket 3, a mud col...
Embodiment 2
[0035] Domestic sewage treatment process of the present invention, comprises the steps:
[0036] (1) Anaerobic and anoxic section: The sewage first passes through the preliminary filtration of the fine grid tank to filter out the particulate matter. Among them, the temperature of the sewage entering the fine grid tank is 20°C, the COD in the sewage is 250mg / L, the BOD is 150mg / L, and the NH 3 -N is 35mg / L, P is 2mg / L, PH value is 8, sewage volume is 2t / h; effective volume of fine grid pool: 1.5L×1B×3H=4.5m 3 .
[0037] The effluent from the fine grid tank flows into the anaerobic tank for degradation reaction. The effective volume of the anaerobic tank: 1.5L×3B×3H=13.5Hm 3 , residence time 6h. The anaerobic tank degrades the solid substances in the sewage into soluble substances, and the macromolecular substances are degraded into small molecular substances. The main products are acetic acid, butyric acid and propionic acid, which greatly promotes the reaction efficiency of...
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Abstract
The invention discloses a domestic sewage treatment process, which comprises the following steps that: sewage enters an anaerobic pond to carry out a degrading reaction after being filtered, outlet water automatically flows into a middle adjusting pond, and outlet water of an artificial wetland pond part flows back to the middle adjusting pond; water of the middle adjusting pond enter oxygen lack environment, high-concentration mud in the sewage is discharged to the anaerobic pond, and NO2-NO3-N ions in circulating water are subjected to denitrification under the oxygen lack environment; the outer water after an oxidation reaction automatically flows into an aerobiont reaction tower; and the outlet water of the aerobiont reaction tower automatically flows into the artificial wetland pond of which the inside is provided with emergent aquatic plants, floating plants, fish and shrimps. The invention also discloses domestic sewage treatment equipment. On the basis of the prior domestic sewage treatment mode, the method sufficiently utilizes the low cost of an anaerobic wetland method and the high efficiency of an aerobiont method, and greatly reduces the cost of the water treatment. The whole flow does not needed to add medicines, and reduces the cost. Power consumption only comes from a lifting pump of the middle adjusting pond, and energy consumption is greatly saved.
Description
technical field [0001] The invention relates to a domestic sewage treatment process and equipment. Background technique [0002] With the development of the economy, a large amount of nitrogen (N) and phosphorus (P) wastewater is discharged into rivers, lakes and other water bodies, resulting in serious eutrophication of many rivers and lakes. In 2001, the national rural domestic sewage discharge was about 8.32 billion tons, and the biochemical oxygen demand (COD), nitrogen and phosphorus losses were converted according to the per capita discharge intensity. The total COD and total nitrogen (TN ) and total phosphorus (rrP) were 8.321 million tons, 582,000 tons and 141,500 tons, respectively. A large number of pollutants in domestic sewage aggravate the pollution of the receiving water body, causing the water quality to deteriorate, especially the sewage contains a large amount of nitrogen and phosphorus, which will make the water body eutrophic, which is one of the importan...
Claims
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