Mixed inflow denitrification type constructed rapid infiltration system
A technology of artificial rapid infiltration and denitrification, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. The system covers a large area and other problems, so as to reduce the difficulty of equipment design and operation, make the acid-base balance easier, and reduce the dependence on carbon sources.
Active Publication Date: 2016-10-26
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
However, the artificial rapid infiltration system occupies a large area, and the total nitrogen index of the treated domestic sewage does not meet the first-level A standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002)
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[0015] In the experiment, the mixed fermentation water of experimental configuration wastewater and domestic sewage was used as the sewage to be treated. The sewage NH 4 + The concentration is 35-40mg / L, and the COD content is 250-300mg / L.
[0016] Pour the wastewater from the distribution pool into the aerobic section and the mixing pool in a ratio of 5:4. At the same time, the water stop valve of the aerobic section is opened and the water stop valve of the mixing tank is closed. After all the sewage in the aerobic section is filtered, open the water stop of the mixing tank. The valve is fully mixed and poured into the anaerobic section for denitrification.
[0017] At this time, the mixed water contains 5:4 NO 3 — And NH 4 + (In terms of nitrogen) and nearly half of the organic matter in the raw water, NO in the water 3 — Concentration 19-22mg / L, NH 4 + Concentration 15-17mg / L, COD concentration 130-150mg / L, the concentration of organic carbon source fully meets the progress of d...
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Abstract
A mixed inflow denitrification type constructed rapid infiltration system combines with high nitrate nitrogen outflow of a traditional CRI (constructed rapid infiltration) system, is added with an aerobic section and denitrifies the high nitrate nitrogen outflow with raw water proportionally, nitrate nitrogen may perform denitrification by using an organic carbon source of wastewater itself, and ammonia nitrogen of wastewater may be subjected to anaerobic ammoxidation denitrification under the action of anammox bacteria by using denitrification intermediate product, nitrite (NO2-). The system may perform denitrification by using the carbon source of wastewater itself, has low dependence on the carbon source and may perform effective denitrification just with very little organic carbon in original wastewater in later stage. The system is simple in overall upgrade, simple to produce and manufacture, low in cost, high in wastewater treating capacity and easy to popularize, and an existing constructed rapid infiltration system may also be added with an anaerobic tank and a wastewater mixing tank for modification.
Description
Technical field [0001] The invention relates to the technical field of sewage and wastewater treatment equipment, in particular to the improvement of the total nitrogen removal rate of an artificial rapid infiltration system. Background technique [0002] With the rapid development of industry and agriculture in the country and the continuous advancement of urban-rural integration, water shortages and serious water pollution have become one of the main problems faced by all parts of the country. Most of the traditional sewage treatment technologies can treat COD, suspended solids and other substances in the sewage, but the effect on nitrogen and phosphorus is not obvious. The latest news shows that phosphorus and nitrogen have been ranked 3rd and 4th respectively in the ranking of sewage hazardous substances. . According to incomplete statistics, the content of nitrate nitrogen in groundwater in my country has soared sharply in the past six years, rising more than 10 times in so...
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IPC IPC(8): C02F3/30
CPCC02F3/306
Inventor 许文来唐敏王璟简悦
Owner CHENGDU UNIVERSITY OF TECHNOLOGY