Reactor and method for removing ammonia nitrogen in drinking water by virtue of enhanced filter and method thereof

A reactor, drinking water technology, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc. problems, to achieve the effect of facilitating biofilm growth, convenient operation and management, and ensuring safety

Active Publication Date: 2014-06-11
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of the conventional process, a biological filter is added to strengthen the removal of ammonia nitrogen by using microbial nitrification. However, the head loss of the biological filter is large and the area is large, which is difficult to realize in the transformation of the water plant; biological pretreatment can effectively remove ammonia nitrogen in water , but it is necessary to add pretreatment structures at the front end of t...

Method used

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  • Reactor and method for removing ammonia nitrogen in drinking water by virtue of enhanced filter and method thereof
  • Reactor and method for removing ammonia nitrogen in drinking water by virtue of enhanced filter and method thereof

Examples

Experimental program
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Embodiment 1

[0043] See figure 1 . 1. It includes the original water inlet area of ​​the sand filter, the original water distribution area of ​​the sand filter, the original filtration area of ​​the sand filter, the original support layer of the sand filter, the original water outlet area of ​​the sand filter, and The backwash system, the additional biological nitrification zone and the additional container of the aeration system constitute a reactor for strengthening the filter tank to remove ammonia nitrogen in drinking water. A water inlet pipe with a plurality of holes is arranged at the original water inlet area of ​​the sand filter tank on the upper part of the container constituting the reactor, so that the water inlet water is evenly distributed in all directions to form a water distribution area 1; A perforated bracket or perforated plate 3 mounted on the bearing 13 is installed on the top of the container located at the upper part of the water inlet pipe.

[0044] The added bio...

Embodiment 2

[0057] See figure 2 , the structure of the reactor for strengthening the filter to remove ammonia nitrogen in drinking water is basically the same as that of Example 1, except that the water outlet area above the water inlet pipe of the original water inlet area of ​​the sand filter is installed with overflow weir 2. The water outlet pipeline is changed to a water outlet pipeline installed on the container wall slightly below the middle of the biological nitrification zone where the biological filler is loaded.

[0058] The above-mentioned reactor for removing ammonia nitrogen from drinking water is used to treat the post-sink water of the water plant, and the ammonia nitrogen concentration in the post-sink water of the water plant is 1.0 mg / L. The treatment method is basically the same as in Example 1, except that the additional biological nitrification zone uses a Φ200mm polyamide elastic three-dimensional filler as the carrier for the growth of the microbial film. This bio...

Embodiment 3

[0062] The reactor for removing ammonia nitrogen in drinking water using the enhanced filter tank of Example 2 is used to treat the water after sinking in the water plant, and the ammonia nitrogen concentration in the sinking water in the water plant is 1.5 mg / L. The treatment method is basically the same as in Example 2, except that the additional biological nitrification zone is a combination of Φ150×60mm aldehyde cellulose fiber filler and aldehyde cellulose semi-soft fiber filler as the microbial film growth. The carrier of this kind of biological filler has a large surface area, which is conducive to the growth of microorganisms. The packing density of the biological filler is 44m / m 2 , the height is 1.0 ~ 1.2m. The filter material in the sand filter tank adopts the old quartz sand and anthracite used in the water plant (volume ratio is 1:1), the thickness of the filter material is 1m, and the particle size distribution is 0.8-1.2mm. The supporting layer is paved with l...

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Abstract

The invention relates to a reactor and a method for removing ammonia nitrogen in drinking water by virtue of an enhanced filter. The reactor is additionally provided with a biological nitrification region provided with a biological filler, and an aeration system under the circumstance that the previous water feed region, water distribution region, bearing layer and water discharge region of a sand filter are not changed; the added biological nitrification region and the previous filtering region of the sand filter are located in the same reactor and form a reaction region, the biological nitrification region is located above the previous filtering region of the sand filter, and an aeration head communicated with an air compressor of the aeration system by virtue of an air pipe is mounted under the biological filler. The reactor is capable of removing ammonia nitrogen and partial organic matters in water by virtue of enhanced nitrification of a microbial film grown on the surface of the biological filler and providing oxygen needed by organisms by virtue of aeration; in the filtering process, suspended particles, the microbial film and the like in water are intercepted, so that the biological safety is guaranteed and secondary pollution is prevented. The reactor and the method can be applied to purification treatment of drinking water such as an ammonia nitrogen polluted water source.

Description

technical field [0001] The invention belongs to the field of drinking water purification, and particularly relates to a reactor for removing ammonia nitrogen from drinking water by strengthening the filter tank based on a sand filter, and a method for removing ammonia nitrogen from drinking water by using the reactor. Background technique [0002] With the rapid development of my country's social economy, the amount of pollutant discharge has increased year by year, and the problem of water environment pollution has become prominent. Small cities and towns in my country mostly use surface water such as small and medium-sized rivers, lakes and reservoirs as drinking water sources. Affected by urban industrial wastewater, rural domestic sewage, domestic garbage, livestock and poultry breeding waste, and non-point source pollution of pesticides and fertilizers, urban and rural drinking water sources There are persistent or seasonal ammonia nitrogen exceeding the standard in many...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/16
Inventor 刘锐平刘峰刘会娟柏耀辉曲久辉
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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