Slow-released carbon source biochemical-denitrifying treatment device for swine wastewater with high ammonia nitrogen and low carbon nitrogen ratio as well as method for treating swine wastewater

A technology with low carbon-to-nitrogen ratio and slow-release carbon source, which is applied in animal husbandry wastewater treatment, aerobic and anaerobic process treatment, etc., can solve the problems of high operating cost, complicated process, poor denitrification effect, etc., and achieve project saving Investment and operating costs, strengthening short-range nitrification, and improving the effect of total nitrogen removal rate

Inactive Publication Date: 2015-05-06
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The present invention aims to solve the problem that the prior art for pig raising wastewater with a C/N ratio of only about 1, the existing denitrification treatment technology is not perfect, there are complex processes, large capital investment, poor denitrification effect, and th

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  • Slow-released carbon source biochemical-denitrifying treatment device for swine wastewater with high ammonia nitrogen and low carbon nitrogen ratio as well as method for treating swine wastewater

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine figure 1 , This embodiment is a biochemical denitrification treatment device with high ammonia nitrogen and low carbon nitrogen ratio for pig raising wastewater, which consists of a water inlet tank 1, an inlet pump 2, an outlet overflow pool 7, an outlet water tank 8, a mud discharge port 10, Rotten wood filler layer 11, dissolved oxygen detection probe 13, nitrification liquid return pump 14, dissolved oxygen online detection display screen 15, air aeration pump 16, flow meter 17, aeration head 18, support plate for the first anoxic reaction zone 19. Supporting plate 20 for the second anoxic reaction zone, supporting plate 21 for the third anoxic reaction zone, supporting plate 22 for the aerobic reaction zone, baffle plate 23 for the first anoxic reaction zone, and baffle plate for the second anoxic reaction zone Plate 24, the third anoxic reaction zone baffle 25, an aerobic reaction zone baffle 26 and a slow-release carbon s...

specific Embodiment approach 2

[0046] Embodiment 2: The difference between this embodiment and Embodiment 1 is that a 5cm thick pebble layer 12 is provided between the support plate 22 in the aerobic reaction zone and the rotting wood filler layer 11 . Others are the same as in the first embodiment.

[0047] The function of the cobblestone layer 12 in this specific embodiment is to make the distribution of water and air more uniform.

specific Embodiment approach 3

[0048] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the particle size of the cobblestone layer 12 is 0.5 cm to 1.5 cm. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a slow-released carbon source biochemical-denitrifying treatment device for swine wastewater with high ammonia nitrogen and a low carbon nitrogen ratio as well as a method for treating swine wastewater and relates to the technical field of breeding wastewater treatment. The method disclosed by the invention solves the problem in the prior art that for swine wastewater in which the C/N value is only about 1, the process is complicated, the denitrifying effect is poor, the carbon source and the alkalinity need to be supplemented, the energy consumption is high and the operating cost is high. The device consists of a water inlet box, a water inlet pump, a water outlet overflow pool, a water outlet tank, a mud disposal opening, a rotten wood filler layer, a dissolved oxygen detection probe, a nitrification liquor return pump, a dissolved oxygen online detection display screen, an air aerating pump, a flowmeter, an aerating head and a slow-released carbon source bio-denitrifying treatment pool for swine wastewater with high ammonia nitrogen and the low carbon nitrogen ratio. The method comprises the following steps: feeding the wastewater to a first anoxic reaction region guide channel; and controlling a nitrifying liquor reflux ratio, a hydraulic retention time, temperature and dissolved oxygen. The invention relates to the slow-released carbon source bio-denitrifying treatment device for swine wastewater with high ammonia nitrogen and the low carbon nitrogen ratio as well as the method for treating swine wastewater.

Description

technical field [0001] The invention relates to the technical field of aquaculture wastewater treatment. Background technique [0002] Pig farm wastewater mainly includes pig feces and pig house flushing wastewater, which is a kind of high ammonia nitrogen organic wastewater. There are currently three main methods of manure cleaning in pig farms: dry manure, water flushing manure and water soaking manure (self-flowing) . Large-scale pig farms in my country mainly use dry manure. In the dry cleaning manure farming mode, pig manure is collected, cleaned, concentrated and transported away mechanically or manually, while urine and sewage flow out from the sewer for centralized post-processing. Dry-cleaning pig wastewater is a typical low C / N ratio (about 1) organic wastewater, and its wastewater is mainly composed of pig urine, NH 4 + -N and TN content is high. [0003] In biochemical treatment, it is generally believed that only when the C / N ratio is greater than 4-6 can t...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F103/20
Inventor 李建政谢荣孟佳李玖龄
Owner HARBIN INST OF TECH
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