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Livestock and poultry breeding wastewater CC-HBDP treatment process

A technology of livestock and poultry breeding wastewater and treatment process, which is applied in the fields of animal husbandry wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., and can solve the problem of influent COD not being too high.

Active Publication Date: 2020-10-23
FUJIAN HAIXIA ENVIRONMENTAL PROTECTION GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the influent COD of these processes should not be too high, otherwise it will inhibit the activity of autotrophic microorganisms such as anammox bacteria.

Method used

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  • Livestock and poultry breeding wastewater CC-HBDP treatment process
  • Livestock and poultry breeding wastewater CC-HBDP treatment process
  • Livestock and poultry breeding wastewater CC-HBDP treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The coagulant in the coagulation tank in step (1) is polyaluminum chloride, the dosage is 50 mg / L, the stirring speed is 50 r / min, and the residence time is 5 min; by controlling the dosage of the coagulant , so that the C / N ratio of the sewage entering the mixed denitrification tank is 1:1.

[0028] In this example, the hydraulic retention time in the clarifier in step (2) is 1 h, and the pore size of the first solid-liquid separation device is 25 μm; the captured carbon source is discharged through the vent valve 8 below the clarifier 5 for collection.

[0029] In this embodiment, in step (3), the dissolved oxygen in the mixed denitrification tank is controlled at 0.2 mg / L and the pH is controlled at 7.8 by controlling the aeration rate of the aeration device 10; Type packing 11, braid type packing 11 density is to hang 50 per square meter.

Embodiment 2

[0030] Example 2: Polyaluminum chloride is selected as the coagulant in the coagulation tank in step (1), the dosage is 400 mg / L, the stirring speed is 300 r / min, and the residence time is 20 min; by controlling the dosage of the coagulant , so that the C / N ratio of the sewage entering the mixed denitrification tank is 3:1.

[0031] In this example, the hydraulic retention time in the clarifier in step (2) is 3 h, and the pore size of the first solid-liquid separation equipment is 150 μm; the captured carbon source is discharged through the vent valve 8 below the clarifier 5 for collection.

[0032] In this embodiment, in step (3), the dissolved oxygen in the mixed denitrification tank is controlled at 0.5 mg / L and the pH is controlled at 8.2 by controlling the aeration rate of the aeration device 10; Type packing 11, braid type packing 11 density is to hang 100 per square meter.

Embodiment 3

[0033] Example 3: Polyaluminum chloride is selected as the coagulant in the coagulation tank in step (1), the dosage is 200 mg / L, the stirring speed is 300 r / min, and the residence time is 5 min; by controlling the coagulant dosing amount, so that the C / N ratio of the sewage entering the mixed denitrification tank is 2:1.

[0034] In this example, the hydraulic retention time in the clarifier in step (2) is 3 h, and the pore size of the first solid-liquid separation equipment is 70 μm; the captured carbon source is discharged through the vent valve 8 below the clarifier 5 for collection.

[0035]In this embodiment, in step (3), the dissolved oxygen in the mixed denitrification tank is controlled at 0.2 mg / L and the pH is controlled at 8.0 by controlling the aeration rate of the aeration device 10; Type packing 11, braid type packing 11 density is to hang 70 per square meter.

[0036] The influent COD concentration of livestock and poultry breeding wastewater in a rural area i...

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Abstract

The invention relates to a livestock and poultry breeding wastewater CC-HBDP treatment process, which comprises the following steps of: (1) feeding livestock and poultry breeding wastewater into a coagulating basin, adding a coagulant and performing stirring to generate flocs, and then feeding the mixed solution into a clarification basin; (2) conducting gravity precipitation on a large amount offlocs in the clarification basin, subjecting large-particle organic matters to net capture sweeping to form a particle floating bed, enabling the mixed solution to pass through the particle floating bed in an up-flow mode, then intercepting the flocs with low density by first solid-liquid separation equipment, and letting the separated supernatant with a low carbon-nitrogen ratio enter a mixed denitrification basin; and (3) ammonifying organic nitrogen in the mixed denitrification baisn, converting part of ammonia nitrogen into nitrite nitrogen, converting the nitrite nitrogen and residual ammonia nitrogen into nitrogen and nitrate nitrogen, converting the nitrate nitrogen and part of organic matters into nitrogen, thus finally realizing synergistic efficient denitrification, and discharging the treated water after passing through second solid-liquid separation equipment. The synergistic effect of autotrophic bacteria nitrogen removal and heterotrophic bacteria denitrification has theadvantages of high nitrogen removal efficiency, low energy consumption and low sludge yield.

Description

technical field [0001] The invention relates to a CC-HBDP treatment process for livestock and poultry breeding wastewater, which belongs to the field of sewage treatment and resource utilization. Background technique [0002] With the popularization of industrial wastewater treatment facilities and the improvement of technical level in my country, the total discharge of industrial wastewater pollution has been effectively controlled. On the contrary, the proportion of agricultural non-point source pollution to the total discharge of pollutants has been rising. One of the main sources of pollution is livestock. Various types of wastewater discharged during poultry farming. Livestock and poultry breeding wastewater has the characteristics of high organic matter and high ammonia nitrogen. Its unreasonable discharge not only affects the cleanliness and sensory comfort of the environment, but also causes pollution of rivers, lakes and groundwater, leading to the deterioration of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20
CPCC02F9/00C02F1/5281C02F1/5245C02F2001/007C02F1/001C02F3/307C02F3/34C02F2203/006C02F2303/06C02F2103/20C02F2303/14C02F2301/08Y02W10/10
Inventor 张莉敏陈美香王志伟林哲冠陈凤林志龙陈超杨连潭林航于成志
Owner FUJIAN HAIXIA ENVIRONMENTAL PROTECTION GRP
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