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Livestock/poultry breeding wastewater resource utilization and regeneration recycling method

A technology for livestock and poultry breeding wastewater and resources, which is applied in the field of resource utilization and recycling of livestock and poultry breeding wastewater, can solve the problems of low nitrogen and phosphorus removal rates, insufficient recycling, high operating costs, etc., and achieve resource utilization The effect of high degree, meeting the water quality requirements for recycling, and reducing the cost of wastewater treatment

Inactive Publication Date: 2013-09-11
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Judging from the existing treatment technology and process, there are some shortcomings as follows: 1. Most of them adopt anaerobic primary treatment, which reduces most of COD, but the removal rate of nitrogen and phosphorus is not very high
2. Nitrogen and phosphorus resources cannot be fully recycled, and it is easy to cause eutrophication when discharged into water bodies
3. The investment required to build this type of manure treatment facility is too large and the operating cost is too high

Method used

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  • Livestock/poultry breeding wastewater resource utilization and regeneration recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] refer to figure 1 , 500 tons / day livestock and poultry breeding waste water resource utilization and waste water regeneration recycling method.

[0050] The water quality indicators of the livestock and poultry breeding wastewater were determined as shown in Table 1.

[0051] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 5000 5 Ammonia nitrogen mg / L 1000 2 SS mg / L 20000 6 Fecal coliforms pcs / L 2.5×10 7 3 BOD 5 mg / L 2900 7 roundworm eggs pcs / L 15000 4 Total Phosphorus mg / L 150

[0052] (1) Anaerobic digestion to produce biogas

[0053] The livestock and poultry breeding wastewater is collected through pipelines and then discharged into the anaerobic pool 1. The organic matter is decomposed into methane and carbon dioxide (the main components of biogas) under the combined action of anaerobic and facultative bacteria adsorpti...

Embodiment 2

[0073] refer to figure 1 , 1200 tons / day livestock and poultry breeding waste water resource utilization and waste water regeneration recycling method.

[0074] The water quality indicators of the livestock and poultry breeding wastewater were determined as shown in Table 6.

[0075] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 13000 5 Ammonia nitrogen mg / L 1000 2 SS mg / L 16500 6 Fecal coliforms pcs / L 2×10 7 3 BOD 5 mg / L 4500 7 roundworm eggs pcs / L 12000 4 Total Phosphorus mg / L 180

[0076](1) Anaerobic digestion to produce biogas

[0077] The livestock and poultry breeding wastewater is collected through pipelines and then discharged into the anaerobic pool 1. The organic matter is decomposed into methane and carbon dioxide under the combined action of anaerobic and facultative bacteria adsorption, fermentation, and methanogeni...

Embodiment 3

[0096] refer to figure 2 , 2000 tons / day livestock and poultry breeding wastewater resources utilization and wastewater regeneration recycling method.

[0097] The water quality indicators of the livestock and poultry breeding wastewater were determined as shown in Table 11.

[0098] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 7500 5 Ammonia nitrogen mg / L 600 2 SS mg / L 17000 6 Fecal coliforms pcs / L 3×10 7 3 BOD 5 mg / L 3900 7 roundworm eggs pcs / L 10000 4 Total Phosphorus mg / L 110

[0099] (1) Anaerobic digestion to produce biogas

[0100] The livestock and poultry breeding wastewater is collected through pipelines and then discharged into the anaerobic pool 1. The organic matter is decomposed into methane and carbon dioxide under the combined action of anaerobic and facultative bacteria adsorption, fermentation, and methanogeni...

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Abstract

The invention discloses a livestock / poultry breeding wastewater resource utilization and regeneration recycling method which comprises the following steps of: (1) anaerobic digestion to produce biogas; (2) slag removal; (3) ammonia nitrogen removal; (4) biochemical treatment on a biological aerated filter (BAF); (5) disinfection; and (6) preparation of organic fertilizer. By combining the anaerobic technology, the denitrification technology, the BAF technology and the disinfection technology and adopting the livestock / poultry breeding wastewater as a resource, the method disclosed by the invention performs anaerobic fermentation treatment on the wastewater to produce biogas; the wastewater after the biogas production is subjected to solid-liquid separation; the solid slag is used as a raw material for producing organic fertilizer; the wastewater after the production of organic fertilizer is treated by the BAF technology and disinfected before recycling and up-to-standard emission; and the device realizes good treatment effect, low energy consumption and comprehensive utilization of resources while bringing economic benefits.

Description

technical field [0001] The present invention relates to a resource utilization and recycling method for livestock and poultry breeding wastewater, in particular to a comprehensive utilization of livestock and poultry breeding wastewater resources and wastewater regeneration and recycling based on anaerobic technology, denitrification technology, BAF technology and disinfection technology The method, especially using livestock and poultry breeding wastewater as a resource, processes it through anaerobic fermentation to produce biogas, the wastewater after producing biogas is then separated from solid and liquid, and the solid slag is used as a raw material for the production of organic fertilizers to produce organic fertilizers, wastewater After BAF technology and disinfection, it can be recycled and discharged up to standard, which belongs to the field of water pollution control of environmental engineering. Background technique [0002] Wastewater from livestock and poultry...

Claims

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Application Information

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IPC IPC(8): C02F9/14C10L3/08C05F7/00C05F15/00C02F103/20
CPCY02A40/20Y02E50/30Y02W30/40
Inventor 张世文徐琛林锦松许雅玲李丹
Owner BOYING XIAMEN SCI & TECH
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