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Dairy farm wastewater treatment system and treatment method

A wastewater treatment system and wastewater treatment technology, applied in the field of environmental engineering, can solve the problems of substandard nitrogen and phosphorus content in effluent, difficult wastewater treatment, poor treatment effect, etc., and achieve less excess sludge, good economic and environmental benefits. , the effect of reducing processing costs

Active Publication Date: 2016-06-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a method and a wastewater treatment system for treating wastewater from dairy farms using an anaerobic-AAO-aerated fluidized bed, which solves the problem of difficulty in treating wastewater from dairy farms, poor treatment effect, and low nitrogen and phosphorus content in the effluent. Standards and other issues

Method used

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  • Dairy farm wastewater treatment system and treatment method
  • Dairy farm wastewater treatment system and treatment method
  • Dairy farm wastewater treatment system and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The waste water is lifted into the regulating tank, and the high-concentration lift pump (flow rate 30m 3 / h, head 15.0m, power 3.0kW, equipped with liquid level gauge, flowmeter, blast stirring). The regulating tank adopts reinforced concrete structure, with an effective volume of 430m 3 , The hydraulic retention time is 34 hours.

[0050] The waste water is fed to the screw pump through the filter press (flow rate 5-51m 3 / h, head 120.0m, power 22.0kW, frequency conversion speed regulation) into the automatic box-type diaphragm filter press, the filter press model is XMZG200 / 1250, and the filtration area is 200m 2 , the volume of the filter chamber is 4m 3 , the moisture content of the filter cake is 65-75%, and the power is 5.5kW.

[0051] The first anaerobic tank, design parameters: L×W×H=12.5m×8.5m×12m, quantity 2 (parallel connection), total effective volume is 2400m 3 , the volume load is 3.125kgCOD / m 3 ·d, the reaction temperature is controlled at 30°C±1. ...

Embodiment 2

[0057] Example 2 Dairy Farm Wastewater Treatment

[0058] Apply the method of Embodiment 1 of the present invention to treat the wastewater from the Jinshan Dairy Farm of Shanghai Guangming Holstein Animal Husbandry Co., Ltd. The wastewater quality is shown in Table 1:

[0059] Table 1 Dairy farm wastewater quality

[0060]

[0061] The pretreated dairy farm wastewater enters the filter press through the feed pump for dehydration, and the mud cake is discharged; the filtrate further passes through the first anaerobic tank to remove organic matter; the anaerobic effluent further passes through the second anaerobic tank, anoxic tank, Aerobic tank, sedimentation tank, aerated biological fluidized bed, air flotation tank to remove nitrogen, phosphorus and remaining organic matter, in which part of the sludge in the sedimentation tank is returned to the second anaerobic tank, part of the sludge is discharged from the system, and the nitrification liquid in the aerobic tank Par...

Embodiment 3

[0075] Example 3 Dairy Farm Wastewater Treatment System

[0076] The dairy farm wastewater treatment system of the present invention is sequentially provided with: a regulating tank, a filter press device, a first anaerobic tank, a second anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, an aerated biological fluidized bed, Air flotation tank, sludge storage tank.

[0077] Wherein, an aeration device is provided in the regulating tank; a three-phase separator is provided on the upper part of the reactor of the first anaerobic tank, a gas collection pipe is provided on the top, a sludge discharge device is provided on the lower part, and a reactor is provided inside the reactor. Internal reflux pipeline; the filter press is an automatic box-type diaphragm filter press; the aerobic tank is connected to the anoxic tank through a sludge return system; the sedimentation tank is connected to the second anaerobic tank through a sludge return device ; The sedimenta...

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Abstract

The invention discloses a dairy farm wastewater treatment system and a treatment method and belongs to the technical field of environmental engineering. The dairy farm wastewater treatment method disclosed by the invention comprises the following steps: according to the characteristic that organic content and ammonia nitrogen content of dairy farm wastewater are relatively high, firstly removing SS in the wastewater by adopting a chamber type diaphragm filter press for reducing difficulty of subsequent biological treatment, carrying out anaerobic treatment, then carrying out an AAO (anaerobic-anoxic-oxic) process, then further introducing into an air floatation tank, and adding PAM and PAC before air floatation, so that phosphorus content is further reduced. The dairy farm wastewater treatment method disclosed by the invention has the advantages that an 'anaerobic treatment+AAO+aerated biological fluidized bed+air floatation tank' process has a good treatment effect, energy consumption is low, anaerobic methane also can be utilized as energy, and residual sludge is less in the method, so that residual sludge treatment cost is reduced; and meanwhile, project investment is low, operating cost is low, and operation management is simple and convenient.

Description

technical field [0001] The invention relates to a dairy farm wastewater treatment system and treatment method, belonging to the technical field of environmental engineering. Background technique [0002] With the improvement of people's living standards and the increase in the demand for dairy products, the amount of milk produced by the scattered dairy cows previously raised by residents can no longer meet people's requirements, so large-scale farming is increasing day by day. While large-scale farming brings huge social benefits, the harm it brings to the environment cannot be underestimated. The problem of environmental pollution has gradually attracted people's attention, so seeking an efficient and low-cost treatment method has become a key research direction. [0003] Dairy farm wastewater is mainly composed of urine, flushing water (including manure flushing water for pens, drinking trough flushing water, ground cleaning water, equipment and facility cleaning water, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20
CPCC02F1/001C02F1/24C02F1/52C02F3/121C02F3/1236C02F3/286C02F9/00C02F2103/20
Inventor 邹华朱荣韩秀茹
Owner JIANGNAN UNIV
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