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Integrated treatment method of heavy metal passivation and nutrient nitrogen and phosphorus recovery for domestic animal sewage

A treatment method, technology of livestock and poultry manure, applied in the field of agricultural resources and the environment, can solve the problems such as the difficulty of harmless heavy metals and the difficulty of recycling nutrients, nitrogen and phosphorus, and achieve the effect of efficient recycling

Active Publication Date: 2017-10-27
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technical solution described by this patent allows for quick and effective treatments on animal wastewater that contains harmful substances like metal elements or other chemicals without causing environmental concerns. It involves integrating these methods together through various technologies including irrigators, filters, filtrers, bioreactors, electrodes, hydrostatic pressure devices, microwave generators, and others. Overall, it offers improved efficiency and safety during processing operations while minimizing negative impacting human health issues associated therewith.

Problems solved by technology

This patent discusses various ways to efficiently remedy or prevent excess accumulation of certain types of mineral nutritional sources like zinc sulfides, copper, selenium, manganese, magnesia, calcium, boron, ammoniophosilane, triphenolamidones, pyridines, carboxymethanes, citric acid saliners, cyclohexadienostats, dihydroxypropyltoluensulfonic Acidiors(DPMAS). These compounds help dissolved oxygen and phytotaxis reactions within the body, while reducing sediments formed during decomposition processes. They provide effective separation without causing damage to beneficial bacteriums and unnatural plant communities.

Method used

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  • Integrated treatment method of heavy metal passivation and nutrient nitrogen and phosphorus recovery for domestic animal sewage

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Effect test

Embodiment 1

[0066] Control the solid content of livestock and poultry manure at 3%, adjust the pH value to 8, add helicase (5mg / L) to the storage tank, and react at a constant temperature of 30°C for 5h; then introduce water curtain ionization through the water inlet pump at 1m / h Irradiation treatment reactor, controlled irradiation amount 5kGy, irradiation time 2min, ionizing irradiation equipment selects electron accelerator as irradiation source (energy constant 0.5MeV, power 40kw, beam current 10mA); then introduce homogeneous pool, use 5mol / L NaOH solution to adjust the pH value to 8.

[0067] At a flow rate of 0.5m / h, the treated livestock and poultry manure is introduced into the micro-electrolysis reactor (bottom-mounted tube aeration device, aperture 30mm) to a volume ratio of 1:3, and the continuous process is carried out under the condition of a blast rate of 70L / min. Iron-carbon micro-electrolysis fluidized bed reaction (residence time 60min, iron-carbon ratio 1:1, solid-liqu...

Embodiment 2

[0074] Control the solid content of livestock and poultry manure at 50%, adjust the pH value to 7, add helicase (10mg / L) to the storage tank, and react at a constant temperature of 40°C for 10h; Ionizing radiation treatment reactor, controlled radiation amount 10kGy, radiation time 5min, ionizing radiation equipment selects electron accelerator as radiation source (constant energy 1.0MeV, power 100kw, beam current 15mA); 10mol / L citric acid adjusts the pH value to 4.

[0075] At a flow rate of 0.1m / h, the treated livestock and poultry manure is introduced into the micro-electrolysis reactor (bottom-mounted tube aeration device, aperture 40mm) to a volume ratio of 2:3, and the continuous process is carried out under the condition of a blast rate of 50L / min. Iron-carbon micro-electrolysis fluidized bed reaction (residence time 120min, iron-carbon ratio 2:1, solid-liquid ratio of iron-carbon filler to liquid 1:10), start the internal circulation system at regular intervals (contr...

Embodiment 3

[0082] Control the solid content of livestock and poultry manure at 25%, adjust the pH value to 6, add helicase (3mg / L) to the storage tank, and react at a constant temperature of 35°C for 2h; Ionizing radiation treatment reactor, controlled radiation amount 1kGy, radiation time 10min, ionizing radiation equipment selects electron accelerator as radiation source (constant energy 1.0MeV, power 100kw, beam current 20mA); 10mol / L NaOH solution to adjust the pH value to 8.

[0083] At a flow rate of 0.3m / h, the treated livestock and poultry manure is introduced into the micro-electrolysis reactor (bottom-mounted tube aeration device, aperture 20mm) to a volume ratio of 1:3, and the continuous process is carried out under the condition of a blast rate of 60L / min. Iron-carbon micro-electrolysis fluidized bed reaction (residence time 120min, iron-carbon ratio 1:1, solid-liquid ratio of iron-carbon filler to liquid 1:5), start the internal circulation system at regular intervals (cont...

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Abstract

The invention provides an integrated treatment method of heavy metal passivation and nutrient nitrogen and phosphorus recovery for domestic animal sewage. Heavy metal element passivation and activation and release of nutrients nitrogen and phosphorus are achieved by adopting an integration technology of ionizing irradiation/iron-carbon micro-electrolysis fluidized bed, and efficient recovery of the nutrients nitrogen and phosphorus is achieved by adopting an integration technology of disc tube reverse osmosis/struvite crystal/hydrated molten iron oxide-carrying hot carbon. The copper-zinc-lead-chromium passivation rate is greater than 90%, the nitrogen element recovery rate is greater than 90% and the phosphorus element recovery rate is greater than 95%.

Description

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Claims

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Application Information

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Owner CHINA AGRI UNIV
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