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The method of using otc to control the form of complex heavy metals in domestic waste composting

A technology for domestic waste and heavy metals, applied in fertilizer mixtures, applications, organic fertilizers, etc., can solve problems such as increasing the accumulation of heavy metals in plants and limiting the wide application of domestic waste composting.

Inactive Publication Date: 2018-01-23
重庆惟粮品农业开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, municipal solid waste composting has limited the wide application of domestic waste composting due to the promotion of plant growth and the enrichment of heavy metals in plants.

Method used

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  • The method of using otc to control the form of complex heavy metals in domestic waste composting
  • The method of using otc to control the form of complex heavy metals in domestic waste composting
  • The method of using otc to control the form of complex heavy metals in domestic waste composting

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A method using OTC to regulate the form of heavy metals in domestic waste composting: use a PVC pipe, Φ=3cm, h=25cm, seal the lower end with a layer of cotton cloth and nylon net, add 160g of compost to the pipe, add 40ml of 10-20mmol / kg aqueous solution And add it to the compost. During the experiment, the temperature was 19 ℃, and the relative humidity was 60%. Under the condition of natural light, the compost was replenished with water every day, and the water was added dropwise to prevent leakage during the water replenishment process. The outflow causes the loss of heavy metals. The water content was adjusted by weighing method to keep it constant, so that the water content in the compost matrix reached the maximum water holding capacity of 70%. After 45 days of aging, samples were taken to analyze the forms of heavy metals. The heavy metals mentioned therein refer to: Cd, Cr, Cu, Pb and Zn.

Embodiment 2

[0063] A method using OTC to regulate the form of heavy metals in domestic waste composting: use a PVC pipe, Φ=3cm, h=25cm, seal the lower end with a layer of cotton cloth and nylon net, add 160g of compost to the pipe, add 40ml of 10-20mmol / kg aqueous solution And add it to the compost. During the experiment, the temperature was 27 °C and the relative humidity was 72%. Under natural light, the compost was supplemented with water every day, and the water was added dropwise to prevent leakage during the process of supplementing water. loss of heavy metals. The water content was adjusted by weighing method to keep it constant, so that the water content in the compost matrix reached the maximum water holding capacity of 70%. After 45 days of aging, samples were taken to analyze the forms of heavy metals. The heavy metals mentioned therein refer to: Cd, Cr, Cu, Pb and Zn.

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Abstract

The invention discloses a method for regulating and controlling compound heavy metal forms of municipal refuse compost by adopting OTC (oxytetracycline). According to the method, a PVC (polyvinyl chloride) pipe, of which the diameter is equal to 3cm, the height is equal to 25cm, is adopted, and 160 g of compost is added into the pipe; 40ml of aqueous solution with the mass concentration of 10 to 20 mmol / kg is added into the compost, wherein the temperature is 19 to 27 DEG C, and the relative humidity is 60% to 72% during the test, and water is supplemented to the compost every day under a natural light condition. A weighing method is adopted for adjusting water content, so as to keep the constant of the water content and make the water content in compost substrate reach to the maximum water-holding capacity of 70%, after curing for 45 days, sampling is carried out to analyze the forms of heavy metal. Experimental results show that after adding the OTC, the ratios of the exchangeable forms of Cd, Cr, Cu, Pb and Zn to the bound form of carbonate are all remarkably increased. By adding the OTC, the bio-available forms of the heavy metal in the compost are increased, and the non-bio-available forms are reduced, and activation is realized for the heavy metal in the compost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for regulating the form of complex heavy metals in domestic waste composting by using oxytetracycline (OTC). Background technique [0002] Household garbage is a general term for the solid waste discharged in the daily life of urban people. Composting technology is mostly used in the treatment of urban household garbage in my country. Municipal solid waste compost contains phosphorus, nitrogen, potassium and organic matter and other nutrients needed for plant growth, and can be used as organic fertilizer in agriculture. The nutrients in the garbage compost can increase the organic matter content of the nutrients by 11.81%-72.12%. Studies have shown that the application of domestic waste compost can significantly increase the yield of Chinese cabbage. The study found that using domestic waste compost as a substrate to plant tea trees increased production b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F9/04C05G3/00
CPCY02A40/20
Inventor 赵树兰多立安齐帅
Owner 重庆惟粮品农业开发有限公司
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