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Method for converting city sludge into plant products by utilizing pennisetum hydridum

A technology of urban sludge and royal bamboo grass, which is applied in botany equipment and methods, biological sludge treatment, application, etc., can solve the problems of high salt content in sludge, changes in sludge properties, and poisonous royal bamboo grass. Achieve obvious drying effect, high plant yield and considerable yield

Active Publication Date: 2013-11-13
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cultivation and utilization of the emperor bamboo grass is mainly based on the soil as the substrate, and there are few reports on the cultivation of the emperor bamboo grass with the sludge as the substrate. Whether the emperor bamboo grass can grow on the sludge , the output and quality of the sage, and whether the properties of the sludge itself will change after planting the sage, etc. have not been reported.
[0004] The inventors found that the direct cuttings of the stems of imperial bamboo grass or the root pocket ramets were transplanted on the fresh sludge. Due to the high water content in the fresh sludge and the anaerobic fermentation of the sludge, the organic acids and other substances produced were not conducive to the production of royal bamboo. Grass seedlings grow, and the salt content in the sludge is high, which has a certain poisonous effect on the root system of the emperor bamboo grass, making the growth of the emperor bamboo grass poor, and none of the direct cuttings of the emperor bamboo grass survived. Also only 16.67%

Method used

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  • Method for converting city sludge into plant products by utilizing pennisetum hydridum
  • Method for converting city sludge into plant products by utilizing pennisetum hydridum
  • Method for converting city sludge into plant products by utilizing pennisetum hydridum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, the undigested dewatered sludge from Datansha Sewage Treatment Plant in Guangzhou was used in the test. The content of heavy metal Cd exceeds the national A-level standard but is lower than the B-level standard (CJ / T 309-2009), which can be used for planting feed plants.

[0029] This embodiment adopts the following methods:

[0030] (1) Spread the sludge from urban sewage treatment plant, soil, mixed sludge directly mixed with sewage plant sludge, and plant-treated sludge on the ground with a thickness of 15cm.

[0031] (2) Select the thick and consistent old stems of Huangzhu grass, cut half of them obliquely into 2-node stems, dig out half of them with the roots, and divide the root pockets according to the same size, 8 plants per square meter.

[0032] (3) Cutting the stems of the royal bamboo grass directly into the sludge, one section is buried in the mud, and the other section is exposed to the mud surface, and the root pocket of the royal bamboo...

Embodiment 2

[0041] In this example, the undigested dewatered sludge from Datansha Sewage Treatment Plant in Guangzhou was used in the test. The content of heavy metal Cd exceeds the national A-level standard but is lower than the B-level standard (CJ / T 309-2009), which can be used for planting feed plants.

[0042] This embodiment adopts the following methods:

[0043] (1) Select the thick and consistent old stems of Huangzhu grass, cut them obliquely into 2 segments, and use the garden seedling substrate to grow seedlings in the substrate cup.

[0044] (2) Spread the sludge from the urban sewage plant directly on the ground with a thickness of 15cm.

[0045] (3) Two weeks after raising the seedlings of the royal bamboo grass, transplant the royal bamboo grass together with the substrate into the sludge, and plant the royal bamboo grass with the row spacing = 30×40cm.

[0046] (4) During the planting period, pour appropriate water according to the moisture content in the sludge.

[0047...

Embodiment 3

[0057] In this example, the undigested dewatered sludge from Datansha Sewage Treatment Plant in Guangzhou was used in the test. The specific method is as follows:

[0058] (1) Select the thick and consistent old stems of Huangzhu grass, cut them obliquely into 2 stem segments, 4 plants per square meter.

[0059] (2) Fill the sludge from the urban sewage plant directly into the ditch with a depth of 30 cm and a width of 25 cm, and plant imperial bamboo grass on the side of the ditch.

[0060] (3) Cut the stem section of the imperial bamboo directly into the soil, one section is buried in the soil, and the other section is exposed to the ground.

[0061] (4) During the planting period, pour appropriate water according to the moisture content in the sludge.

[0062] (5) Mow the emperor bamboo grass once every two months, and leave two sections for each cut to allow it to continue to grow.

[0063] The specifications of the test sludge ditch are length × width × depth = 200cm ×...

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Abstract

The invention relates to the agriculture resource utilization for city sludge, in particular to a method for converting city sludge into plant products by utilizing pennisetum hydridum. The method comprises the steps of planting the pennisetum hydridum adopting buffering and protective measures into the city sludge, for example utilizing a seedling substrate to perform seedling on the pennisetum hydridum, and then transplanting the pennisetum hydridum together with the seedling substrate into the city sludge, or filling the city sludge into a sludge gutter, and then cutting the pennisetum hydridum into soil at two sides of the sludge gutter. By adopting the method, the survival rate of the pennisetum hydridum achieves more than 66.67%, the pennisetum hydridum with the dry weight of 5.16t can be harvested per mu in one year, the processed sludge is about 100-200t, the contents of heavy metals of Cu, Zn, Pb and Cd in the pennisetum hydridum are consistent with national feed hygiene standard, the pennisetum hydridum can be used as feedstuff, the content of K in the pennisetum hydridum is 5% in dry weight, the total content of N, P2O5 and K2O in the pennisetum hydridum is 9% in dry weight, and the method can be used for preparing organic K fertilizer.

Description

technical field [0001] The present invention relates to urban sludge agricultural resource utilization, specifically, relates to a kind of utilization imperial bamboo grass ( Pennisetum hydridum ) Process for converting municipal sludge into plant products. Background technique [0002] With the development of the economy and the acceleration of the urbanization process, the sewage treatment rate in our country is increasing day by day, and the output of municipal sludge, as an inevitable subsidiary product of sewage treatment, is also increasing day by day. It is estimated that my country's sewage treatment rate will exceed 80% at the end of the "Twelfth Five-Year Plan", when the number of urban sewage treatment plants will reach more than 2,500, correspondingly, the output of residual sludge will increase sharply. The amount of urban sludge is huge and growing rapidly. Its safe and reasonable treatment and disposal is one of the problems that need to be solved urgently in...

Claims

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Application Information

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IPC IPC(8): A01G1/00C02F11/02
Inventor 吴启堂林晓燕黎华寿卫泽斌王浩王慧
Owner SOUTH CHINA AGRI UNIV
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