A method for combined restoration of wastewater and acidic soil
A combined restoration and acidic soil technology, applied in chemical instruments and methods, energy wastewater treatment, biological water/sewage treatment, etc., can solve the problems of effective surface soil, secondary pollution, high cost, etc., to improve soil fertility and water quality , No need for chemicals
Active Publication Date: 2019-10-29
ZHEJIANG UNIV
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Problems solved by technology
However, the application of lime has problems such as high cost, slow effect and only effective on surface soil
There are currently no satisfactory methods and techniques for correcting soil acidity
On the other hand, due to the large amount of wastewater produced by production and life in the world, the current method of treating wastewater requires expensive equipment, materials and energy, and produces a large amount of toxic sediment during the treatment process, causing secondary pollution. Therefore, wastewater treatment faces technical challenges
Method used
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[0013] In this example, a combined restoration method is used to restore pig raising wastewater (wastewater generated during pig production) and acidic soil.
[0014] (1) Preparation of compound bacterial agent: Take 5mL of waste water and add them to 100mL of Van Niel purple non-sulfur bacteria enrichment medium, inorganic salt medium, beef extract peptone medium, containing high concentration (>500mg / L) ammonium state In the medium of nitrogen, spread evenly with a coating rod, and place the culture dish upside down at 25-35°C for 24-48h at a constant temperature. Pick the central part of the largest single colony from the above-mentioned different medium plates, streak and purify it on the nutrient agar plate, and transfer it to the nutrient agar slant with 5% inoculation amount respectively after reaching pure species , cultured at 25-35°C for 24-48h, and then added 2-6% inoculum amount of each bacterial strain into sterilized waste water for expansion and cultivation to p...
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The invention provides a waste water and acid soil combined remediation method. The waste water and acid soil combined remediation method comprises the specific steps as follows: (1) alga and bacteria culture: to-be-treated waste water in a container is inoculated with alga strains and compound bacteria and cultured under greenhouse conditions with sun illumination until pH of the water in the container reaches 10 or higher, wherein the inoculation size of the alga strains is initial OD680 being 0.05-0.07, and the inoculation size of the compound bacteria is 10 ml per liter of the waste water; (2) soil irrigation: the water treated with alga and the bacteria culture is used for irrigating the acid soil, and the pH of the soil can reach 6 or higher. The waste water and the acid soil can be remediated simultaneously with the method, and the remediation quality is satisfactory. Compared with the conventional methods for remediating the waste water and the acid soil independently, the method has the advantages that investment is low, output is high, chemicals are not needed, precipitates are not produced, and the continuity and the quality are high.
Description
technical field [0001] The invention belongs to the field of wastewater and soil ecological restoration, in particular to a method for combined restoration of wastewater and acidic soil. Background technique [0002] Acidity limits crop productivity on nearly half of the world's arable land, and the main method of correcting soil acidity has long been liming. However, the application of lime has problems such as high cost, slow effect and effective only on surface soil. There are currently no satisfactory methods and techniques for correcting soil acidity. On the other hand, due to the large amount of wastewater produced by production and life in the world, the current method of treating wastewater requires expensive equipment, materials and energy, and produces a large amount of toxic sediment during the treatment process, causing secondary pollution. Therefore, wastewater treatment faces technical challenges. For example, in my country, 6 billion tons of pig wastewater ...
Claims
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IPC IPC(8): B09C1/08C02F3/32C02F3/34
CPCB09C1/08B09C2101/00C02F3/325C02F3/341Y02W10/37
Inventor 周启发吴雪玲晟琪璐徐礼根
Owner ZHEJIANG UNIV