Method for treating rural domestic sewage by using chlorella pyrenoidosa

A technology of Chlorella pyrenoidosa and domestic sewage, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor removal of pollutants and reduce pollution control. Cost, easy to cultivate, no secondary pollution effect

Inactive Publication Date: 2021-08-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the existing method of using algae ponds to treat rural sewage has poor removal effect on pollutants, and provides a method for using chlorella pyrenoidum to treat rural domestic sewage

Method used

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  • Method for treating rural domestic sewage by using chlorella pyrenoidosa
  • Method for treating rural domestic sewage by using chlorella pyrenoidosa
  • Method for treating rural domestic sewage by using chlorella pyrenoidosa

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Embodiment 1

[0028] Embodiment 1: The method of utilizing Chlorella pyrenoidosa to process rural domestic sewage of the present embodiment is carried out according to the following steps:

[0029] 1. Cultivation of Chlorella pyrenoidosa: Add 20mL of BG11 culture medium to the Erlenmeyer culture flask, then add 10mL of Chlorella pyrenoidosa liquid under sterile conditions, mix well, and put the Erlenmeyer culture flask at a temperature of 25 ±1℃, light intensity is 100μmol / (m 2 Cultivate under the condition of s) for 25 days to obtain the primary culture algae liquid; shake the Erlenmeyer flask three times a day during the culture period, each shaking for 30 to 40 seconds, so that the light on the algae liquid is even and reduce the deposition of microalgae; Add the primary culture algae liquid and 150mL of BG11 medium into the Erlenmeyer culture flask and mix them. 2 Cultivate under the condition of s) for 20 days to carry out secondary expansion cultivation to obtain the secondary cultur...

Embodiment 2

[0039]Embodiment 2: The difference between this embodiment and embodiment 1 is that the aeration rate in step 3 is 0.3 L / min, and the others are the same as embodiment 1.

Embodiment 3

[0040] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the aeration rate in step 3 is 0.9 L / min, and the others are the same as Embodiment 1.

[0041] During the processing of Examples 1 to 3, the changes of COD in the rural domestic sewage with the processing time are as follows: figure 2 shown, from figure 2 It can be seen that in the initial stage of the reaction, the COD content of the effluent decreased rapidly. On the third day, the COD contents of the effluent of the three reactors were 61.57mg / L, 56.04mg / L and 73.3mg / L, respectively, and the removal rates were 58.96% , 62.28% and 51.39%. It can be clearly seen that when the aeration intensity is 0.9L / min, the removal effect of COD in the effluent is the worst. On the ninth day, the COD content in the effluent is 51.28mg / L, and the removal rate is 65.99% %; when the aeration intensity was 0.6L / min, the removal effect of COD in the effluent was the best, and the COD content in the effluen...

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Abstract

The invention discloses a method for treating rural domestic sewage by using chlorella pyrenoidosa, and relates to a treatment method of rural domestic sewage. The method aims at solving the technical problem that an existing method for treating rural sewage by utilizing an algae pond is poor in pollutant removal effect. The method comprises the following steps: 1, culturing chlorella pyrenoidosa; 2, domesticating the chlorella pyrenoidosa; and 3, inoculating the secondary domesticated algae liquid into the rural domestic sewage with the algae concentration of 105-106 cell / mL, and treating for 8-10 days under the conditions of the temperature of 25 + / -1 DEG C, the illumination intensity of 100 [mu] mol / (m<2>.S) and aeration to complete the treatment of the rural domestic sewage. According to the invention, the rural domestic sewage is treated by taking photosynthesis of chlorella pyrenoidosa as a main carrier, and the effluent quality meets the first-grade B discharge standard of sewage. The method can be used in the field of rural domestic sewage treatment.

Description

technical field [0001] The invention relates to a treatment method for domestic sewage in rural areas. [0002] technical background [0003] Strengthening the collection, treatment and resource utilization of rural domestic sewage is an urgent problem to be solved in improving the rural water environment, and it is also an important part of the rural revitalization strategy. However, the coverage of rural domestic sewage treatment facilities in my country is seriously insufficient. In 2020, the national rural domestic sewage treatment rate is only 26%. The rural domestic sewage problem has become an important factor affecting the rural living environment and ecological environment. [0004] Rural water is mostly domestic water, mainly including kitchen sewage, toilet sewage and washing sewage, and the three are called "three rural waters". The rural domestic sewage is characterized by small water volume and large time-varying coefficient. Compared with urban sewage, the to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F101/16
CPCC02F3/322C02F2101/16C02F2101/166C02F2101/163
Inventor 臧爽李泓姗陈楚楚熊梦智包金刚刘双
Owner HARBIN INST OF TECH
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