Ecological restoration process for eutrophic water body
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A eutrophication and ecological restoration technology, applied in the direction of oxidized water/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve the problems of large maintenance, ineffective removal of ammonia nitrogen and phosphorus, and high operating costs
Inactive Publication Date: 2019-07-12
冷天华
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[0003] At present, most of the treatment of eutrophic water is directly treated by mechanical equipment plus chemical agents (COD treatment equipment), and the treated water is discharged. However, this method requires a large initial investment and high operating costs for the treatment of eutrophic water. The amount of maintenance is large (high-value COD treatment equipment must be purchased), the removal effect of ammonia nitrogen and phosphorus is not obvious, and the nutrients in the eutrophic water body have not been effectively used, which hinders the development of low-carbon economy and economy
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Embodiment 1
[0023] The water body of the already eutrophic lake, river or reservoir or the water body with low eutrophication (that is, the content of eutrophic substances in the water body is relatively low) is extracted.
[0024] Detect the water body, and according to the type and content of the substances in the water body, and the species of aquatic plants planted, carry out nutritional balance treatment on the water body, such as adding some trace elements for the growth of aquatic plants, etc.; or add dilution water to adjust some substances in the water body concentration.
[0025] After the balanced adjustment of water quality and nutrition is completed, the pH value (PH value) of the water body is detected again, and the pH value of the water body is adjusted so that the pH value of the water body is suitable for the growth of aquatic plants and aquatic animals.
[0026] After the above treatment, the water body meets the requirements. Plant aquatic plants floating on the liquid...
Embodiment 2
[0035] The high-concentration eutrophic water body is pretreated to reduce the concentration of organic pollutants in the eutrophic water body. Specifically, biochemical degradation treatment and advanced oxidation treatment can be used.
[0036] According to the type and corresponding content of organic pollutants in eutrophic water body, the biochemical degradation treatment can choose biogas fermentation and / or aerobic treatment and / or anaerobic treatment and / or hydrolytic acidification treatment, so that the eutrophic water body The concentration of organic pollutants is reduced, and at the same time, the ammonia, nitrogen, phosphorus, potassium and other substances in the eutrophic water body are retained to the greatest extent.
[0037] The eutrophic water body after biochemical treatment will be treated with airtight anoxic treatment, so that some bacteria will be killed by anoxic, because although most of the bacteria can be killed in the subsequent ozone treatment, som...
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Abstract
The invention discloses an ecological restoration process for a eutrophic water body. According to the characteristics of the eutrophic water body and concentrations of pollutants, the wastewater canbe pretreated by selectively using a biochemical and advanced oxidation process to ensure that the concentration of the organic pollutants in the wastewater is reduced to a certain range, at the sametime, the biochemical and advanced oxidation process plays the roles of disinfection and sterilization, then through an ecological chain formed by aquatic plants planted in a three-dimensional mannerand microorganisms and aquatic animals bred in a three-dimensional manner, further removal of the organic pollutants in the water body is completed, after the water body is purified to a certain degree, according to the specific conditions of water quality, the wastewater can be subjected to advanced treatment by using a secondary advanced oxidation treatment device to ensure standardized discharge or recycling of the wastewater, and finally the purpose of ecologically restorating the eutrophic water body is achieved; and in the whole treatment process, chemicals do not need to be added, the operating costs are low, the treatment efficiency is high, the utilization of land resources is high, and the aquatic product value is high.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to an ecological restoration process for eutrophic water bodies. Background technique [0002] Sewage, as the main pollutant in modern times, has caused a great impact on the environment. Most of the common pollution methods of sewage to the environment are eutrophication. Eutrophication is a phenomenon of water pollution caused by excessive plant nutrients such as ammonia nitrogen and phosphorus. . Under natural conditions, as the river entrains alluvium and the remains of aquatic organisms continue to settle and deposit on the bottom of the lake, the lake will transition from a flat nutrient lake to a eutrophic lake, and then evolve into a swamp and land. This is an extremely slow process. However, due to human activities, after a large amount of industrial wastewater, domestic sewage, and plant nutrients in farmland runoff are discharged into slow-flowing water bodies such as lak...
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