A Remediation System for Groundwater Contaminated by Ammonia Nitrogen-Inorganic Phosphorus

Abstract

The invention discloses a repair system of ammonia nitrogen-inorganic phosphorus composite polluted underground water. The repair system comprises an anaerobic tank, an anoxic tank, an aerobic tank, asedimentation tank and an adsorption tank which are sequentially arranged, wherein the hydraulic retention time ratio of the tanks is (1-2):(1-2):(1-2):(1-2):(1-2), and the volume ratio is (1-2):(1-2):(1-2):(1-2):(1-2). A filling frame is arranged in the anaerobic tank, and the filling frame is filled with a mixture of sawdust and scrap iron, wherein the mixture of the sawdust and the scrap ironaccounts for 10-15% of the effective volume of the anaerobic tank. According to the repair system, the removal rate of NH4<+>-N reaches 98.2-99.6%, the total nitrogen (TN) removal rate reaches 74.2-94.1%, the total phosphorus (TP) removal rate reaches 95.2-98.6%, the concentration of NH4<+>-N is less than 0.5 mg / L, the concentration of TP is less than 0.5 mg / L, and the defect of difficulty in reducing the phosphorus concentration of outflow water to 0.5 mg / L is solved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a repair system for ammonia nitrogen-inorganic phosphorus compound polluted groundwater. Background technique [0002] Worldwide, the extensive application of chemical fertilizers, the return of human and livestock manure and urine, unreasonable sewage irrigation, the wanton discharge of industrial wastewater and domestic sewage, the lateral recharge of polluted river water, the exploitation or over-exploitation of groundwater, and garbage seepage The infiltration of the filtrate has caused the groundwater to be generally polluted by ammonia nitrogen and inorganic phosphorus, and its pollution has become a worldwide environmental and health problem. According to reports, countries such as China, the United States, Germany, India, Australia, the United Kingdom, and South Korea have found high concentrations of ammonia nitrogen and inorganic phosphorus in groundwater. For...

AI Technical Summary

Problems solved by technology

Ammonia nitrogen and inorganic phosphorus in groundwater will cause a rapid decrease in the concentration of dissolved oxygen in the water, causing eutrophication, causing obvious toxicity and even death to aquatic organisms, and changing the chemical conditions of groundwater and microbial colony structure; at the same time, it will increase the number of water purification plants. The amount of disinfectant not only increases the cost per ton of water treatment, but also produces a large number of carcinogenic, teratogenic and mutagenic disinfection by-products, which pose a serious threat to human health

[0003] In domestic sewage and industrial wastewater treatment, A 2 O method, SBR method, oxidation ditch method and other traditional biological methods have been widely studied and widely used in the simultaneous removal of ammonia nitrogen and inorganic phosphorus, but the effect of simultaneous removal of ammonia nitrogen and inorganic phosphorus still needs to be improved

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