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Stabilization ponds are an effective way to implement the resource utilization of sewage in water-scarce and arid areas.
Therefore, the treatment of sewage in the stabilization ponds has become a new technology promoted in China in recent years
.
(1) The mechanism of sewage treatment in the stabilization pond
① The nature and distribution of sludge in the stabilization pond
.
Through the study of the amount and distribution of the deposited sludge, the depth distribution of the sludge in the stabilization pond increases with the increase of the sludge depth, and the total solids gradually increase, while the volatile solids gradually decrease
.
②The law of dissolved oxygen in the stable pond
.
Through the light and non-light contrast test, the algae photosynthetic oxygen production and atmospheric reoxygenation, calculated the proportion of each part in the total removal of organic matter in the stable pond, and the analysis and research determined that atmospheric reoxygenation is the stable oxygen transfer in the pond.
The main way
③The migration law of lead in the stable pond
.
The research on lead sedimentation shows that no matter what kind of pretreatment stabilization pond, the sedimentation effect of suspended particulate lead is the main effect of removing lead in sewage
.
④Inhibition law of algae in stable pond
.
In the algae cell growth inhibition test, a single toxicant test is generally used, and the combined effects of toxicants (antagonistic effect, additive effect and synergistic effect) have not been considered
.
⑤ Ecological analysis of the stable pond
.
The stabilization pond system is a relatively perfect ecosystem.
Starting from the principles of ecology and strengthening through engineering measures, urban sewage can be stabilized and harmless after primary treatment, and the purified water can be used for farmland irrigation.
(2) Process and improvement of stabilization pond
①Stabilization pond technology and mathematical model
.
Generally, a series process of primary sedimentation tank and stabilization pond is used in the design of sewage treatment.
The online measurement results of chromatography-mass spectrometry show that the hydrolysis tank can convert large molecules of refractory organic matter into small molecules, thereby accelerating the sewage in the subsequent stabilization pond.
When studying the design and operation of the stabilization pond, people have established a variety of digital models
.
Like other mathematical models of sewage treatment processes, the digital models of some wastewater stabilization ponds can reflect the internal connection of important factors including design parameters, and can abstractly describe the nature of the stabilization pond
.
②Improvement of the stability pond
.
AIPS new stabilization pond is an improvement of the traditional stabilization pond.
The technology has the advantages of low investment, low operating cost, easy management, and less land area than ordinary stabilization ponds
Related Links: Types and Functions of Stable Pond
