Enhanced phosphorus removal combined artificial wetland system utilizing rural biogas digester

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to an enhanced phosphorus removal combined artificial wetland system utilizing a rural biogas digester, the system comprises a water distribution channel unit, a biogas digester unit and a water collection channel unit which are connected in sequence, the water distribution channel unit comprises a water distribution channel, and an aeration system is arranged at the bottom of the water distribution channel; and a filler fixing plate is fixedly arranged above the aeration system and located in the water distribution channel, iron-carbon micro-electrolysis filler is arranged on the filler fixing plate, a first planting foam plate is arranged in the water distribution channel and located above the iron-carbon micro-electrolysis filler, a water inlet channel is formed in one side of the top of the water distribution channel, and the other side of the top of the water distribution channel is connected with a biogas digester unit through a first water passing channel. The biogas digester unit comprises a biogas digester, a planting layer, a filler layer and a pebble layer are arranged in the biogas digester from top to bottom, and the pebble layer is connected with the water collecting channel unit through a second water passing channel. The phosphorus removal efficiency of the constructed wetland is improved by combining the technical means of physical, chemical and biological combined phosphorus removal.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a combined artificial wetland system for strengthening dephosphorization by using rural methane pools. Background technique [0002] Constructed wetland is an ecosystem that simulates natural wetland by artificially configuring substrates, plants and microorganisms. This system constructs a sewage treatment technology that couples physical and chemical effects. Constructed wetland has the advantages of simple process, low construction and operation costs, strong decontamination ability, and long service life. It is especially suitable for treating scattered or small-scale sewage. It has been widely used in rural domestic sewage treatment in recent years. At present, the main mechanisms of phosphorus removal in constructed wetlands are physical action (sedimentation), chemical action (sedimentation and adsorption) and biological action (plant absorption and microbial absorp...

AI Technical Summary

Problems solved by technology

Phosphate deposits produced by physical and chemical effects tend to aggravate the blockage of constructed wetlands, resulting in a decline in the overall removal function of wetlands. However, the phosphorus removal effect of constructed wetland biological methods is unstable and greatly affected by the environment, and the operation and management are more complicated. , and if the plants at the end of growth are not harvested in time, the resulting plant residues will increase the concentration of phosphorus in the effluent after being input into the constructed wetland

The above-mentioned problems have led to the low efficiency of phosphorus removal in my country's existing constructed wetland technology, and the water quality after treatment often fails to meet the discharge standards, and the secondary phosphorus removal treatment often increases investment costs and increases the operation and maintenance of constructed wetlands. burden

[0003] On the other hand, the once popular rural biogas digesters were gradually abandoned in the process of urbanization, leaving a large number of waste gas ponds. If they are not properly utilized, they will also have an impact on the environment

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