Conical-Coiled Pipe Reactor for Anaerobic Sludge Digestion
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Solution Overview
Problem
Traditional anaerobic sludge digestion reactors have low efficiency due to difficulties in retaining high-activity anaerobic microorganisms, limited microstructure change, and inefficient solid-liquid micro-interface reactions, leading to reduced organic matter dissolution and bio-gas production.
Innovation Solution
A conical-coiled pipe coupling device with a thermostat and conductive catalytic coating is used to control retention time and spatial distribution of sludge, promoting adhesion and electron transfer for hydrolytic acidification bacteria and methanogens, and continuously updating solid-liquid interfaces for enhanced anaerobic biochemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional anaerobic sludge reactor is completely mixed, then the reactor operation is simple, but high-activity anaerobic microorganisms are difficult to retain and are discharged with biogas residues, causing loss of dominant microorganisms
Solution Approach 1:
The reactor is divided into multiple zones: an upper reaction zone with coiled pipes for microorganism retention, a middle separation zone, and a lower discharge zone. This segmentation allows different functions in different regions - the coiled pipes create retention areas for microorganisms while the lower zone handles discharge, resolving the contradiction between simple operation and microorganism retention.
Solution Approach 2:
The coiled pipes act as an intermediary structure that creates a three-dimensional network within the reactor. This network serves as a carrier for microorganisms and creates resistance to flow, preventing microorganisms from being discharged with the effluent while maintaining relatively simple reactor operation without complex mechanical retention devices.
2Stability of the object's composition
If a traditional anaerobic reactor is completely mixed, then the mixing is uniform, but the microstructure of sludge is difficult to change and mass transfer of organic macromolecules is limited
Solution Approach 1:
The coiled pipes are arranged in a three-dimensional curved network throughout the reactor. This curved structure creates turbulent flow patterns and enhances mixing at the micro-scale, changing the microstructure of sludge and improving mass transfer of organic macromolecules while maintaining overall sludge uniformity through the distributed arrangement.
3Stability of the object's composition
If aggregates are formed between sludge matrix and anaerobic microorganisms in a traditional reactor, then the structure is stable, but micro contact surfaces are difficult to update in real time, limiting solid-liquid micro-interface reaction efficiency
Solution Approach 1:
The coiled pipe system creates dynamic flow patterns that continuously update the contact surfaces between sludge and microorganisms. The curved pipes generate vortex flows and prevent stagnant zones, ensuring that micro contact surfaces are constantly renewed while the sludge matrix maintains its structural stability through the gentle mixing action.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device significantly improves anaerobic sludge digestion efficiency by retaining microorganisms and enhancing biochemical reactions, resulting in higher methane yield and organic matter degradation rates, effectively treating perishable organic wastes.
Implementation Method 1
based on an anaerobic digestion mode of bionic cattle stomach and human intestines and stomach, the retention time and spatial distribution of perishable organic wastes such as sludge in the reactor are controlled by utilizing a conical structure
Implementation Method 2
a coiled pipe and an conductive catalytic coating on the inner wall are used for continuously updating solid-liquid micro-interfaces in perishable organic wastes
Implementation Method 3
extracellular electron transfer in an anaerobic microorganism system is strengthened
Implementation Method 4
the mass transfer of organic macromolecules of the sludge and the extracellular electron transfer of the vital activity of anaerobic microorganisms are limited
Data Source
AI summary
Disclosed are a device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling and an anaerobic sludge digestion method. The device comprises a feeder (A-3, B-3), a conical-coiled pipe coupling reactor (A-1, B-1) and a thermostat (A-4, B-4), wherein the bottom of the feeder (A-3, B-3) communicates with the top of the conical-coiled pipe coupling reactor (A-1, B-1), and the bottom of the feeder (A-3, B-3) is flush with the top of the thermostat (A-4, B-4); the conical-coiled pipe coupling reactor (A-1, B-1) is arranged in the thermostat (A-4, B-4); the whole coupling reactor (A-1, B-1) is in a regular cone shape or an inverted cone shape; and a main body of the coupling reactor (A-1, B-1) is a coiled pipe (A-2, B-2).