Multilayer Earthworm Reactor for Sludge Treatment
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Solution Overview
Problem
Conventional earthworm treatment techniques for sludge are limited by long treatment cycles, large occupied areas, low efficiency, and susceptibility to temperature and climate variations, as well as issues with odor and mosquito breeding, restricting their large-scale application.
Innovation Solution
The earthworm reactor of a frame composite structure, which combines physical and chemical properties of sludge with earthworm treatment characteristics, features a multilayered reactor design with aerator and filtrate collection systems, controlled environment conditions, and a method involving specific layer configurations and earthworm management to enhance treatment efficiency and reduce space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional earthworm treatment technique is used, then sludge can be treated with environmental benefits, but treatment cycle is long and occupied area is large
Solution Approach 1:
The reactor is divided into multiple layers with different functional zones (aerobic zone, anaerobic zone, earthworm inhabiting zone, filtrate collection zone), allowing simultaneous execution of different treatment processes in parallel, thereby reducing overall treatment cycle time while maintaining environmental benefits
Solution Approach 2:
The treatment process transitions from conventional horizontal ground spreading to vertical stacked layers, utilizing the vertical dimension to increase treatment capacity without increasing occupied ground area, thus reducing both treatment cycle and space requirements
2Object-affected harmful factors
If conventional earthworm treatment technique is used, then sludge treatment can be performed, but occupied area is large
Solution Approach 1:
The reactor employs a vertical stacked multi-layer design that maximizes the use of vertical space, enabling high-capacity sludge treatment in a compact footprint, thus reducing occupied area while maintaining treatment effectiveness
Solution Approach 2:
Multiple functional layers are nested vertically within the reactor structure, with each layer containing specific components (aerator pipes, filtrate collecting pipes, earthworm habitats) that work together, achieving high treatment capacity in minimal space
3Object-affected harmful factors
If conventional earthworm treatment technique is used, then sludge can be degraded, but treatment efficiency is low
Solution Approach 1:
The reactor implements periodic aeration cycles that alternate between aerobic and anaerobic conditions, stimulating earthworm activity and enhancing sludge degradation rates, thereby improving treatment efficiency while maintaining effective sludge breakdown
Solution Approach 2:
The system dynamically adjusts oxygen supply parameters through controlled aeration, creating optimal conditions for earthworm metabolism and sludge degradation, which significantly enhances treatment efficiency compared to static conventional methods
4Productivity
If conventional earthworm treatment technique is used, then organic fertilizer can be produced, but odor and mosquito breeding occur
Solution Approach 1:
The reactor design extracts and separates the liquid filtrate containing potential odor-causing substances and mosquito breeding media into a dedicated collection zone at the bottom, isolating it from the earthworm inhabiting zones, thus enabling vermicompost production while eliminating odor and mosquito problems
Solution Approach 2:
The filtrate collection layer acts as an intermediary barrier between the organic matter decomposition process and the environment, capturing and containing potentially harmful byproducts while allowing the earthworms to continue producing vermicompost in the upper layers
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
This approach significantly reduces treatment cycle time, minimizes occupied area, and improves operational efficiency, producing high-quality vermicompost and earthworm filtrate while reducing odor and mosquito issues, offering economic and environmental benefits.
Implementation Method 1
an aerator pipe and a filtrate collecting pipe are arranged in the reactor box body of each layer; an aerating air supply pipe connected to the aerator pipe of each layer
Implementation Method 2
an isolating filter layer, a sand grain supplementing layer, an earthworm inhabiting layer, a nutrient supplementing layer and a sludge treatment layer which are separately paved from bottom to top in the main box body; the filtrate collecting pipe of each layer is located on the bottom of the isolating filter layer
Data Source
AI summary
An earthworm reactor comprises a main body frame and multilayered reactor box bodies located in the main body frame. A bottom plate is arranged at the bottom of each layer of the main body frame, and the reactor box body is movably arranged on the bottom plate of each layer; an aerator pipe and a filtrate collecting pipe are arranged in the reactor box body of each layer; an aerating air supply pipe connected to the aerator pipe of each layer and a filtrate centralizing pipe connected to the filtrate collecting pipe of each layer are separately arranged on one side of the main body frame; the aerating air supply pipe is connected to an external aerating device and the bottom of the filtrate centralizing pipe is connected to an external liquid storage tank.