Wastewater Sludge Oxidation Hydrolysis Process
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Solution Overview
Problem
Current waste disposal technologies, such as landfilling and alternative rapid disposal methods, face economic inefficiencies and generate negative environmental and health impacts due to the production of toxic by-products and hazardous sludge from wastewater treatment processes, with no economically advantageous method for reusing excess sludge.
Innovation Solution
A process involving acid and alkaline oxidizing hydrolysis followed by chemical conditioning and separation of undissolved residues, which chemically oxidizes organic carbon, structurally modifies waste, and results in a biodegradable eluate and a compostable solid residue suitable for agronomic use, reducing waste volume and eliminating hazardous emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If landfilling is used for waste disposal, then natural degradation of organic constituents occurs, but the process takes an extremely long timescale (about 25 years) and landfill sites are rapidly exhausting
Solution Approach 1:
The patent applies chemical oxidation parameters (adding oxidizing agents like Fenton's reagent, ozone, or hydrogen peroxide) to transform the slow natural degradation process into a rapid chemical breakdown process, reducing the degradation timescale from 25 years to days or hours while maintaining complete mineralization capability
Solution Approach 2:
The patent uses strong oxidizing agents (Fenton's reagent, ozone, hydrogen peroxide) to accelerate the oxidation of organic carbon to CO2 and mineralization of other components, dramatically speeding up the degradation process compared to natural landfilling while achieving complete breakdown
2Loss of time
If alternative rapid disposal technologies are used, then disposal time is reduced, but toxic by-products are generated and negative environmental and health impacts occur
Solution Approach 1:
The patent employs controlled chemical oxidation with strong oxidants (Fenton's reagent, ozone, hydrogen peroxide) to completely mineralize organic matter to CO2, water, and inorganic salts, avoiding the formation of toxic intermediate by-products that plague other rapid disposal methods by ensuring complete oxidation
Solution Approach 2:
The patent carefully controls oxidation parameters (pH, temperature, oxidant dosage, reaction time) to ensure complete mineralization of organic carbon to CO2 and conversion of nitrogen to nitrate/nitrite and phosphorus to phosphate, preventing the formation of harmful by-products while achieving rapid disposal
3Object-affected harmful factors
If excess sludge is disposed of in landfill, then hazardous waste is contained, but economic costs are very expensive and landfill sites are rapidly exhausting
Solution Approach 1:
The patent transforms hazardous sludge from a waste product into a valuable resource by controlling oxidation parameters to produce a sterile, compostable residue rich in humic substances and plant nutrients, eliminating landfill costs and creating a marketable agricultural product that generates revenue
Solution Approach 2:
The patent converts hazardous excess sludge containing heavy metals and organic pollutants into a beneficial agricultural compost product by using controlled chemical oxidation to destroy pathogens and stabilize contaminants, transforming a harmful waste into a valuable soil conditioner and fertilizer
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 process effectively reduces waste volume and weight, eliminates hazardous emissions, and produces a safe, compostable residue that can be reused as a fertilizer, offering a cost-effective and environmentally friendly solution for wastewater sludge disposal.
Implementation Method 1
performing an acid oxidizing hydrolysis of the incoming waste (charge)
Implementation Method 2
performing an alkaline oxidizing hydrolysis of the outgoing mass from the acid oxidizing hydrolysis
Implementation Method 3
both of the organic carbon fraction, which is oxidized to the stage of maximum oxidization (CO2) and of the other essential components such as nitrogen, phosphorus and hydrogen
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
Process for the disposal of wastes, comprising: performing an acid oxidizing hydrolysis of the incoming waste (charge); performing an alkaline oxidizing hydrolysis of the outgoing mass from the stage of acid oxidizing hydrolysis; chemically conditioning the outgoing mass from the stage of alkaline oxidizing hydrolysis by the addition of an acid reagent; separating any undissolved residue. This process, by comparison with other methods and technologies already known and in use, features the following advantages: superior effectiveness in reducing the weight of the waste; superior economy; total absence of ecological, environmental, hygiene and sanitary problems; total safety of personnel employed at the plants; enhancement for agricultural use of any exhausted residue which may be present at the end of the treatment.