Synergistic Odor Control Composition for Wastewater
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Solution Overview
Problem
Current wastewater treatment methods are inefficient in controlling hydrogen sulfide levels, often requiring excessive amounts of odor control chemicals and being costly, as they either rely on sulfide-reducing agents that act quickly but are hazardous and expensive, or sulfide prevention methods that are less effective in long-term odor control.
Innovation Solution
A synergistic approach using a combination of nitrate salts as sulfide-reducing agents and chlorite as oxidizers, which when used together in a specific dosage, provide effective odor control with reduced chemical quantities, leveraging their biochemical and chemical mechanisms to inhibit sulfate reduction and oxidize hydrogen sulfide, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sulfide-reducing agents are used alone for odor control, then sulfide levels are reduced quickly, but the chemical dosage required is excessive and costs are high
Solution Approach 1:
The patent combines a sulfide-reducing agent (nitrate salt) with an oxidizer (chlorite) into a synergistic composition. The nitrate reduces sulfide to sulfur and nitrogen gas, while the chlorite oxidizes hydrogen sulfide to elemental sulfur. Together, they achieve superior odor control at lower dosages than either agent alone, resolving the contradiction between effectiveness and chemical quantity required.
Solution Approach 2:
The invention creates a composite chemical composition containing both nitrate salt and chlorite in specific proportions. This composite material leverages the complementary mechanisms of reduction and oxidation to achieve enhanced sulfide control efficiency, allowing lower overall chemical dosage while maintaining or improving odor control performance.
2Quantity of substance
If sulfide prevention methods are used alone, then chemical dosage is reduced, but odor control effectiveness is insufficient
Solution Approach 1:
The patent merges the preventive mechanism of nitrate (which competes with sulfate for bacterial reduction) with the oxidative mechanism of chlorite (which directly oxidizes hydrogen sulfide). This combination achieves both prevention and active removal, providing superior odor control effectiveness at reasonable chemical dosages.
Solution Approach 2:
The invention optimizes the concentration ratio of nitrate to chlorite in the composition, along with adjusting pH levels, to maximize the synergistic effect. By carefully controlling these parameters, the system achieves enhanced odor control effectiveness while maintaining efficient chemical usage.
3Productivity
If high doses of odor control chemicals are applied, then odor control effectiveness is improved, but treatment costs increase substantially
Solution Approach 1:
The synergistic combination of nitrate and chlorite produces a greater-than-additive effect, where the combined odor control effectiveness exceeds the sum of individual agent performances. This allows achievement of target odor control levels at lower total chemical dosages, reducing treatment costs while maintaining effectiveness.
Solution Approach 2:
The patent optimizes dosage parameters and composition ratios to minimize chemical consumption while achieving required odor control performance. Field studies demonstrated that the synergistic composition achieves superior odor control at lower dosages compared to conventional single-agent treatments, reducing operational costs.
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 method achieves superior odor control with reduced chemical usage, resulting in substantial cost savings and increased efficiency by using less total chemical while maintaining hydrogen sulfide levels below threshold values, as demonstrated in field studies.
Implementation Method 1
The nitrate is generally reduced by a denitrification process to odorless nitrogen gas
Implementation Method 2
selecting an odor control composition comprising a sulfide-reducing agent and an oxidizer
Data Source
AI summary
An odor control composition may be dosed to a wastewater treatment system to control hydrogen sulfide levels. The composition may include a sulfide-reducing agent and an oxidizer. Synergy between the compounds of the odor control composition may facilitate efficient reduction of hydrogen sulfide levels. The sulfide-reducing agent and the oxidizer may be present in a single odor control composition or may be dosed to the system separately.