Waste Water Treatment Process for Explosive Industries
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Solution Overview
Problem
The explosives industry faces challenges in effectively treating waste water from ANFO and emulsion explosives, as existing methods are costly, have high environmental impact, and lack efficient reuse options, leading to disposal issues that harm aquatic resources and public health.
Innovation Solution
A process involving single-stage chemical precipitation with hydrated lime followed by atmospheric CO2 carbonation, which reduces organic content and produces value-added by-products, allowing for the reuse of treated effluents as nutrient solutions and sludge with calorific potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional waste water treatment methods are used, then treatment effectiveness is improved, but treatment cost increases
Solution Approach 1:
The patent uses readily available, low-cost materials such as hydrated lime and atmospheric CO2 for treatment, replacing expensive conventional treatments. The process utilizes inexpensive reagents that can be easily sourced and applied without requiring costly specialized chemicals or equipment.
Solution Approach 2:
The process utilizes atmospheric CO2 from the air as a reagent, eliminating the need for expensive external chemical supplies. The system serves itself by using freely available environmental resources (air CO2) to complete the treatment process, reducing operational costs significantly.
2Reliability
If conventional waste water treatment methods are used, then treatment effectiveness is improved, but environmental impact increases
Solution Approach 1:
The patent converts harmful waste CO2 from industrial processes into a beneficial reagent for waste water treatment. By carbonating the effluent with atmospheric CO2, the process achieves pH neutralization and precipitation of contaminants, turning a harmful greenhouse gas into a useful treatment agent that reduces environmental impact.
Solution Approach 2:
The process recovers valuable by-products from the treatment process, including precipitated metals and carbonated calcium compounds. These recovered materials can be reused or disposed of safely, preventing environmental contamination and reducing the need for harmful chemical additions.
3Reliability
If conventional waste water treatment methods are used, then organic content reduction is improved, but process complexity increases
Solution Approach 1:
The treatment process is divided into simple, sequential steps: (1) addition of hydrated lime to raise pH and precipitate contaminants, (2) carbonation with atmospheric CO2 to neutralize pH and form additional precipitates, and (3) settling and reuse. Each step is straightforward and can be performed with basic equipment, avoiding complex multi-stage treatment systems.
Solution Approach 2:
The process combines multiple treatment functions into a single integrated system. Hydrated lime addition simultaneously raises pH, precipitates metals, and creates alkalinity, while subsequent CO2 carbonation neutralizes pH and forms additional precipitates. This merging of functions into simple sequential operations reduces process complexity compared to separate specialized treatment units.
4Reliability
If waste water is disposed of through evaporation ponds, then disposal is achieved, but air contamination risk increases
Solution Approach 1:
The patent converts the harmful ammonia present in waste water into a beneficial by-product. By controlling pH and carbonating the effluent, ammonia is converted to ammonium carbonate, which precipitates and can be recovered. This eliminates ammonia emissions to air while producing a useful fertilizer product, transforming a harmful substance into a valuable resource.
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 organic load, ammonia, and hydrocarbons, producing a stable effluent that can be reused, with a low environmental impact and cost, aligning with circular economy principles by valorizing waste water into valuable products.
Implementation Method 1
precipitation with hydrated lime and carbonation with atmospheric CO2
Implementation Method 2
carbonation with atmospheric CO2
Implementation Method 3
reduces the organic content of the effluent from the explosives industry
Data Source
Figure 1~2
Figure 3A~3D
Figure 4A~5
AI summary
The present invention relates to a process for treatment of waste water from the explosive industries, such as ammonium nitrate / fuel oil (ANFO) type and emulsion explosives. Said process comprises precipitation with lime and carbonation with atmospheric CO2. This treatment reduces the organic content of the effluent from the explosive industries and simultaneously produces by-products with value-added. In addition, the process of the present invention enables the capture and collection of compounds present in the effluent obtained and their subsequent reuse, both in the explosive industries and in other industries where they are required. Thus, the present invention is in the technical field of waste water treatment, specifically of effluents from the explosives industry.