Ash Alkalizing Agent for Wastewater pH Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional alkalizing agents used in industrial, municipal, and domestic effluents are costly and seek cost-effective alternatives with comparable or better alkalizing and buffering properties.
Innovation Solution
Using industrial and incineration ash, particularly those with high CaO, K2O, and MgO content, to alkalize aqueous systems by adding them in the form of slurries or solids, which can substitute conventional alkalis and buffer chemicals, achieving pH adjustments and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional alkalizing agents (NaOH, KOH, MgO, CaO) are used to adjust pH and buffer aqueous systems, then effective alkalizing and buffering properties are achieved, but considerable financial expenditure is incurred
Solution Approach 1:
The patent substitutes expensive conventional alkalizing agents (NaOH, KOH, MgO, CaO) with inexpensive ash material that can be readily disposed of after use. The ash provides sufficient alkalizing and buffering capacity for wastewater treatment without requiring recovery or regeneration, embodying the disposable object principle by using a cheap, single-use material替代昂贵的可回收化学品
Solution Approach 2:
The patent converts waste ash material (a harmful or useless byproduct) into a beneficial alkalizing agent for wastewater treatment. By utilizing the alkaline components in ash that would otherwise be discarded, the invention transforms a waste stream into a valuable chemical resource, achieving both environmental benefit and cost savings
2Manufacturing precision
If high amounts of alkalizing agents are added to achieve desired pH values, then pH adjustment is effective, but over-basing occurs causing unwanted deposits and increased chemical oxygen demand
Solution Approach 1:
The patent applies partial action by using ash material that provides just sufficient alkalizing capacity to reach the desired pH range (6.5-8.0) without excessive addition. The ash's natural composition and slower reaction characteristics allow for more precise control, preventing over-basing while still achieving effective pH adjustment
Solution Approach 2:
The ash material acts as an intermediary substance that buffers pH changes more gradually than strong alkalis. Its composition includes multiple alkaline components that release hydroxide ions progressively, providing a buffering effect that prevents sudden pH jumps and reduces the risk of over-basing and associated harmful effects
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 use of ash provides a cost-effective alternative to conventional alkalizing agents, preventing over-basing, reducing chemical oxygen demand, lowering biological oxygen demand, and avoiding unwanted deposits, while maintaining effective bleaching and stabilization of aqueous systems.
Implementation Method 1
the use of ash for alkalizing aqueous systems... By utilizing the alkalinity of the ashes or their derivatives
Implementation Method 2
ash includes industrial and combustion ash as well as residues... capable of substituting conventional alkalis, thus providing a cost-effective alternative
Data Source
AI summary
The industrial/incinerator ash or chemically/physically modified ash for alkalization of solid, liquid or gaseous systems. The systems have a pH value greater than 7. The ash is used for adjusting the water hardness. The solid, liquid, or gaseous systems are water, waste water, process water, closed loop water, waste paper, wood fibers, textiles, exhaust gases, sludges, biosludges, clarifying sludges and residues. The amount of ash is 0.001-100 wt%.