In Situ Sludge Remediation Using Phoslock and Calcium Peroxide
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Solution Overview
Problem
Existing methods for in-situ treatment of endogenous pollution in sludge are challenging to implement, especially in black and odorous rivers and large lakes, as they often focus on single pollutant indices and have restrictive construction requirements, making them difficult to scale and effective.
Innovation Solution
A combination of Phoslock, calcium peroxide, and aluminum modified zeolite is added to the water surface in a controlled manner, with Phoslock suspended in water initially to enhance its effectiveness, and then calcium peroxide and zeolite are added to achieve natural settling, monitoring water quality to adjust dosages until all indices meet Class V water standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional in-situ treatment methods are used, then single pollutant indices can be improved, but comprehensive pollutant removal is insufficient
Solution Approach 1:
The patent combines three different treatment agents (Phoslock for phosphorus, calcium peroxide for organic pollutants and ammonia nitrogen, and aluminum modified zeolite for comprehensive adsorption) into a single in-situ treatment system. This merging of multiple functional materials allows simultaneous removal of various pollutants including COD, ammonia nitrogen, and total phosphorus, achieving comprehensive water quality improvement rather than treating single pollutants in isolation
Solution Approach 2:
The treatment system is designed with multi-functionality where calcium peroxide serves multiple purposes: oxidizing organic pollutants (COD reduction), converting ammonia nitrogen to nitrate, and releasing oxygen. Aluminum modified zeolite provides universal adsorption capability for multiple pollutants. This universal approach enables a single treatment system to address multiple water quality issues simultaneously
2Ease of operation
If Phoslock is directly added to water surface, then application is simple, but organic pollutants wrap on surface reducing effectiveness
Solution Approach 1:
The patent applies preliminary action by suspending Phoslock in water before application. This pre-treatment step ensures that Phoslock particles are properly dispersed and activated in the water medium, preventing organic pollutants from wrapping around the particles and blocking their functionality. The suspension process prepares the Phoslock for optimal performance in removing phosphorus from the water
3Reliability
If calcium peroxide and zeolite are added in large amounts, then treatment effectiveness increases, but construction complexity and dosing control become difficult
Solution Approach 1:
The patent implements feedback control by establishing a water quality monitoring system that tracks key parameters (COD, ammonia nitrogen, total phosphorus) throughout the treatment process. Based on the monitored water quality data, the dosing amounts of calcium peroxide and aluminum modified zeolite are dynamically adjusted. This feedback mechanism ensures optimal treatment effectiveness while avoiding excessive dosing, simplifying construction control through data-driven decision making
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 comprehensive pollutant removal, reducing COD, ammonia nitrogen, and total phosphorus concentrations by 90% or more, with minimal secondary pollution and suitable for large-scale implementation, improving water quality and preventing future deterioration.
Implementation Method 1
adding water to suspend phoslock to obtain wet dosing phoslock
Implementation Method 2
adding calcium peroxide can effectively improve dissolved oxygen in water
Implementation Method 3
drying aluminum modified zeolite to prepare dry dosing aluminum modified zeolite
Implementation Method 4
adding a combination of chemicals to a black and odorous river to remove various pollutants
Data Source
AI summary
The present invention discloses a highly effective in situ treatment method for endogenous pollution in sludge, belonging to the field of environmental engineering water treatment. In view of the problem that it is difficult to effectively treat the endogenous pollution of river sludge, the present invention provides the highly effective in situ treatment method for endogenous pollution in sludge, which specifically adopts a combination of phoslock, calcium peroxide and aluminum modified zeolite to perform in-situ remediation of sludge, effectively inhibit the release of endogenous pollution of sludge, facilitate the ecological treatment of polluted water subsequently, and finally realize the long-term water improvement against pollution.