The river remediation should be carried out in accordance with the basic technical routes of "source control and pollution interception, endogenous treatment, living water circulation, fresh water supply, water purification and ecological restoration". Source control and pollution interception are the most important in river remediation.
Interception of sewage in rivers with soft-enclosure
Principles
Soft enclosure is composed of floating body, separator and positioning block. The separator is made of anti-freezing, anti-oxidation and anti-corrosion polymer organic materials. The bottom is anchored and the upper is floated. Soft enclosure can expand freely according to the change of river water level to ensure the relative independence of polluted area and river water area. Then by follow-up enhanced water treatment measures, water in the polluted area can be purified to ensure rapid improvement of water quality and achieve sewage interception.
Solutions
Usual (including rainy days) enclosure status
Enclosure status during rainstorm
Enclosure status in dry season
Ex-situ Treatment Technology of Enclosure-MBR
Principle
For soft enclosure sewage, the company's solution is to provide MBR membrane bioreactor for heterotopic enhanced treatment, combined with intelligent monitoring to ensure long-term operation effect. Membrane bioreactor (MBR) uses membrane separation instead of secondary clarifier for solid-liquid separation. Compared with traditional biological treatment technology, MBR is not only efficient, but also stable, and is not affected by sludge characteristics and external factors.
Advantages
The company's MBR is an independent intellectual property brand "Huiheng Membrane" flat-panel microfiltration membrane system, and relying on the "135 National Water Pollution Control and Control Technology Major Special Project" - the research topic of industrialization secondary development and market promotion of key water technology achievements in Taihu Lake Basin (2018ZX07208-010), specially for black water. High throughput and modular membrane bioreactor (MBR) was developed for odor water treatment.
Ex-situ Treatment Technology of Sewage in Enclosure-Air Flotation/Magnetic Separation
Principle
For the soft enclosure sewage, another solution provided by our company is to use air flotation or magnetic separation equipment to strengthen ex-situ treatment, combined with intelligent monitoring to ensure long-term operation effect. This scheme is mainly aimed at the treatment of larger-scale river regulation projects.
Solutions
This scheme is mainly aimed at the treatment of larger-scale river regulation projects
River in-situ reactor
Principle
In-situ reactor is a main river area outside soft enclosure. By strengthening ecological floating island, combining with aeration filler measures, using biofilm attached to the filler and sufficient supply of oxygen, the organic matter in water can be oxidized and decomposed by biochemical action to achieve the purpose of purification.
Solution
This process is widely used in water treatment field of all walks of life because of its high efficiency, energy saving, small area, impact load resistance and convenient operation and management.
