Ningbo Zhuhong Nano black odor pit pond remediation case introduction
Background
Due to the formation of black smelly potholes due to long-term rainwater accumulation, there are about 5,000 black smelly potholes in the local area, covering an area ranging from about 900m2 to 2,000m2, with an average water depth of about 4m.
Purpose of treatment
Purely ecological treatment (no chemical agents), black stink puddle ponds to achieve the effect of removing black odor.
Water quality parameters
There is a large amount of domestic garbage in the pond, the silt on the bottom of the pond is too thick, the surrounding domestic wastewater is directly discharged, the water environment is poor, the original water body of the pond is black and smelly, eutrophication is serious, the dissolved oxygen is extremely low, the ammonia nitrogen exceeds the standard, and the bottom soil contains a large amount of odorous gases such as methane and hydrogen sulfide.
| Sample properties | odors |
chemical oxygen demand （mg/L） |
ammonia nitrogen （mg/L） |
transparency （m） |
dissolved oxygen （mg/L） |
Water quality | note |
|
Light green Lots of duckweed |
stink |
662.15 |
57.75 |
0.44 |
1.4 |
劣Ⅴ
|
September 19th Sampling during preliminary research |
Problems
Black smelly pit pond water environment is poor, seriously affecting the daily life of the surrounding villagers, in order to achieve the goal of local green water and green mountains, there is an urgent need to solve the problems of black smelly water, eutrophication, extremely low dissolved oxygen, ammonia nitrogen levels exceeding the standard; the bottom layer of garbage is too thick, irregularly there is garbage floating up; the surrounding dry latrines and other pollutants discharged into.
Solution
After manually salvaging most of the duckweed, put Ningbo Zhuhong Nano Technology Co., Ltd's nano bubble generator to increase the dissolved oxygen of the water body, degradation of organic matter and ammonia nitrogen, combined with the duckweed collection device, an effective solution to the problem of excessive ammonia nitrogen in the water body, insufficient dissolved oxygen, poor transparency.
Installation of nano bubble generator
In order to prevent the deposited garbage layer from being centrally rolled up in a short time, methane and other gases are centrally leaked, affecting the life of the surrounding people, all nano-bubble generators are installed in a suspended manner, the device is located about 2-3 meters below the water surface, two sets of nano bubble generators are put in, and the nano-bubble generators are suspended in the water by using floats.
The effect of black smelly puddle pond treatment is recognized by the government
The leaders of the local county government are very satisfied, and have arranged for each town government to formulate a procurement plan for their own actual situation. The first batch of equipment purchasing and installation will be completed in the near future. Then according to the actual situation to develop the next batch of procurement plan.
Leaders from surrounding counties and cities have been visiting the first batch of potholes, and have begun to contact them one after another, resulting in a point to lead to the effect.
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