-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
(1) Pond site selection of stable ponds occupies a lot of land, which can make full use of land that is not suitable for farming, such as abandoned rivers, ponds and dams, low-lying land, swamps and barren land; if there is a height difference, it should be fully utilized
.
In order to prevent the interference of the odor when turning the pond in spring and autumn, the pond site should be more than 1000-2000m away from the residential area and located in the downwind direction of its dominant wind
(2) Pond type and its combination Pond types are fully determined in accordance with local climate and topographical conditions
.
For example, in areas with sufficient sunlight and no continuous freezing period, aerobic ponds can be selected; when treating high-concentration organic wastewater, anaerobic ponds should be set up in the system; when treating urban sewage and industrial wastewater, it should be based on the nature of the raw water And the use and requirements of water treatment, adopt multi-pond combination system
(3) The design parameters are based on the flow characteristics of wastewater in the pond, such as channel flow, short flow and back mixing in the pond, which will affect the mixing and mass transfer process of wastewater in the pond, and the removal rate of organic matter will decrease
.
The design hydraulic conditions are as follows:
① The ponds run in series and the number is not less than 3;
②If the pond is rectangular, the aspect ratio should be greater than 3, and the area of each pond should be 5000m 2 ;
③Multiple water inlets are better, the inlet is 0.
5m away from the bottom of the pond, and the outlet should be as far away from the inlet as possible;
④ Try to install diversion walls, the horizontal diversion length is 0.
8 times the pond width, and the longitudinal diversion wall length is 0.
7 times the pond length;
⑤ A horizontal sludge ditch is set at regular intervals along the length of the pond, and a baffle is set above the ditch.
The baffle extends into the water about 0.
9m, and the part above the water surface is no more than 0.
15m
.
Table 8-2 Main design parameters of my country's stabilization pond
①Volume load, the unit is kgBOD 5 /(m 3 pond capacity·d).
Note: In Zone I, the average temperature is <8℃, in Zone II, the average temperature is 8-16℃, and in Zone III, the average temperature is >16℃
Related Links: Advantages and disadvantages of stabilizing pond treatment process
