- Contact Person : Mr. chen yanyu
- Company Name : Beijing IWHR Corporation
- Tel : 86-10-68455929
- Fax : 86-10-68411453
- Address : Beijing,beijing,20 West Chegongzhuang Road
- Country/Region : China
- Zip : 100044
Related Product Searches:Water Treatment plant,High Quality Wastewater treatment,Wastewater treatment z.s.k
Water treatment plant :
Wastewater is defined as water which carries wastes from homes, industries, businesses or
any other sources. It is usually a mixture of water and dissolved or suspended solids. Since
water is becoming a scarce commodity, hence it is imperative to evolve technologies which treat
them efficiently so that they can be reused. Treatment is also necessary because it helps in the
reduction of physical, physiological, radioactive,biological and chemical pollutants.
Types of Wastewater Treatment Plants
Depending on the nature of the wastewater to be treated, wastewater can be classified as:
· Sewage Treatment Plants
· Sludge Treatment Plant
· Industrial Wastewater Treatment
· Agricultural Wastewater Treatment Plant
· Radioactive Wastewater Treatment Plant
Effluent Treatment MethodEffluent treatment method consists of following process-Coagulation, Flocculation, Sedimentation, Filtration, Chlorination, Softening. For the best results
these process should be followed in sequence. The water so treated can be used again for any
industrial or other process. In some effluent plants however, sedimentation/settling units are used
for primary as well as for the secondary treatment of solid liquid separation. These solids are present
in colloidal forms which are are removed primary sedimentation/ setting tanks of clarifier.
Wastewater Treatment Methods
Wasterwater is treated in following stages:
Pre-Treatment
PreTreatment is a process which involves the passing of the effluent through the screen chambers
toremove large floating solid particles which are settled in the primary sedimentation tanks. In this process
apart from pre-chlorination, heavy suspended impurities are also removed.
Primary TreatmentPrimary treatment includes chlorination, sedimentation and sludge digestion. Sludge digestion takes place
in a sludge digester in which the organic or inorganic wastes and solids removed from sedimentation are
subjected to anaerobic fermentation. Since inorganic suspended solids hinders the performance of the
biological oxidation of organic matter hence their removal is necessary. Removal of organic suspended
solids present in the effluents reduce the aeration tank volume requirement which provides a primary
clarification system prior to aerobic biological treatment process.Secondary TreatmentIn a secondary treatment process bio solids are separated from the water. Here soluble organic matter
is biologically oxidized in the presence or the absence of oxygen. The process mainly removes dissolved
organic matter and reduces biological oxygen demand. Whole process takes place in a secondary treatment
system. A good secondary system has surface overflow rate of 16-80 metre cube/ meter square of the clarification area per day.Tertiary TreatmentTertiary treatment is primarily used to recycle water for industrial reuse. It may be also use if the effluent
from a secondary treatment plant is not satisfactory. The process used in tertiary treatment system are
filtration, demineralization and the reverse osmosis process.