Effluent treatment plant

This compendium of leach pit toilet design was developed keeping in mind different geo-hydrological  region of Odisha to boost the sanitation movement of the states through Swachha Bharat Mission ( Rural) for Odisha State Water Sanitation Mission

Among all Earthly Elements, Water has great importance. Globally, we consume around 4 trillion cubic meters of water yearly of which a significant amount of it is thrown untreated into water bodies due to the high cost of the water treatment process. So, we are proposing the idea of using soluble powder having magnetic properties to settle suspended particles in a fraction of a minute. This process will reduce the cost of filtration of water by minimizing the maintenance of RO filters required, decreasing processes required for filtration of macromolecules.

Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry's ETPs were under construction or exist but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the temperature, pH, and total dissolved solids (TDS) values were within the standard limit for all of the collected effluent samples. The chloride concentration of the three effluent samples surpassed the limit. The biological oxygen demand (BOD) and chemical oxygen demand (COD) limit were exceeded for the effluent sampling sites S-6 and S-7 collected near the food and beverage industry. Besides, the maximum dissolved oxygen (DO) values of the effluents were below the standard which indicates poor water quality. Environmental nuisance is producing in Noakhali industrial area as maximum industries have not enough wastewater treatment facilities. Present study demonstrated that it is obvious Md. Shiblur Rahaman, Fozia Momotaz, Afrida Nurain, Protima Sarker, Sahoko Ichihara 152 to operate the ETP regularly for improving the quality of effluents to save our native environment from the harmful effects of wastewater.

Hospital effluent is often regarded as an important source of pathogenic microorganisms like
bacteria, viruses and parasitic ova. Counts of all these microorganisms were enumerated in
various stages of effluent treatment plant (ETP) such as equalisation tank (ET), aeration tank
(AT), settling tank (ST), chlorination tank (CT), polishing tank (PT) and sludge dry beds.
The microbial parameters includes total viable count (TVC), total coliforms (TC), faecal coliforms
(FC), faecal Streptococci (FS), Staphylococci, Pseudomonas, Salmonella and Shigella.
The raw sewage contains 35 % of 19.6 X 102 CFU/mL of bacteria as coliforms and E. coli as
a typical faecal flora. There was a substantial reduction (> 2 log) noticed for the effluent in
settling tank. Mass of the bacteria in the hospital effluent remains tightly attached to the solid
particles. These are removed by aeration and clarification or settling by physical processes like
flocculation. The treated effluent still contains sizeable counts or loads of bacteria even though
disinfection procedures like chlorination are followed. Bacteria in sludge dry beds are exceedingly
rigorous and higher concentration of chlorine is required for decontamination and
other disinfection procedures such as UV radiation, Ozonization and sunlight disinfection are
required for the reduction. Further work will be carried out to design and construct a portable
low cost disinfection unit for the disinfection of harmful pathogenic microbes.