First of all, before we think about the disadvantages of the current ways to dispose wastewater, we have to know types of wastewater.
Types of wastewater are:
Sanitary(domestic): This comes from homely sources including toilets, sinks and bathing. This may contain dangerous micro-organisms.
Industrial: This comes from almost all factories and refineries. This may contain toxic chemicals and/or harmful acids.
Now we have discussed types of wastewater let us discuss the disadvantages of the current ways to dispose wastewater.
Ways to dispose wastewater and their disadvantages:
Ocean Disposal: this happens by dumping waste water into the ocean; disadvantage: diseases have often been caused by discharging inadequately treated wastewater. Such discharges are called water pollution, and result in the spreading of disease, and destruction of aquatic life.
Nuclear Disposal: Radio-active materials theta are being cased then buried in a certain area; disadvantages: accidents may result into leakage of radiation which will have an extreme negative affect on the surroundings; have long half life; some people search for such materials for non noble reasons.
Water Recycling: Instead of getting rid off wastewater it is being reused after treatment; disadvantages: Not treated to a high enough standard to make it safe for drinking; drinking this water could produce health risks to you.
Now we are finished of the disadvantages of wastewater we should have a look on new suggested ways to dispose wastewater.
New ways to dispose water are:
Sludge treatment: The sludge from the sewage treatment plant requires anaerobic digestion to ensure thermal elimination of most pathogens. Alternatively, it may be dried in natural drying beds and then incinerated together with solid infectious health-care waste. On-site treatment of hospital sewage will produce a sludge that contains high concentrations of pathogens.
Lagooning: In a region or an individual health-care establishment that cannot afford sewage treatment plants, a Lagooning system is the minimal requirement for treatment of wastewater. The system should comprise two successive lagoons to achieve an acceptable level of purification of hospital sewage. Lagooning may be followed by infiltration of the effluent into the land, benefiting from the filtering capacity of the soil. There is no safe solution for the disposal of sewage from a hospital that cannot afford a compact sewage treatment plant and that has no space available to build a Lagooning system.
These were all the suggestions of how to improve water disposal could you give yours?