Subject: ”A drop of water is worth more than a pouch of gold to a thirsty man”
Introduction
Being diving into the specifics, we should explain, ”what is wastewater engineering’? Wastewater engineering is a specialization from degrees such as civil, environmental, chemical, bio-chemical engineering. This specialization mainly deals with the issue of transporting and cleaning all types of water including black water (waste water & sewer water), grey water (cleaner water from bathroom, sinks, kitchen, washing machine and other tools) & irrigation water.
Most people understand that wastewater is an important topic or at least acknowledge that it has some relevance to engineering but for most part we tend to ignore it or put little thought to it but the reality is that it is a crucial part of engineering more than we actually thought.
Wastewater is important to our lives because water is the essence to all life on earth and living in Australia it has high importance especially when our precious water resources are becoming scarce due to many issues associated with our excessive use of water and climate change. For this reason the skills within this field have been mainly developed to provide us clean drinking water, properly treating wastewater and removal of dirty water. There is much more to explain the topic of wastewater engineering and its applications but this is pretty much the gist of what we should understand.

Discussion
So the next question we ask ourselves what does wastewater compose of? The constituent of wastewater includes suspended solids, biodegradable organics, pathogens, nutrients, heavy metals and dissolved inorganic substances. Wastewater is 99.7% water and the rest are its constituents which make up a very small percentage.
If left untreated suspended solids may lead to developments of sludge deposits and anaerobic conditions when released in the aquatic environment. Biodegradable organics is mainly made of carbs, fats, proteins and the issue of releasing it into the environment untreated will lead to depletion of oxygen resources and even worse it can cause the development of septic conditions. Pathogenic organisms that may be in the wastewater may transmit infectious diseases. Nutrients such as nitrogen, phosphorous and carbon are also found in wastewater and when discharged into an aquatic environment it lead to growth of undesirable aquatic life and when discharged onto land in high quantities it leads to groundwater pollution. Heavy metals found in wastewater is mainly caused by dumping of metals from commercial and industrial companies in which is needs to be completely removed in order to recycle the wastewater. A better solution for heavy metals is that these companies do not even dump their garbage in the water. Dissolve inorganic such as sodium, calcium and sulfates which are added to water mainly due to use of household products which needs to be removed in order to recycle the wastewater.
For most part, just about all the constituents of wastewater is toxic and needs to be treated if we are to make it into safe drinking water. Heavy metals should not be dumped in the water at all costs in the first place and the issue is that a lot of the dumping is unregulated by the government (perhaps they may be involved in it in the first place) so tight laws needs to be in place with hefty fines for companies that breach the regulations. Other toxic constituents in the wastewater must be heavily treated so that it leaves zero chance to create any health issues (priority!) and minimized environmental impact.
There are 3 main stages to treating water which are the primary, secondary and tertiary treatment. In the first stage all heavy solids are removed. The second stage removes dissolved and biological matter. The third stage removes any extra stuff which the first two stages could not remove and this process may be repeated multiple times with different methods such as disinfection. The final treatment may also vary depending on the site of discharge. The treated water is referred to as effluent which is the final product that is safe enough to eject it back into the aquatic environment which little to no harm to the existing ecosystem and environment. Depending on how clean the water it may be discharged in the stream, river, bay, groundwater, irrigation or any other agricultural uses.
Major challenges faced by wastewater operation plants are energy consumption, energy, sludge production and cost of running the facility. Wastewater plant are one the highest energy consuming facilities in any country. This is a job that is very demanding of staff that requires them to be on call at any time of the day which varies at different times during the year not to mention trying to recruit and adequately train workers for this job is a huge issue. The proposed solution to this is to have more automation to replace high workers and saving huge money on salaries. Sludge production are the leftover after treating wastewater and it becomes a huge burden in disposing it.The best solution is to recycle and reuse and useful organic matter and nutrients. Increasing population only means that costs of running the facility increases too as treatment is the primary and secondary stages requires huge areas of land and expansion of facility is needed to meet the demands of an ever increasing population.

Conclusion
Water is a precious resource as we waste it in abundance with little care. We’ve gone to the point to even recycling used water due to its scarcity and sad enough there are people today who have no clue about this. The environment is also polluted by organisations/companies dumping their garbage in rivers with little care. Our homes are not restricted to our houses but the land that our houses are in. We should have government funded schemes to educate the population and the rising youth on importance of wastewater engineering and how we can all play a role in helping the environment.
Vlog link: https://www.youtube.com/watch?v=TkgNiz6FIDw



