Blog 6
Reflection
Winnipeg holds three pollution-control centres on the outskirts of the city where our sewage and wastewater goes after leaving our toilets from our homes. Follow this link for a picture gallary of where your sewage and wastewater goes after leaving your home (Follow the Flush). Once it reaches these sewage treatment plants it passes through screens to remove larger objects such as sticks and garbage. The garbage along with the grit are shipped to a landfill. The rest of the material is agitated and odour is removed by bubbling the sewage and wastewater so the gases can get vented (CBC, 2010). The sludge sinks to the bottom as it passes through the tanks. The North End Water Pollution Control Centre controls the sludge process and the other two treatment plants ship their sludge to the North treatment plant. There the sludge is digested by anaerobic bacteria for about 10 to 20 days until the odour and organic matter are reduced. It is then spun to separate the liquids from the solids. The solid part (sludge) is sent to agricultural land where it is used as a fertilizer (CBC, 2010). This does not surprise me too much, after all it needs to go somewhere. However, it does surprise me that treatment plants are not designed to filter out all dangerous substances to our environment. According to the Waterlife documentary film most treatment plants are designed mainly to deal with bacteria, metals, and solids. However, they are not designed to filter out new chemicals or even excess nutrients. That is one problem with the sewage treatment plants in the city of Winnipeg. The manager of the wastewater services in Winnipeg, admits that the treatment plant does not remove nitrogen and phosphorus and therefore is resulting in the extra algae growth in Lake Winnipeg (CBC, 2010). The excess nutrients allows for more algae to grow. This causes reduced recreational appeal, drinking water problems with both taste and odour, and clogs fishing nets (Goodman, 2010).

In the picture above you can clearly see the extra algae growth in Lake Winnipeg
Apart from the problems that you can see, algae growth has other major problems. The biggest is that the excess algae growth is leading to the process of eutrophication. Eutrophication is when the excess growth of plant life in a body of water leads to a decrease in the animal life. In winter when the algae die, decomposers break up the algae using up more oxygen. The oxygen level in the water decreases and many animals suffocate because they are unable to tolerate the high biochemical demand for oxygen (CBC News, 2010 and Lake Winnipeg Foundation). The manager of the wastewater services for the city of Winnipeg mentions that they are heading towards an added treatment process called a BNR process. This biological nutrient removal process involves growing a culture of bacteria that will consume these nutrients (CBC, 2010).
There are many different types of nutrients discharged into rivers that many of us would never think of until we are faced with the truth. While watching the video eWaste (follow this link to watch the video http://www.babelgum.com/118286/edump.html ). I learned a lot about what happens to many of our electronics after discarded. The majority are exported overseas to developing countries where the people there spend long hour work days separating the plastic from the metals. This process releases toxic gases into the atmosphere while they heat the plastic and metals and is a health hazard to the people. Guiyu imports over 1 million tons of e-waste per year and a part from air pollution it is being disposed into rivers. E-waste products including cell phones, computers, TV’s, etc can be very harmful to the environment and the health of the people if not discarded properly. For example, lead often found in the computer screens was found in high amounts among 165 kindergarden children who had blood tests taken. They found that the older the children the higher their blood-lead levels and the average measured about 150 ug/l. Many residents of these countries work 10 to 12 hours per day inhaling the toxic pollution that burns their eyes and lungs, but do it because they need the money. The Basel Action Network (BAN) is an organization that focuses on confronting this environmental injustice and the harm it brings upon the residents living near the toxic waste dumps. Management includes preventing disproportionate and unsustainable dumping of the world's toxic waste to developing countries and as well as promote sustainable consumption of our use in the developed countries (Basel Action Network, 2008).

Top picture shows an e-waste dump site near a river and the bottom picture shows woman separating the metal and plastic from an e-waste product.Resources
Basel Action Network. (2008) Basel Action Network. Retrieved April 8, 2010 from http:// www.ban.org/main/about_BAN.html
CBC. (2010). Lake Winnipeg in Crisis. Retrieved April 7, 2010 from http://www.cbc.ca/ manitoba/features/lakewinnipeg/wastewater.html
CBCnews. (2010). Oceans of Trouble. Retrieved April 7, 2010 from https:// angel.cc.umanitoba.ca/section/default.asp?id=MRG %2D100108%2D135747%2Dfa4d7ca9%2D8f3c%2D48c9%2D9eb0
Goodman, L. (2010). Environmental Science 1000 [Lecture notes]. Winnipeg, Manitoba: University of Manitoba, Department of Environment, Earth, and Resources.
Lake Winnipeg Foundation. The problems. Retrieved April 7, 2010 from http:// www.lakewinnipegfoundation.org/problems.html









