The quality of treated wastewater is a necessity. Not just for irrigation purposes but to guard local people and other users. Wastewater discharge from industries may contain constituents which have heavy metals like lead, nickel, and zinc. Some metals are important while at low concentrations but they become toxic if they are consumed at higher concentrations.
Wastewater is any water that has been contaminated by human use, domestic, industrial or agricultural. Dealing with wastewater problem is a menace. This situation has overwhelmed developing countries like Kenya and affected water surface as the discharge of raw wastewater has caused environmental degradation. Kenya generates a lot of wastewater from industries and households. As at now, the country is defined as water scarce nation and it has one of the world’s lowest water replenishment rates per capita; below 1300m³. Given the low national average rainfall since December 2021 while the increasing urban population puts more demand on water consumption and proliferation of waterborne sanitation, create widespread wastewater disposal problems. And in many cases wastewater is sometimes discharged onto open ground and small streams, creating ponds of foul smelling stagnant water. This unethical discharge of wastewater results to serious health problems.
Raw sewage is characterized with small particles and materials that are floatable and visible and also that are settle able. Strong foul smell released are from domestic wastewater such as rotten egg, flesh, vegetables, fecal, medicinal, due to the biochemical degradation of these organic materials. Sewage is the wastewater released by local members, businesses and industries in a community. It is characterized with 99% of water while the remaining percent consists of wastewater containing dissolved and suspended solid material.
The number of infections of COVID-19 was increasing rapidly in every part of the world. Countries characterized with high population, poor hygiene and sanitation conditions were mostly at risk. The existence of such a connection between sanitation status of a country to the level of COVID-19 infection rates was really important. The emphasis on hand washing with soap and clean water was just but a mere dream. Wastewater and fecal sludge discharged into water bodies without any level of treatment made it hard for people to access clean quality water.
Over the years, waste management and treatment has been the work of the local authorities. Now the National government, county governments, communities, private sector, non-governmental organizations, is involved in eradicating and managing the menace situation of wastewater discharge. Currently, Water Resources Management Authority (WRMA) and National Environmental Management Authority (NEMA), issue discharge permits. The main aim of wastewater treatment is to remove as much of the suspended solids and materials before the remaining water goes back to the environment. Kenya’s vision 2030 is to relocate Dandora dumpsite as well as develop and establish sustainable waste management systems in Eldoret, Nakuru, Kisumu, Nairobi, Thika and Mombasa. In 2015, a National Waste Management Strategy was formed. Also in 2017, the ban of polythene carries bags due to its non-biodegradable character. The ban yielded a positive impact towards minimizing solid waste generation. The issue of sanitation and waste discharge should be given priority and it should be an individual approach.




