The Question of Biosolids
(Local news) (Science, sociology, and Medicine)
On a statement made on the WSET website
I made the following comment:
"I can appreciate peoples concern over the human waste issue. Thirty years ago I lived in South Korea were unproccessed human waste was used almost exclusively for fertilizer. The stench was terrible. We were not allowed to eat the vegetables because of contamination. But that was 30 years ago. Today biosolids are processed and a resource we should use. Fertilizer prices are going to increase with the fuel that is used to produce them. And from what I have read there is no longer a stench or the threat of contamination with biosolids. "
I was in error in saying there is no longer a stench. A look at the EPA website reveals:
"Once the wastewater reaches the plant, the sewage goes through physical, chemical and biological processes which clean the wastewater and remove the solids. If necessary, the solids are then treated with lime to raise the pH level to eliminate objectionable odors. The wastewater treatment processes sanitize wastewater solids to control pathogens (disease-causing organisms, such as certain bacteria, viruses and parasites) and other organisms capable of transporting disease. "
There is still an odor issue as further stated by the EPA. However, I still support the use of biosolids as a natural way to fertilize and its other uses. To read more go to the EPA faqs on this issue.