The justification of this is overload on sewage treatment facilities by stuff that would otherwise go into the trash.
Ground up stuff adds biochemical oxygen demand (BOD), which is what sewage treatment plants remove. The more BOD in the waste stream, the more sewage treatment plant is required for adequate treatment. Ground up stuff adds to sludge volume also. Sludge has to be digested and finally dried. Volume is a problem. It is possible (note that I didn't say "theoretically" or "readily" possible) to so overload a sewage treatment plant with BOD from a particularly strong source, in one case a chicken slaughtering plant, that the effluent from the treatment plant is way too strong; it may still have a substantial BOD. Stinks. Solution in that case was pre-treatment at the chicken plant. You may not be able to do that with domestic kitchen waste unless it is really loaded up with blood or meat waste. Grease inhibits the bacteria that remove BOD. But that is why. >Message: 7 >Date: Wed, 18 May 2011 16:55:03 -0700 >From: "Jerry Herrman" <jer...@san.rr.com> >Subject: [MBZ] Garbage Disposers Banned > >So, we have a rental and as we are leaving our house yesterday evening to >attend a meeting, the resident calls to say that the kitchen sink is clogged >up. Being booked solid for the next 24 hours or so, I call a plumber to take >care of the problem. He calls after doing the job to say that sweet potato >peelings were run through the garbage disposer (GD) and bunched up in the "J >bend" causing the blockage. He removed and replaced the trap, and took out >the peelings. He proceeds to say that this house was built before the use of >garbage disposers, and is not designed to have a GD. He recommends removing >the disposer and restoring the original configuration under the sink. I am not >inclined to follow his reommendation, believing it to be a desirable feature >for residents. He says that NYC and other cities have banned garbage >disposers. > >My question: Why have some cities banned GD's? > >Jerry >1982 240D >Does not run on potato peels > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
