We are planning on buying some land and getting a tiny house to live in and one of the things about it is that it will be totally off-grid. We are planning on saving money etc , by getting a composting toilet.

If you're like most people, chances are you don't really know 
what a composting toilet is or how it works. If your initial reaction to
 the idea is one of disgust, then read on, because we're about to shed 
some light on the subject! Many people think of a composting toilet as 
something similar to a port-a-potty or an outhouse. Contrary to this 
unpleasant image, composting toilets are very clean and sanitary, and 
they make a great alternative to traditional fixtures. In this article, 
we'll explain how composting toilets work, and why they are a superior 
waste management solution that you just might want to consider for your 
home.
The biggest misconception surrounding composting toilets is 
that they smell. In reality, nothing could be farther from the truth! If
 you purchase the right unit, it will be 100% odor free. Good composting
 toilets use a venting system to maintain odor free operation. A 2" or 
4" vent stack must be installed to run vertically up from the toilet and
 out the roofline of your home. The vent stack is designed to draw air 
downward through the seat and then up and out the vent. This maintains a
 partial vacuum inside the unit and ensures that no odor can enter the 
bathroom. In some units, there is also a small fan assembly to assist 
with airflow.
There are many varieties of composting toilets to 
choose from, and contrary to popular belief, not all of them are 
waterless! There are many composting systems available that use water 
flushing toilets. These types of units are called central systems, and 
they are made up of a central composting unit (picture a big box) that 
sits in the basement or lower level. A separate, more 
traditional-looking toilet fixture is installed in the bathroom and 
connected to your water pipes to provide flushing liquid.
The 
finished product from a composting toilet is, of course, compost. While 
the uninitiated might have concerns about compost coming from human 
waste, there is no need to worry. Provided that you followed the 
manufacturer's instructions, the finished product from your composting 
unit will be clean and non-offensive. In fact, it will look and smell 
just like any other normal compost you might purchase from a nursery or 
garden center.

When shopping for a composting toilet, be sure to 
look into the product's certifications. Has it been tested to comply 
with national or international standards for waste management systems? 
Within North America, composting toilet systems are tested to NSF/ANSI 
Standard #41. To date, only two manufacturers of composting toilets have
 successfully had their systems tested and certified to comply with this
 standard.
The first is Clivus Multrum, a manufacturer of 
composting systems designed for use in parks and outdoor facilities. The
 second is Sun-Mar, a Canadian manufacturer of composting toilets 
designed and approved for residential use. It may be helpful to note 
that, for consumer's protection and safety, the NSF only certifies 
composting toilets that are odorless and that produce compost with fecal
 coliform that does not exceed 200 MPN per gram. In other words, if you 
use the unit correctly, the finished compost is sanitary and it will not
 make anyone sick. For more information, visit the 
NSF's website.
Traditional
 toilets use as much as 30% of the average household's water 
consumption. As we move through the 21st century, composting toilets 
will become an increasingly popular choice for those who need to 
conserve water, or who simply wish to save money on expensive water and 
sewer costs. Furthermore, composting toilets are no longer the ugly, 
awkward fixtures of the past. Modern systems are sleek and contemporary,
 and blend perfectly in a residential setting. If you're like other 
Americans looking for ways to save money or minimize your ecological 
impact, now may be a good time to consider a composting toilet system 
for your home.