Compost Toilets: Part 1

Written by Alberta


A composting toilet is a device that collects and composts human waste, allowing you to convert unwanted by-products into valuable material for your lawn or garden. While serving the same purpose as a traditional private bathroom or restroom, this system is entirely different and offers several environmental benefits. Composting toilets are an effective waste disposal solution for homes, mobile homes, and boats without a grid connection. At the same time, they can be the first choice for people who want to minimize their impact on the environment. Most composting toilets are also known as “dry toilets” because they don’t flush and rely on waterless composting.

Composting toilets breaks down human waste through anaerobic or aerobic digestion. Aerobic digestion produces compost: Microorganisms break down organic materials and produce a compost-like product that can be used to make compost or fertilizer. The system is safe, although not all pathogens are eliminated. The finished product can also be sent to a secondary system, often for another round of composting, to provide additional composting time to eliminate pathogens further.

Anaerobic digestion produces methane (often called biogas) and organic waste that can be used as fertilizer. In this case, decomposition occurs in a sealed chamber, a fermentor. The biogas resulting from this process is considered a renewable energy source often used as cooking gas or heating. A waterless composting toilet that uses aerobic digestion requires additional materials such as sphagnum moss, coconut fiber, sawdust, wood chips, or shredded leaves to facilitate the process. The most commonly used carbon additive is sawdust, which is inexpensive and easily accessible.

Waterless compost toilets can reduce reliance on traditional plumbing. As a result, you don’t have to worry about leaks or pipeline management. They reduce the amount of wastewater that is produced. This saves you up to 35 gallons (130 liters) of wastewater per person per day.

Using a composting toilet helps minimize environmental impact. One of the environmental benefits of composting toilets is minimal water pollution by reducing the amount of wastewater in your home. Cleaning wastewater contributes to air pollution, requires high energy consumption, and causes additional greenhouse gas emissions.
By reducing water consumption, you also save money in the long run. They produce compost that can stimulate plants and improve soil properties. Compost contains a variety of micronutrients and elements, such as nitrogen, phosphorus, and potassium, which are essential for plant development and soil balance. The best compost toilet systems are a cost-effective solution for situations where no septic or plumbing systems are available. Because these systems come in various sizes and shapes, they can meet the needs of various residential solutions, from off-grid homes to motorhomes and boats.

1) Porta Potti 92306 White Thetford Corp
Porta Potti 92306 White Thetford Corp features an ergonomic, battery-operated flush seat height. It is considered one of the best portable composting toilets on the market. The modern design and curve separators allow you to manage waste effortlessly and safely, while the storage tank capacity supports more than 50 discharges during a single fill. It is suitable for group use and requires less maintenance time than comparable products in the same price range. The toilet has a built-in tank level indicator that helps you understand when to empty the tank.

2) Thinktank Composting Toilet The Thinktank composting toilet aims to solve any major problems homeowners have with composting toilets. The system has a separate air inlet and hermetic exhaust pipes to ensure that odors do not pass through. This composting toilet is easy to clean and uses biodegradable bags to contain waste. Users don’t need to flip the handle or add carbon additives to maintain functionality. Thanks to its sealed containers, the toilet system does not attract pests or insects.

3) Sun-Mar GTG Toilet The Sun-Mar GTG toilet is more economical than many other versions if you need a medium-capacity toilet. It is designed for domestic use by an adult or for seasonal use of up to three people and plugs into a standard 110-volt power outlet. As a rule, you should add a cup of bulk material daily for each person. The GTG model is best suited for portable toilets and small spaces. These toilets are very popular due to their small size, easy installation, and function comparable to a cassette toilet. However, it is recommended to take precise measurements of the space before purchasing, as the manufacturer does not accept returns of this product.

4) Separate Villa 9215 Detached Villa 9215 AC/DC separates urine and solid waste, reducing odour and minimizing the amount needed for handling.
This composting toilet has a fan with AC/DC adapters. A screen rotates and covers the solid waste container at the same time as you sit down. For easy cleaning, you can use a biodegradable bag that is placed inside the container. It looks and “feels” more like a standard toilet since there’s no need to add filler material to control odours and speed up the composting process. A child seat is also available and can be purchased separately.

5) Nature’s Head Freestanding Composting Toilet The Nature’s Head self-contained composting toilet is reliable and easy to use the system. It has a side-mounted “spider” handle to remove solid waste in the tank and divert urine to an easily removable container. The bin can accommodate two people who use it full time and should be emptied every four to six weeks (approximately 80 uses). However, the urine container should be emptied every other day.

An electric fan draws fresh air and expels odours, maintaining the quality of the air in the bathroom. The fan operates on 12V power, which can also be converted to 110V with a kit sold separately.

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