Start Date: 2014-04-01
Completion Date: 2014-09-30
Technology Used:
The ecological composting latrine is a simple, low-cost sanitation facility, with proven record of efficacy by past sanitation projects implemented by Etta Projects as well as other institutions in Bolivia such as Water For People and INCADE. The ecological composting latrines are built using locally available materials, and the beneficiaries provide much of the materials and labor.
The ecological composting latrine is built above ground and does not require permanent plumbing or water. The bathroom is built on a double vault system, with one chamber in use at any given time. A toilet seat with two holes allows for separation of urine from fecal matter. Fecal matter enters the disposal chamber where it is contained and decomposes; urine is captured separately. When this chamber is full, the toilet seat is moved to the second chamber and fecal matter in the first chamber begins the composting process. After each use of the latrine, dry material (ash or lime) is added to prevent odor, repel bugs and start decomposition. Toilet paper can be thrown into the latrine and will not disrupt decomposition. The process of alternating its usage and excavating compost must be maintained for the toilet to function properly. This model eliminates risk of fecal matter leaking into ground water.
The components of the eco- latrine include a double-vaulted base, superstructure, steps, and separate urinal and toilet. The base of the latrine consists of two separate sealed vaults with cement doors on the back side. These doors can be opened to remove the compost generated from regular bathroom use. The inside walls of the vault are coated with Sika paste, which is a common waterproof sealant used in Bolivia. Compost builds up in the vault, and is removed by opening the vault doors, which are then be closed and re-sealed with soft cement. A more detailed description with the measurements of all the latrine parts can be found in the attachment section. Also included is a PowerPoint presentation with photos of completed latrines.
Families have an option to build the outer structure from materials they have on hand or make a financial contribution to the project which will be used to purchase bricks for the superstructure. The superstructure encloses the toilets and urinals, and sits above the vault. Once the families have completed the construction of the walls, the families provide their own roof. Entry steps are built from masonry brick covered with cement paste for reinforcement and aesthetic appearance. Families often choose to decorate the exterior of their bathroom structure with colorful paint, decorations and plants.
Some families choose to install a hose buried underground to allow liquid waste to run into the ground at a safe distance. Others collect liquid waste in a bucket and dump it in an appropriate disposal site or leave the urine in the sun for a few days so that it can be used as pesticide for certain vegetation.
The eco-latrine requires modest on-going maintenance for proper operation. Dry material must be added to the vault to facilitate composting. Ash is the most widely used dry material because it is readily obtained from the wood stoves used in Bolivia. Other maintenance responsibilities include: switching the toilet from one vault to the other (usually done every 6 month to a year); stirring waste in the vault to enable proper composting; removing compost and sealing the vault for a new composting cycle. These are simple tasks and the cost is minimal.
Our experience has proven the ecological bathroom to be ideal for Eastern Bolivia. First the hot temperatures in this area allow for faster decomposition of the fecal matter. Second, because the area has shallow ground water and is prone to flooding, typical pit latrines can lead to many problems. The shallow latrines contaminate ground water and they overflow easily spreading contamination. Another benefit of the ecological latrine is that it allows families to use decomposed fecal matter for productive purposes, providing incentive for its adoption in agrarian communities. Our current projects are just reaching a point that families are emptying their vaults and some have chosen to use the compost in flowerbeds and crops. Project leaders continue to collaborate with similar organizations working in sanitation, such as INCADE and Water For People, to develop practical uses for by-products of the eco-bathrooms, such as selling compost fertilizer and growing flowers to sell commercially. We would like to see more people take advantage of the compost; however this is a slow process that takes time to be widely accepted.
There are additional environmental benefits to the ecological latrine. To accommodate the region’s high water table, the design has a sealed, above ground vault that prevents waste from escaping into the environment. This has a positive impact on the community drinking water. Less waste in the water reduces bacteria transmission, which will result in better health for children and adults in the community. Overall, this project has demonstrated that the ecological latrine is an effective and low-cost solution to rural sanitation problems and offers special incentives to people in agrarian communities.
Phases:
The project will be implemented in 5 phases:
Phase I: Organization
Phase II: Mobilization
Phase III: Training
Phase IV: Construction
Phase V: Evaluation
Please review Appendix V that shows the detailed calendar of each phase.
Community Organization:
The rural village of Montegrande is located in the 8th District of the Municipality of San Pedro, approximately 150 kilometers north of San Pedro, the capitol of the Municipality. The community is found in the Integrated North of the Department of Santa Cruz in Eastern Bolivia. Montegrande has a total population of approximately 165 people. Families live along a dirt road that runs through the center of the village. There are a total of 33 families that live at 24 households; most homes are made of wood and have thatched roofs and mud floors.
People from Montegrande come from diverse backgrounds. Although Spanish is the most common dialect spoken in the village, most people also speak either quechua and aymara.
The land surrounding Montegrande is extremely fertile and is characterized by a flat topography. Soy, rice, sugarcane and corn are the most common crops grown in the region. Some people also breed cows, pigs and sheep. The majority of the population works in agriculture.
Community members from Montegrande have proven a willingness to get involved in the project. Local leaders began its relationship with Etta Projects in 2011 by advocating for safe, reliable water. Etta Projects, with support from the Laird Norton Family Foundation and in partnership with the local municipality and Water For People, implemented a water system and helped establish a five-member Water Committee trained in installation, use and maintenance of the water system.
In order to prepare for a WASH program in Montegrande, Etta Projects conducted a needs assessment. During the assessment, we consulted the mayor, OTB President, water cooperative, School Board, and community families. We learned that currently households' current sanitation situation is made of shallow pit latrines that pose a wide variety of health risks.
The demand for the ecological latrine project in the community was raised from the following efforts:
• workshops and home visits with the community to analyze the problems of sanitation
• interviews with community leaders explaining different techniques for disposal
• Families' firsthand knowledge of the benefits of the ecological composting latrine from prior sanitation projects achieved by the municipality in neighboring communities
• After the Municipal Assembly was held in the district to prioritize and validate demand, the Mayor's Office established a budget towards their contribution of the project.
Government Interaction:
Over the past years, the local municipality has connected with organizations like Etta Projects, Water For People and INCADE to improve education, water, sanitation and health. In 2010 the Municipality of San Pedro was one of the first municipalities in Bolivia to form a Department of Water & Sanitation. Etta Projects will team with the Department of Water & Sanitation to build the latrines and implement the hygiene education program.
The Department of Water & Sanitation has been improving sanitation using the ecological composting latrine model for the past three years. The department has agreed to take an active role in the project by making a significant financial contribution to both the construction of the latrines and the education component and by offering technical support to the project as well as co-facilitating the hygiene promotion component. Municipal representatives will also support the monitoring and evaluation of project results. Etta Projects' office is approximately six hours from the isolated village making frequent visits to Montegrande difficult and costly. The municipality's active participation is necessary for this project to be successful.
By working alongside the Municipality of San Pedro and its Department of Water & Sanitation, people from Montegrande will gain further knowledge in how to develop projects and secure government resources. Local leaders will have the skills to continue to make a meaningful impact for years to come.
Ancillary activities:
Other Issues: