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DTS monitoring report – Ecosan Projects.by Moses Wakala submitted on 15-09-2010


Date of Visit - 28TH AUG 2010 Previous Visit - June 2010
Date completed- Feb 2010 Date it was put in use - May 2010
Status - Working well

StatusRamba Boys High school with a population of 938 Boys is a Provincial Boarding school which was selected by EPP as a pilot site for decentralized treatment plant among other sites. The DTS plant was awarded to BINLAW Construction Company who did their best it being their first job of that kind. The EPP team worked hard to ensure that the construction was according to standards and as per the pilot plans. The main works of the contractor included:

Ø Construction of 90 cubic meter biogas Digester.
Ø Construction of a six chamber Anaerobic Baffled Reactor.
Ø Rehabilitation of existing pit latrine to flushable toilet.
Ø Connection of the treated effluent to the farm

The school was previously poorly equipped with sanitation facilities in the compound and the 16 toilets were few and smelly making life so uncomfortable for students. EcoSan Promotion Documentary on Television in Kenya depicted some boys removing shirts and pullovers before visiting these latrines so as not to come out smelling to their class-rooms.

Picture showing the status of the pit Latrines in Ramba School before EPP intervention.

The latrines walls were made of rusty iron-sheets that were coming off. With EPP funding, eight toilets were rehabilitated to permanent flushable units with tiled floor. The school also did rehabilitation of the other eight latrines to equal standard with rain water harvesting. Currently, water tank has been constructed next to the urinal and water from this tank is used to flush the toilets with pour-flush method.

From the visit, one could notice the relief and comfort from the students as they visited the new facility to relieve themselves. The Bio-digester is working well and already a gas is being produced which burned when tested by the consultant. The Baffle Reactor is ok and the farm has been prepared ready for the treated effluent.

KitchenThe burners and kitchen piping has not been done. The consultant has delivered the burners in school and is organizing with the school management on the kitchen piping and fittings.

The toilets have been fitted with the gutters for rain water harvesting and the collected water is used in flushing the toilet. The two urinals are also connected to the Digester.

Picture of the eight Rehabilitated pit latrine to flushable toilet in Ramba School.

This picture below shows the Sealed Neck of the Digester. The top cover is just beside it which needs to be put on top of the neck. Wedging to prevent excess gas pressure from pushing the lid has not been done. This is urgent too. One of the plugs in the test unit manhole adjacent to the Neck is also missing. The school has fenced all the DTS plant to keep off people from unnecessary entry. The consultant is planning for a training of the teachers and students on operation and maintenance. The school need to get one grounds-man to be trained to operate the system.

Masonry tank-This picture below also shows a water holding masonry tank constructed by the school to store water for flushing the toilet. Operation instructions can be seen pinned on the wall. The system is operating well with plastic jerricans used to scope the water (about 2.5 Litres per flush). Treated effluent has not overflowed to the garden. There is a small holding tank about 30 cubic meters dug at the end of the baffle reactor before it flows to the farm.


Date of Visit - 28TH AUG 2010 Previous Visit - June 2010
Date completed- Feb 2010 Date it was put in use - May 2010 Status: working well

Lwak Girls is a Boarding school with a population of over a thousand girls. The school was chosen as a pilot site of ecosan technology due to an interest in biogas to reduce the firewood cost in school apart from achieving better sanitation. Therefore the school is very much interested in seeing the biogas produced and used in kitchen. The school has many toilets well constructed with flushing systems. Fifty toilets have been connected to the DTS constructed by COMILA Construction Company which was awarded the contract to build a 90 cubic meter Digester and A baffle reactor. The general water consumption in the school is estimated to be about 60 cubic meters per day. Flushing, washing and bathing water that is connected to the digester is about 60% of the total water. During the previous visits, there was a notable smell from the baffle reactor which from inspection was coming from the semi-treated waste from digester being pushed by the excess water inflow. By inspection, some girls were bathing from outside at night and storm water was by mistake channelled to the DTS. All these excess water connections were re-directed to a soak away pit and the foul smell has now ceased. The facility is well in use and waste is full in the digester and Baffle Reactor.

There was no gas produced from the digester from first inspection. This was as a result of a leakage at the clay seal which had not been attended to from previous visit. In this visit, training was done to the school plumper on sealing and maintaining the DTS components. Kitchen piping components were bought by the school and kitchen piping instruction given to the plumper with two burners to be fitted. The burners were delivered by the consultant to the school. A leakage in the pipe that was detected is to be rectified as piping is in process. The school wishes to have the gas also used in the bakery and requires more information on this.

This Digester neck was found leaking as a result of the clay dried and cracked. Normally, it is kept wet under water to reduce chances of cranking. All the gas had escaped through the neck and there no gas could reach the kitchen. The wedges were removed and the lid pulled aside so as to repair the leakage.

All the dried clay was removed and a better quality prepared clay put well with the plumper so as to understand the procedure of sealing the digester.

Pressing the lid tightly.

Sealing with clay.

Putting water cover on clay.

The DTS plant is doing well in operation. The school has dug a big fish pond in the garden waiting for treated effluent. So far no water has begun flowing in the pond because the school had closed.

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