This charger is intended to recharge the phone's battery with water.
The PowerTrekk system is a lightweight, brick-sized fuel cell charger powered by the good old H2O.
To charge the phone, users simply pour water into the tray, place a PowerPukk cartridge in the tray, cover the system, and then connect a phone with a USB cable.
Mineral water, salt water or dirty water from streams / puddles (as long as it does not contain sediment) are okay to power the device.

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Abstract- This paper reports the potential of watermelon seed as a natural coagulant for water
treatment. It was aimed at identifying watermelon seed as a possible replacement for alum and
other synthetic polyelectrolytes in treating water. Laboratory scale studies using jar test
experiments were performed on medium turbid water to determine the effect of dosage, pH
stirring time and speed on coagulation. Results obtained showed that at dosage of 0.1g/L, pH of
7.0, stirring time of 8 minutes and mixing speed of 100rpm, optimal removal of t ....etc

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softening of water ppt

Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water is more compatible with soap and extends the lifetime of plumbing. Water softening is usually achieved using lime softening or ion-exchange resins. ....etc

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The problem

The principal objective of wastewater treatment is generally to allow human and industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment. Irrigation with wastewater is both disposal and utilization and indeed is an effective form of wastewater disposal (as in slow-rate land treatment). However, some degree of treatment must normally be provided to raw municipal wastewater before it can be used for agricultural or landscape irrigation or for aquaculture. The quality of ....etc

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STUDENT NAME:JULIUS J. NYINDA
JULIUS J. NYINDA

SUPERVISOR: N.G. NZOWA

INTRODUCTION
A water meter is a device that is used to measure the volume of water usage.
A prepaid water control circuit system is a control mechanism that allows water usage when there is a certain amount of prepaid units in the control circuit system and terminates water usage when the units are over.
In such a system, a customer purchases a separate prepaid credit card with values of credit units encoded in it.
The un ....etc

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