Rainfer: Fertilizer production using rainwater as raw material

Abstract

Shortly after the rain falls to the surface of the soil, the water flows into the water body or seeps into the ground without being optimally utilized. The low chemical and physical components are the main drawbacks of rainwater utilization. The raw material for fertilizer in this research is rainwater, so we call it rain fertilizer (rainfer). The main components of the additive are Bryophyta, sp, monosodium glutamate, hydrated lime, sodium chloride. They are added to enrich the physical and chemical components. The rainfer reactor is cylindrical with a maximum capacity of 70 liters. As much as 35 litres of rainwater plus additive is put into the reactor and stirred using a pump for 15 minutes until homogeneous. Let the mixture sit for 7 x 24 hours. The results showed that the addition of additives succeeded in increasing the parameters of TDS and conductivity respectively by 98.68% and 99.03%. The concentration of nitrate as nitrogen increased by 96.54%, from 1.13 mg/L to 32.67 mg/L. The final pH was 7.78, total P was 78.47 mg/L, total K was 0.03 mg/L, and heavy metal Cu was 0.06 mg/L. The level of toxicity based on the germination index value was 70.16% compared to the control, which is equivalent to mature and stable compost. The addition of additives can improve the quality of rainwater based on physical, chemical, and non-toxic parameters.