Rainwater collection method, rainwater collection apparatus, and drinking water production apparatus

摘要

PPROBLEM TO BE SOLVED: To provide an effective and convenient rainwater treatment device that divides rainwater at the beginning of rainfall from rainwater during rainfall, efficiently removes soil such as dust, oil, sands, etc. from both rainwater, send purified rainwater to a rainwater reservoir, and also purifies the initial rainwater so as to collect as much rainwater as possible. PSOLUTION: The system allows mixtures like sands, etc. heavier than water not removed by a primary treatment device equipped at an inflow tube, to settle in an inflow tank, and drains dust, etc. lighter than water to a drain tank through an overflow tube. Purified rainwater collected in a stay tank is sent to an upper water collection and treatment layer at ground surface for settlement and filtration for the purpose of further purification, and then sent to the rainwater reservoir via a permeation tube and a water collecting tube. PCOPYRIGHT: (C)2004,JPO