biological purification system for lake water using floating cork plates

biological purification system lake water using floating cork plates absorption phosphates nitrates roots purification-bioremediation often organic matter accumulated leaves animal excrement inefficient filtration aeration systems treat receiving quantity material leads lakes dark waters nature-based solution which being used some lisbon islands consisting structures ecological guarantee healthy balance enabling growth plants surface promoting increase oxygenation improvement chemical quality ensure recycling excess nutrients recreating environment similar wetlands such estuary pennyroyal yellow iris strapwort soft rush can contributing well promotion urban biodiversity