Air pollution in Belgrade exceeds safe WHO limits by up to five times, creating a public health crisis that raises rates of asthma and cardiovascular diseases. Due to the lack of soil for urban tree planting, the city implemented LIQUID 3 in 2021, 600-liter tanks with local microalgae that act as photosynthetic biofilters. This article analyzes the system's efficiency from a visual epidemiology perspective, modeling its capacity to reduce pollutants and its potential impact on respiratory morbidity.
Efficiency modeling: CO2 absorption and particle removal 🌿
Field data show that a single LIQUID 3 tank fixes CO2 between 10 and 50 times faster than a mature tree, achieving a removal efficiency close to 50% in its immediate surroundings. To visualize this, we generated a 3D map of the Stari Grad area where the units operate. The computational model reveals a localized reduction of PM2.5 and PM10 particles, with a capacity equivalent to two 10-year-old trees or 200 square meters of grass. The freshwater microalgae used, selected for their resistance to extreme temperatures and growth in tap water, require maintenance every 45 days, making them a viable solution for harsh environments where traditional forestry fails.
Impact on public health: Can a tank save urban lungs? 🫁
From an environmental epidemiology perspective, LIQUID 3 not only purifies the air but also functions as urban furniture that integrates a public bench, encouraging people to linger in areas previously avoided due to pollution. While a single tank does not solve a metropolis's crisis, its strategic implementation in critical points could reduce the incidence of acute respiratory infections and chronic diseases. The generated biomass, reusable as natural fertilizer, closes the ecological cycle. This model, although incipient, offers a visual and tangible tool for urban planners and public health officials to rethink pollution mitigation in densely populated cities.
Can prolonged exposure to atmospheric pollutants in Belgrade, such as those Liquid 3 aims to mitigate, generate quantifiable changes in visual acuity or the incidence of eye diseases in the population?
(PS: public health graphs always show curves... just like ours after Christmas)