Lodo de estação de tratamento de água e sua utilização em cerâmica vermelha: um estudo de composição de custo

Abstract

The treatment that raw water goes through to become drinking water involves various processes and produces a solid residue known as sludge. The Water Treatment Plant (WTP) considers the allocation of this generated waste one of the main problems in the process. The lack of treatment and improper disposal of this waste creates environmental and health problems, meanwhile the recycling of the same leads to benefits such as increased life spam of landfills, reduction it their deposition into water bodies and minimal disposal costs. There are researches that validate the use of residual sludge from water treatment plants in the industrial production processes, like the ones of red ceramic, more specifically, the production of bricks. This study analyzed the economic viability of using the sludge originated from water treatment, as part of the raw materials used in the production of bricks in brickworks of red ceramic. To this end was gathered bibliographical information related the water treatment sludge and its use in red ceramic. The methodology adopted was data collection through bibliographic research regarding the process of using this waste in the production of bricks and applied to the cost analysis for the sludge incorporated into three companies in Jataizinho-PR. It was concluded that such use leads to a reduction of 10% in the clay mineral consumption and a reduction of up to 5.8% in the costs related to transport depending on the company, and that this use does not imply spending on the treatment of this sludge for ceramics.