Abstract
Climate changes are nowadays reality and affect all aspects of everyday life. One of the places where these changes influence the society the most is the Brazilian Ceará region and Jaguaribara basin that suffer long-lasting, devastating drought cycles. They have a dramatic negative impact on local economy, forcing change in business models. This work presents the valorisation of wastes and residues from local fish, prawns, and the vegetable-cultivation industry via biogas production forced to adapt to these new circumstances. Along a single year, as much as 189.74 tonnes of wastes and residues can be processed by the biogas production facility, producing as much as 94 GJ of cooling energy and 1 tonne of biofertiliser monthly. Even for such a small biogas production facility, the NPV is positive already after 11 years; its IRR is 6.2%, and accumulated ROI for 20 years of operation is as high as 77.8%. This work demonstrates that a valorisation of industrial wastes and residues via biogas production is a feasible solution for a specific industrial scenario addressing new socio-economic challenges for the particular enterprise.
Highlights
The methodology section presents technological, economic assumptions compiled together with data regarding a production of commercial economic assumptions compiled together with data regarding a production of goods of PISCIS with information about feedstock available for the biogas production in a commercial goods of PISCIS with information about feedstock available for the biogas new anaerobic digestion facility
3, 482 the kg/day overall volume of wastes available biogas product was estimated at the 2level with a dry wastes available for biogas product was estimated at the level of kg/day with a dry matter content of 48.7%
The potential implementation of the proposed action drives to the reduction of yearly burden on the environment with organic waste in the amount of 189.74 of tonnes yearly and production of 94.08 GJ of cooling energy and 1.05 tonnes of biofertiliser monthly
Summary
The most affected region of Brazil is Ceará, the Northeast state regularly affected by consecutive years of insufficient rainfall This drives to the frequent serious water limitations including severe situations such as a declaration of a state of emergency in some cities, including the state capital, Fortaleza. A significant water shortage in the entire region and inadequate water management together with a limited rainfall and high evapotranspiration caused by the elevated temperature around the year have a significant influence on the local business environment This in turn has a direct impact on the local communities as a significant part of the population is directly employed in the agriculture and fish farming areas. To answer these needs and to mitigate undesired climate changes, in 2003, a 6700 Mm3 [4] Castanhão reservoir was commissioned
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