Special Issue on the Intensified Conversion of Organic Waste into Biogas

Martins, Gilberto

doi:10.3390/app12073573

Cited by 1 publication

(1 citation statement)

References 15 publications

(23 reference statements)

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“…On the other hand, sludge from municipal wastewater treatment plants has high moisture and comes in various physical forms, and also the conductive materials from these sludges in anaerobic digestion processes can improve methane production by reducing lag phases, contributing to a more stable operation of the systems [14]. The properties of sewage sludge depend on the type of sewage and the treatment technology used [15], and the addition of water treatment sludges may increase the overall efficiency of the process by supplementation of necessary trace elements [16]. These improvements have no adverse effect on the combustibility of sludge [17].…”

Section: Introductionmentioning

confidence: 99%

Sludge Management at the Kraków-Płaszów WWTP—Case Study

2022

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Municipal wastewater treatment plants are good examples of facilities where the concept of a circular economy model can be effectively implemented by the recovery of energy as well as secondary and natural materials. That is why anaerobic co-digestion has become one of the most appealing renewable energy pathways and takes a key position within sludge-handling processes. This research looked into the feasibility of the utilization of water sludge from a water treatment plant in anaerobic co-digestion with sewage sludge. The experiments confirmed that anaerobic digestion of sewage sludge together with water sludge significantly improved fermentation gas (biogas) production. The best results were observed when water treatment sludge constituted 30% of the mass of sewage sludge (as volatile solids, VS). At this ratio, approximately 20% more biogas was produced in laboratory experiments compared to the biogas production from sewage sludge only. The results, once confirmed on a semi-technical scale, will help to develop a sequence of processes which would enhance biogas production. Both the technology and the final product offer a comprehensive solution for waste generated at water and wastewater treatment plants. The innovative approach allows for the use of various waste streams and their combined processing following the principle of the circular economy.

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Section: Introductionmentioning

confidence: 99%