Abstract
This paper provides the analysis of results of biogas and methane yield for: maize silage (MS), pig slurry (PS), waste potatoes (WP) and sugar beet pulp (SB). The results show that maize silage is the most energy substrate (among the samples tested), providing a cumulative methane yield from 595 to 631 m-3 Mg VS (VS – volatile solids). The study was carried out in a laboratory scale using anaerobic batch reactors, at controlled (mesophilic) temperature and pH conditions. This paper is Part I of a report of an experiment carried out, in the laboratory scale and in the commercial scale (in parallel) The purpose of the experiment was to verify differences in biomethane yields of the same materials in the two scales. Moreover, this paper is an introduction to a presentation of the method to determine the biochemical methane potential correction coefficient (BMPCC), the details of which will be explained in Part II.
Highlights
Intensive development of agriculture contributes to increased volumes of organic waste being generated
For the sugar beet pulp, the values of total solids ranged from 23.33% (6SB) to 23.88% (1SB), which is in conformity with the literature data [11]
Volatile solids for maize silage ranged from 93.88% (6MS) to 95.15% (1MS), which is comparable to the literature data [13]
Summary
Intensive development of agriculture contributes to increased volumes of organic waste being generated. Various types of waste matter disposal technology are often based on anaerobic digestion (AD), which is carried out in biogas plants. To improve the biogas plants efficiency, a substrate in the form of organically rich vegetable material is added [1]. For this purpose, specific targeted plantations are established, mainly of maize and grass for silage [2]. This paper presents only the laboratory test results as an introduction to a wider discussion of issues connected with the reasons why differences were observed between the laboratory and technical process efficiencies, and with the ability to predict and assess such differences
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