Abstract:
This research represents a 9 months period of research and investigative study
carried on 4 small bio-digesters, all of batch type, installed in the laboratory of the
Environment Quality Authority (EQA) of Palestine in Hebron, and one major field
bio-digester of Indian type installed in Al-Arroub Farm Complex (AFC).
The study includes measurements of feedstock's quantity and quality, initial total
solids percentage (TS%), initial volatile solids percentage (VS%), pH
changes/fluctuations versus time, and many other essential analyses like ash ratios,
moisture content (MC%), the initial total dissolved oxygen (TDO) in mg/l, electric
conductivity (EC) in micro siemens per cm and the salinity in gm/l. All these
experiments and measurements were run under ambient temperature conditions.
Conclusions and recommendations are shown in the last chapter (CH 8), they include
the lab and field results as well as the scientific discussion concerning what they
really mean.
From the study, it was found that the annual net profit (revenue) from AFC plant (as
biogas + slurry) reaches approx. 858 $ in the first year of operating the plant and
1458$ every year for the following 14 years of operation. Assuming that the service
life period of the plant is 15 years. And consequently, putting down the suitable related recommendations that coincide
with the aims of this study
