## 2 Materials and Methods
### Experiments About Kitchen Waste Recycling as Fertilizer for Plant Growth
#### 2.1.2 External Investigations  
To supplement our experimental data, we extracted and standardized information from 20 additional published studies (Table 1). Together, these datasets formed the comprehensive database for modeling purposes.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Nr** & **Treatment** & **Season** & \begin{tabular}{c} **Growth Time** \\ **(Months)** \\ \end{tabular} & **Plant** & **References** \\ \hline \multirow{4}{*}{1} & (1) Effective Microbes 1 M Incubation, & & & & \\  & pelleted; (2) Anaerobicly Digested, & & & & \\  & centrifuged; (3) Anaerobicly Digested, & & & & \\  & centrifuged, dried; & & & & \\ \hline \multirow{4}{*}{2} & (1) Dried, pelletized; (2) Effective & & & & \\  & Microbes 1 M Incubation, ground; & & & & \\  & (3) Effective Microbes \(\times\)2 1 M & & & & \\  & Incubation, ground; (4) Sterilized at & & & & \\  & 70 \({}^{\circ}\)C, dried; (5) Stillage added, & & & & \\  & Anaerobicly Digested, centrifuged; & & & & \\  & (6) Fish waste, Stillage added, & & & & \\  & Anaerobicly Digested, centrifuged & & & & \\ \hline \multirow{4}{*}{2} & 3 & FW Compost 340, 680, 1020 & Warm & 0.5, 1, \& 1.5 & Lettuce & [25] \\ \hline \multirow{4}{*}{4} & FW 1.1, 1.2, 1.3; Organic Fraction of & & & & \\  & MSW 1.1, 1.2, 1.3; FW 1, 2, 3 digested; & & & & \\  & Organic Fraction of MSW digested & & & & \\ \hline \multirow{4}{*}{5} & Green Waste compost in different ratios & NA & 2.73, 3.0, 3.63, \& 9.37 & Oat & [27] \\ \hline \multirow{4}{*}{6} & Garden Waste compost in different & NA & 0.75, 1.5, 3.0, 9, \& 13 & Ryggrass & [28] \\  & ratios & & & & \\ \hline \multirow{4}{*}{7} & Composted municipal solid waste 1.1, & & & & \\  & 2.1, 2.2 & NA & 4 & \
\begin{tabular}{c} Ryggrass and \\ wheat \\ \end{tabular} & [29] \\ \hline \multirow{2}{*}{8} & Green Waste Compost 1, 2 & NA & 12 & Oat & [30] \\ \hline \multirow{2}{*}{9} & Compost 1.1, 1.2, 2.1, 2.2 & NA & NA & Oat grass & [31] \\  & & compost 1.1, 1.2 & & & \\ \hline \multirow{2}{*}{10} & Fertilizer granulate obtained from & & & & \\  & biogas digestate in different ratios & NA & 12, 24, 36, \& 48 & Grass & [33] \\ \hline \multirow{2}{*}{11} & Compost 1, 2 & NA & 1 & & \\  & 100\% FW digestate; 10\% FWD, 90\% & & & & \\  & fertilizer; 50\% FWD, 50\% fertilizer & & & & \\ \hline \multirow{2}{*}{14} & FW + yard trimmings + paper; & & & & \\  & FW + wood waste + sawdust & Warm & 180 & Grass & [36] \\ \hline \multirow{2}{*}{15} & Mixed DD, LD, and MIN &
\begin{tabular}{c} Warm and \\ Cold \\ \end{tabular} & 62 \& 64 & Lactuva sativa & [37] \\ \hline \hline \end{tabular}
\end{table}
Table 1: Summary of treatment methods and other conditions of selected studies for this work.  
Table 1 summarizes key study variables, including treatment types, seasons, growth durations, and plant species. Treatments involved various composing and digestion processes applied to crops, such as ryegrass, lettuce, oat, winter wheat, corn, Kai choy, and barley. Growth periods ranged from 0.5 to 180 months, covering both warm and cold seasons. Some studies also evaluated combinations of FW, garden waste, and municipal solid waste for their effects on plant growth and productivity.