WWTPs	wastewater treatment plants
AnD	anaerobic digestion
MKP	multidimensional knapsack problem
AnCD	anaerobic co-digestion
ACO	Ant colony optimisation
GA	Genetic algorithm
PSO	Particle swarm optimisation
GUI	graphical user interface
CMAES	covariance matrix adaptation evolution strategy
DE	differential evolution
ANN	perceptron artificial neural network
SGOAs	how stochastic global optimisation algorithms
CO	combinatorial optimisation
EA	evolutionary algorithms
COD	Chemical Oxygen Demand
TN	Total Nitrogen
C/N	Carbon to Nitrogen ratio
CBT	Consorci Besòs Tordera
GIS	geographical information system