Evaluation of agricultural non-point source pollution control technologies based on analytic hierarchy process

According to the technical characteristics of agricultural non-point source pollution prevention and control in China, an index system of 14 evaluation indexes including economic benefit, environmental benefit and technical applicability was established. Combining the index system with the analytic hierarchy process (AHP), an agricultural non-point source pollution prevention and control technology evaluation system based on AHP was established. By combining the weight of indicators with the score of experts in relevant fields, the technology was comprehensively evaluated to determine the level of technology. The technology evaluation method was applied to evaluate 6 agricultural non-point source pollution prevention and control technologies in 3 categories. It revealed: the evaluation levels of nutrient loss control technology and ecological interception technology for bioactive carbon were neutralization and good respectively; the pollution control technology of microbial fermentation bed of corn straw and UASB+SBR treatment technology were rated as good and medium respectively; the treatment technology of anaerobic-soil purification bed and anaerobic-falling water oxygenation-contact oxidation-artificial wetland were rated as medium. The technical evaluation method is applicable to the comparison and screening of different single technologies in the prevention and control of different types of agricultural non-point source pollution.