Q.Can We Compost In 1. General BPA Buckets? 2. HDPE Buckets That Are Not Food Grade (eg; Paint Buckets )?
Can we use virgin PP buckets for growing plants? and for composting also? Can we use 20 litre buckets for the above mentioned? Are curd buckets,aquaculture buckets,animal husbandry buckets all food grade and safe for growing plants and composting?

Certified GKH Gardening Expert
You can purchase low cost buckets at the local home improvement store. Do not use any buckets that held toxic chemicals or materials. It's generally recommended to avoid BPA. The label should say if the container is safe for food storage. Many restaurants will give away food grade buckets.
https://www.ga,rdeningknowhow.com/special/containers/growing-vegetables-in-buckets.htm