Millions of litres of pigs urine is collected every year across UK. What do you think happens to pigs urine?? Pigs eat and drink, so they p1ss and sh1t.... and put on weight. It's part of the circle of life.
Put the slurry through a filter press or centrifuge to get the solids out for making manure, the liquor is p1ss which is then pumped to storage and tankered away or pumped to fields so the yield of crops is greater. Another part of the circle of life.