Thanks for your query.Based on the facts that you have posted it appears that your husband has passed white thick chalky substance in urine .
With history of pain in abdomen it is most likely this could be urinary stone
or a bunch of debris from bladder infection..However final diagnosis can be confirmed only on urine analysis .
Please get your routine urine test and urine culture done to find out the organisms causing this infection
Please take broad spectrum antibiotics along with urinary antiseptic like Nitrofurantoin
twice daily and urine alkaliser thrice daily.
Ensure to drink more water.To keep your urine dilute.