Waste water from a bakery containing sulfides

Waste water from a bakery contains sulfides (possibly from eggs). Can oxidation take care of the sulfides in the water?

If yes, and the owner employs a blower/diffuser to increase oxygen in the water, how much air needs to be blown into the water to oxidize 1kg of sulfide?

Taxonomy

• Industrial Wastewater Treatment
• Industrial Water Treatment
• Industrial Water Treatment
• Food Processing
• Bakery Products
• Bread
• Pastries

3 Answers

1. Hi Josphat,

   Just a couple of questions to get a better picture of your application:

   Are the sulfides soluble or insoluble?

   Oxidation using air tends to be very quite slow. Are you able to offer a large retention time in your existing process?

   Why do you need to remove the sulfides?

   Regards,

   Daniel

2. 1 mg/L H2S  requires 5 mg/L O2 = H2O + SO4, see sulfur cycle chart for chemical/biological reactions.

3. Why do you need to oxidize the sulphides?   The soil needs sulpur so it is more a question of sulphur concentration in the waste water, sulphur levels in the soil and application rate.