My Wastewater Stinks Like Rotten Eggs

We received a call last week from a company complaining that the wastewater in the collection pit of their wash bay stunk so bad the workers were not wanting to work. They complained that the wash water in the collection pit smelled like rotten eggs. Hydrogen Sulfide Stinks That rotten egg smell is Hydrogen Sulfide gas (H2S).  This gas is produced by what are called anaerobic (no oxygen) bacteria. Anaerobic bacteria can live in the sludge that settles to the bottom of your collection pit. You can often see small bubbles of this gas coming to the top of the ... » Read More

Ozone in Wastewater Treatment

Some History Ozone has been used in wastewater treatment for over 100 years.  Historically, its main use has been drinking water disinfection.   In Europe ozone treatment of drinking water is common.   In more recent years ozone has been used to treat wastewater for odor control and corrosion control. Ozone Oxidation Ozone is a naturally occurring form of atmospheric oxygen.   The oxygen we breath in has two atoms, Ozone has three.   The third atom of oxygen makes the ozone molecule highly unstable and highly reactive with a very high oxidation potential. Other oxidants such as hydrogen peroxide, sodium hypochlorite (bleach) and ... » Read More

Lowering BOD

Lowering BOD

What is BOD? BOD is Biochemical Oxygen Demand. It is a common yardstick used to determine the strength of wastewater.   It is a test conducted over 5 days and measures the oxygen uptake in mg/l. Your City municipal sewage treatment plant does not want high BOD wastewater as it increases the treatment time and the cost of treating.   Typical BOD from the average household is around 350 mg/l, industrial wastewater can go into the thousands of mg/l BOD. Lowering BOD to Avoid Fees Most municipalities will charge a fee for high BOD.   Take a look at your water and sewer ... » Read More

Granular Activated Carbon GAC

Which Chemicals Will Granular Activated Carbon (GAC) Adsorb?  A Quick Reference Guide.

I get asked all the time about specific chemicals and the probability of being adsorbed by Granular Activated Carbon.   Below is a quick reference guide.   Always ask your carbon supplier for the GAC Adsorption  isotherm for the chemical you want to remove.  The GAC Isotherm will show you the mg of chemical adsorbed per mg of GAC at constant temperature.   Also, bench scale testing is important as certain adsorption rates are affected by pH, soaps and by the presence of Chelating Compounds such as EDTA. Group 1: Chemicals readily adsorbed by Granular Activated Carbon (GAC) GAC commonly used to remove ... » Read More

Waste Water Treatability Testing with Clay Based Flocculants

A printing company in the Dallas area had a wastewater problem. The city of Dallas does not allow dye or inks that discolor the waste water and issued a Notice of Violation stating that the waste water must be pre-treated before discharge to the sewer or to stop the discharge. The company stopped the discharge and began to have waste water hauled off site for disposal. At the same time an internet search for treating options was conducted. Wilson Environmental was contacted and we offered to do a free treatability test. Our treatability test is simply a yes or no ... » Read More

Using Organo Clay in Disposable Filter Drums

If you need a temporary way to treat your waste waters for a few days or a week during routine cleaning or maintenance and continue to meet your pre-treatment discharge requirements, you might want to consider using a disposable Filter Drum containing organo clay. Disposable organo clay filter drums are typically 55 gallon drums filled with organo clay or blend of organo clay and filter coal or sand. Organo clay has a strong affinity for hydrocarbons such as oil and grease and is capable of absorbing from 20 % to 30% of its weight in oil and grease. Here is ... » Read More

Package Plants for RV Parks and New Home Developments in Texas

Planning to build homes or an RV Park on your property? Don’t have access to city sewer? Better check out the state permit requirements for your planned development first. Sewage treatment for RV parks or residential developments in Texas is explained below. A permit known as a TPDES (Texas Pollutant Discharge Elimination System) Permit is required to discharge any treated waste water or treated sewage to any body of water in the state of Texas. That includes rivers, lakes, streams and even dry creeks. The permitting process is a two-step process. Step 1 Step 1 is to request what is ... » Read More

Wash bay design mistake

Don’t Make this Wash Bay Design Mistake

An all too common wash bay design mistake I was recently working at an oil field service company in Houston and needed to walk out in the wash bay. It was a brand new wash bay, everything looked great. But I couldn’t believe it, the floor was slippery as an ice rink. I could barely walk across the floor. The construction contractor had put a smooth polished concrete finish on the wash bay floor. Add water, soap and the grease from the parts being washed and the floor turned into a slippery mess. The entire wash bay was a gigantic ... » Read More

SPCC Plan Checklist for Bulk Oil Storage Facilities

The following check list should be used to determine if your existing SPCC Plan is in compliance and if the FRP requirements for bulk storage facilities is being met. For general information on SPCC plans and requirements — click here. Download and print this checklist in PDF format — click here. SPCC Plan Checklist for Bulk Oil Storage Facilities I. Operator and Owner Addresses and phone Nos. correctly listed. II. Day-to-day Operations and Facility Background described in adequate detail. III. Receiving Water/Probable Flow Paths (e.g., facility storm drain, street storm drain, storm water outfall, overland to river or stream, flood ... » Read More

Wash Bay Odor Problems?

Does the water in your wash bay have a strong offensive odor? Is it especially noticeable after a period of inactivity such as Monday morning? What causes Wash bay Odor problems? Odor is usually from bacteria in the water under what is called anaerobic conditions (no oxygen). When those conditions exist the anaerobic bacteria produce Hydrogen Sulfide gas, and that gas smells like rotten eggs. This is usually most notable in the summer time when its warm or after a weekend when the water sits and becomes stagnate. How Do I Control Wash Bay Odor Problems? Manual Odor Controls: Visit your ... » Read More