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Land Application

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Opinion: Spreading biosolids still the best option

Submitted by PSmall on Fri, 03/05/2010 - 16:13

A concise evaluation of the problems and the practical options involving biosolids.  Conclusion: the cost advantage of making land application work is compelling.  Peak phosphorus, not mentioned in the article, means that land application on cropland will increasingly sort out as the highest and best use for biosolids.

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Arsenic: Ponds Linked to Contaminated Drinking Water in Bangladesh

Submitted by PSmall on Fri, 11/20/2009 - 12:09

Arsenic contaminated drinking water is a huge problem in Bangladesh. Scott alerts us to the news that the critical source of the contamination has been discovered: ponds excavated to provide material for flood protection.

The culprit, says the new study, are tens of thousands of man-made ponds excavated to provide soil for flood protection.
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PSmall's picture

Biochar CCE continued

Submitted by PSmall on Tue, 10/27/2009 - 09:08

Fleshing out my previous statements made in support of the need to start gauging the neutralizing power of biochar.

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BioChar and Calcium Carbonate Equivalent

Submitted by PSmall on Mon, 10/26/2009 - 22:51

Determining the neutralizing potential of fly ash is standard practice for permitted land application. It should be a standard practice for land application of biochar.

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Mumbai uses Low Cost Soil Biotechnology to Treat Waste

Submitted by PSmall on Mon, 09/07/2009 - 10:55
"...to purify water we are looking at a technology which will use very little energy. This will integrate with the natural cycles of our environment."
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Anaerobic Soil Impairs Sprayfield in Ellensburg, WA

Submitted by PSmall on Sun, 07/26/2009 - 11:38
Anaerobic Soil Impairs Sprayfield in Ellensburg, WA

Twin City Foods will be building pretreatment facilities to mitigate for the effects of hydraulic overloading in the sprayfield it operates in Ellensburg, WA.

According to John Akers, City of Ellensburg, public works director, the company's spray fields are unable to take up nutrients because too much water is being put into the soil.
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BOD Overload at Cheese Processor Sprayfield

Submitted by PSmall on Sat, 07/25/2009 - 12:08

ImageStartup design for this wastewater sprayfield was intended to closely match expanded cheese processing operations to sprayfield capacity. However the design team failed to mitigate for the risk of anaerobic failure, resulting in the hydraulic "blinding" depicted in the above photo. Curtailed plant operations resulted due to no reserve treatment capacity, impaired post-failure sprayfield treatment capacity, and no economical alternative treatment option.

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Lab suggestions for P sorption capacity

Submitted by PSmall on Tue, 03/17/2009 - 11:05

The ability of soil to retain applied phosphorus depends on the P sorption capacity and physico-chemical properties of soils. There are myriad ways to characterize P sorption capacity. I am on the hunt for commercial labs that work in this area. Any suggestions? I'll post more as I learn more.

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Proper Use of Dipyridyl

2,2' Dipyridyl indicator dye (CAS # 366-18-7) is a relatively inexpensive tool for confirming reduced conditions in saturated soil.

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Staff Scientist I - (Geologist or Soil Scientist)

Description
MACTEC Engineering and Consulting, Inc. is a leading consulting firm providing engineering, environmental and remedial construction services to public and private clients worldwide. Operating with over 3,000 employees in 100 offices nationwide, MACTEC is currently ranked 31st among Engineering News-Record’s top 500 design firms.

Staff Scientist I (Geologist or Soil Scientist) - Knoxville, TN

Key Responsibilities

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