Skip to main content

CHALLENGES OF HEAT DRYING BIOSOLIDS

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

In 2001 the Milwaukee Metropolitan Sewerage District celebrated the seventy-fifth anniversary of the continuous production of the heat dried biosolids fertilizer called Milorganite┬«. This biosolids fertilizer is produced at the Jones Island Wastewater Treatment Plant and is sold in bags or bulk to distributors in all 50 States and in Canada. While there is a long-term record of production of this biosolids fertilizer, there have been many challenges over the years, both in production and in marketing. In 1994 a new dewatering and drying facility was put into operation, replacing the old facility, which had served faithfully for nearly 70 years. While the design of this new facility incorporated many improvements, modifications are still being made to address operational problem areas. This paper discusses some of the more recent modifications, as well as other production issues an agency should be aware of before including “drying” in the biosolids processing train.

Seven areas of concern are discussed in this paper: 1. Controlling abrasion and corrosion; 2. Maintaining nutrient content; 3. Controlling particle size; 4. Avoiding combustion during production; 4. Avoiding combustion during storage; 6. Controlling air emissions; 7. Supplying the drying energy. These areas are discussed, both from a design and from an operational perspective, along with remedial measures pursued or being pursued by the Milwaukee Metropolitan Sewerage District.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864702784162624

Publication date: 2002-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more