UNSPSC 47101524: Sludge or sewage composting equipment

UNSPSC 47101524 Sludge or sewage composting equipment is a Commodity code under which state and local governments procure liquid sludge hauling services and anaerobic digester tank rehabilitation and maintenance. Recent solicitations show the code capturing transport of wastewater treatment byproducts from multiple facilities to disposal or treatment sites, as well as the refurbishment or replacement of digester equipment to extend asset life and maintain treatment capacity. The Maryland Environmental Service has issued two competitive sealed bid invitations for liquid sludge hauling—one covering four wastewater treatment plants in Washington and Frederick Counties with approximately 586,000 gallons of estimated annual transport volume, and a second covering six central region facilities with 309,000 gallons annually—both structured as per-gallon compensation with one-year initial terms and four one-year renewal options. The City of Goodyear, Arizona, has solicited rehabilitation or replacement of a 20,000-gallon anaerobic digester at its Corgett Water Reclamation Facility, with scope including tank replacement, aeration system refurbishment, piping and valve work, and commissioning. Issuing bodies include state environmental agencies and municipal water or wastewater utilities; Maryland Environmental Service appears as a repeat buyer under this code.

Geographic activity centers on Maryland and Arizona. The Maryland Environmental Service issued both liquid sludge hauling solicitations in spring 2026, with sealed bids due June 29, 2026, and May 26, 2026, respectively, both marked as Small Business Reserve (SBR) procurement or encouraging minority business enterprise participation. The City of Goodyear has posted two solicitations for digester tank work—IFB 26-0073 posted January 22, 2026, with bids due March 12, 2026, and IFB 26-0142 posted April 21, 2026, with bids due May 15, 2026. One additional record, the City of Holly Hill, Florida's September 2020 sole source purchase of a WesTech drive shaft unit for water treatment equipment, falls outside the current activity period and does not represent active procurement under this code. Maryland contractors must hold five years of liquid waste hauling experience, possess county permits, and comply with COMAR 26.04.06 and applicable federal regulations; Arizona bidders must maintain current Registrar of Contractors licenses and provide bonding and insurance per municipal specifications.