A simple and low-cost test to measure the physical strength of faecal sludge simulants is presented and used in the development of improved desludging pumps in Kampala, Uganda. The technical performance of two variants of the Gulper manual pump have for the first time been quantitatively assessed under controlled conditions. The time taken to prime and the average flow rate in the following 30 seconds are reported for both pumps on two different strengths of faecal sludge, demonstrating a distinct improvement in the redesigned Gulper II. This pump is now undergoing field trials across East Africa with a view to it being marketed and sold to pit-emptying entrepreneurs by Sanitation Solutions Group.
Eliminating sludge islands in your wastewater lagoon
Old municipal and industrial wastewater lagoons have the tendency to build islands of sludge at various locations around the lagoon. It is most common for older lagoons to build such islands wherever wastewater enters the lagoons. Of course, this is because the solids entering the lagoon have enough weight to fall out of the water as flow velocity is reduced, so the solids pile up just after entering the lagoon. Sometimes these sludge islands will build very near a surface aerator, because the violence of the...
Revitalizing a hog waste lagoon
A North Carolina hog grower with a brood barn of 200 full grown sows contacted Reliant Water Technologies to see if we could assist him with one of his waste lagoons. All of his lagoons were identical, measuring only .05 acres in size, and designed to be 8 feet deep. When we arrived at the farm all of the lagoons looked like the one in Figure 1.The lagoon that he chose for us to work with was located closest to the barn, and his goal was to use the water on the surface of the lagoon as wash-down water for the...
Aeration System Upgrade Increases Flow Capacity and Reclaimed Water Availability
Read the full Case Study:Replacing Brush Rotors with Aire-O2 Tritons® Increases Flow Capacity and Reclaimed Water Availability Overview: In 2012, the Middlebury, Indiana Wastewater Treatment Plant (WWTP) was faced with aging brush rotors and higher loads in their oxidation ditch system. When Mick Reese was hired as Plant Superintendent, the upgrade design was about 90% complete. The full system upgrade included adding an outer ring to the existing oxidation oval, construction of a new clarifier, controls...
Sludge Blanket Level Detection – making new process opportunities possible
Much Pulsar`s Self-Cleaning Viper Sludge Sensor of the demonstrating the effective maintenance-free solution. discussion around the way we deal with sewage sludge – the way it is moved around the process, the bellmouth valves and decant processes, the downstream treatment of the liquors, important issues around TOTEX and discharge Compliance, plus more recently the green energy benefits of on-site power generation – depends in large part on the accurate and reliable measurement of the strata of the...
Case study - Florida, USA – advanced sequencing batch reactor
300,000 gpd ASBR facility replaced the existing concrete and steel conventional extended aeration activated sludge treatment, settlement clarifiers, and aerobic sludge digestors. Receives wastewater collected from 14 neighborhoods, residential housing, nursing homes and hospital facilities on a 425 acre site. Wastewater treatment comprises flow metering, fine screening and washing, grit collection, surge tank (flow balancing), flow splitting, two (2) basin ASBR process, flow equalization, tertiary filtration...