A jerky or malfunctioning sludge collector could be attributed to which issue?

A jerky or malfunctioning sludge collector often indicates issues that can affect its operation. The presence of a sludge blanket that is too deep can lead to problems for the sludge collection system. When the blanket is overly deep, it can cause increased resistance against the sludge collector. This resistance may hinder the collector's ability to function smoothly, leading to erratic movement and a malfunctioning mechanism.

In this context, a deep sludge blanket can impede the flow of sludge toward the collector and disrupt the uniformity of collection. A properly managed sludge blanket depth is crucial for maintaining optimal performance. By ensuring the blanket is at an appropriate level, the system can function without unnecessary strain or obstruction.

Other factors mentioned may contribute to operational issues, but the specific concern with a deep sludge blanket is directly tied to the collector's performance, making it the most relevant answer for this situation.