The Arkansas Department of Energy and Environment – Division of Environmental Quality (“DEQ”) and Warren Water and Sewer (“Warren”) entered into a December 17th Consent Administrative Order (“CAO”) addressing alleged violations of a Clean Water Act National Pollution Discharge Elimination (“NPDES”) permit. See LIS No. 20-199.
Warren is stated to operate a municipal wastewater treatment facility (“Facility”) in Bradley County, Arkansas.
The Facility is stated to discharge treated wastewater to the Saline River. Such discharge is stated to be authorized pursuant to an NPDES permit.
Warren is stated to have submitted a sludge removal plan and detention time calculations to DEQ on March 30, 2018, in accordance with its NPDES permit. DEQ subsequently sent Warren a request for a Corrective Action Plan (“CAP”) to address effluent violations.
Highlights
The U.S. Environmental Protection Agency (EPA) has published its National Pollutant Discharge Elimination System (NPDES) 2021 Issuance of the Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activity (MSGP).
Several items from the proposed 2020 MSGP were not adopted in the final version, including a coal-tar sealcoat prohibition, expansion beyond the 2015 MSGP provisions for permitted discharges to CERCLA/Superfund sites, automatic delays to new discharger authorization due to enforcement, universal benchmark monitoring for all dischargers (as opposed to sector-specific requirements) and requiring sector-specific control measure fact sheet checklists.
The permit s effective date is March 1, 2021. Operators with permit coverage under the 2015 MSGP (which has been administratively continued) have until May 30, 2021, to submit a new Notice of Intent (NOI). Eligible new dischargers are required to submit an NOI for permit coverage at least 30
Ultrafiltration (UF) is commonly used as a pre-treatment to Reverse Osmosis (RO) to ensure reliable, consistent and efficient operation. As Shandong Hongxin Chemicals Co., Ltd in China recently discovered, this consistency and reliability, along with quick setup and installation times, helped them realize convenience and cost savings. Additionally, given the fluctuations in contamination levels of the water source, the selected UF modules continuously exceeded requirements. In 2014, HWTT designed a 13,000 m
³/day ultrafiltration system that was equipped with 120 3M™ Liqui-Flux™ W10 Ultrafiltration Modules to provide reliable pre-treatment to RO. The water source for this project was the middle and lower reach of the Yellow River. The system design consisted of a settling pool to lower Total Suspended Solids (TSS) such as sludge and sand from the river. A heat exchanger is used maintain a certain minimum water temperature in colder months.
India’s biggest natural sewage treatment plant coming up in Tirupati DECCAN CHRONICLE.
Updated Dec 18, 2020, 10:11 am IST
It is the biggest in the country after the 3 MLD natural STP in Delhi
The working process of natural STP is that the sedimentation tank allows the sewage to stand for a long time and the total suspended solids will settle down.
TIRUPATI: The Municipal Corporation of Tirupati (MCT) has recently taken up an eco-friendly project – Natural Sewage Treatment Plant (STP) of five million litres per day (MLD) capacity. It is the biggest in the country after the 3 MLD natural STP in Delhi.