Shopping basket > Review order Currently in your basket Before proceeding to checkout you will need you to either login or create an account. Your items will remain in your basket. USDItem TotalEvaluation of the Impacts of Three Advanced Primary Treatment Technologies on Performance of Water Resource Recovery Facilities (18 words) $11.50RemoveAchieving Less than 0.050 mg P/L Reliably with Active Chemical Sludge (325 words) $11.50RemoveWastewater Treatment Plant Design Handbook Chapter 8 - Physical and Chemical Processes for Advanced Wastewater Treatment (4,094 words) $7.00RemoveNet total: $30.00VAT: $0.00Gross total: $30.00 Payment info When you click the checkout button, you will be redirected to a secure Paypal page where you can either pay using an existing Paypal account, or pay by card without a Paypal account. Continue shopping We access Visa, Mastercard, Maestro, American Express all through Paypal.